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class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">nascondi</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Inizio</div> </a> </li> <li id="toc-Definizione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Definizione"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Definizione</span> </div> </a> <ul id="toc-Definizione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Unità_di_misura" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Unità_di_misura"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Unità di misura</span> </div> </a> <ul id="toc-Unità_di_misura-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Conducibilità_termica_di_alcune_sostanze" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Conducibilità_termica_di_alcune_sostanze"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Conducibilità termica di alcune sostanze</span> </div> </a> <ul id="toc-Conducibilità_termica_di_alcune_sostanze-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indice" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l'indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l'indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Conducibilità termica</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un'altra lingua. Disponibile in 63 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-63" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">63 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Termiese_geleidingsvermo%C3%AB" title="Termiese geleidingsvermoë - afrikaans" lang="af" hreflang="af" data-title="Termiese geleidingsvermoë" data-language-autonym="Afrikaans" data-language-local-name="afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%86%D8%A7%D9%82%D9%84%D9%8A%D8%A9_%D8%AD%D8%B1%D8%A7%D8%B1%D9%8A%D8%A9" title="ناقلية حرارية - arabo" lang="ar" hreflang="ar" data-title="ناقلية حرارية" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Conductivid%C3%A1_t%C3%A9rmica" title="Conductividá térmica - asturiano" lang="ast" hreflang="ast" data-title="Conductividá térmica" data-language-autonym="Asturianu" data-language-local-name="asturiano" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/W%C3%A4rmeleitf%C3%A4higkeit" title="Wärmeleitfähigkeit - bavarese" lang="bar" hreflang="bar" data-title="Wärmeleitfähigkeit" data-language-autonym="Boarisch" data-language-local-name="bavarese" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A6%D0%B5%D0%BF%D0%BB%D0%B0%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D0%B4%D0%BD%D0%B0%D1%81%D1%86%D1%8C" title="Цеплаправоднасць - bielorusso" lang="be" hreflang="be" data-title="Цеплаправоднасць" data-language-autonym="Беларуская" data-language-local-name="bielorusso" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A6%D0%B5%D0%BF%D0%BB%D0%B0%D0%BF%D1%80%D0%B0%D0%B2%D0%BE%D0%B4%D0%BD%D0%B0%D1%81%D1%8C%D1%86%D1%8C" title="Цеплаправоднасьць - Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Цеплаправоднасьць" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D0%BE%D0%BF%D0%BB%D0%BE%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%B8%D0%BC%D0%BE%D1%81%D1%82" title="Топлопроводимост - bulgaro" lang="bg" hreflang="bg" data-title="Топлопроводимост" data-language-autonym="Български" data-language-local-name="bulgaro" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Toplotna_provodljivost" title="Toplotna provodljivost - bosniaco" lang="bs" hreflang="bs" data-title="Toplotna provodljivost" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Conductivitat_t%C3%A8rmica" title="Conductivitat tèrmica - catalano" lang="ca" hreflang="ca" data-title="Conductivitat tèrmica" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Tepeln%C3%A1_vodivost" title="Tepelná vodivost - ceco" lang="cs" hreflang="cs" data-title="Tepelná vodivost" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%C4%82%D1%88%C4%83%D1%8F%D1%80%D0%B0%D1%81%D0%BB%C4%83%D1%85" title="Ăшăяраслăх - ciuvascio" lang="cv" hreflang="cv" data-title="Ăшăяраслăх" data-language-autonym="Чӑвашла" data-language-local-name="ciuvascio" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Specifik_varmeledningsevne" title="Specifik varmeledningsevne - danese" lang="da" hreflang="da" data-title="Specifik varmeledningsevne" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/W%C3%A4rmeleitf%C3%A4higkeit" title="Wärmeleitfähigkeit - tedesco" lang="de" hreflang="de" data-title="Wärmeleitfähigkeit" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%98%CE%B5%CF%81%CE%BC%CE%B9%CE%BA%CE%AE_%CE%B1%CE%B3%CF%89%CE%B3%CE%B9%CE%BC%CF%8C%CF%84%CE%B7%CF%84%CE%B1" title="Θερμική αγωγιμότητα - greco" lang="el" hreflang="el" data-title="Θερμική αγωγιμότητα" data-language-autonym="Ελληνικά" data-language-local-name="greco" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Thermal_conductivity_and_resistivity" title="Thermal conductivity and resistivity - inglese" lang="en" hreflang="en" data-title="Thermal conductivity and resistivity" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Termika_konduktivo" title="Termika konduktivo - esperanto" lang="eo" hreflang="eo" data-title="Termika konduktivo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Conductividad_t%C3%A9rmica" title="Conductividad térmica - spagnolo" lang="es" hreflang="es" data-title="Conductividad térmica" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Soojusjuhtivustegur" title="Soojusjuhtivustegur - estone" lang="et" hreflang="et" data-title="Soojusjuhtivustegur" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Bero-eroaletasun" title="Bero-eroaletasun - basco" lang="eu" hreflang="eu" data-title="Bero-eroaletasun" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%B3%D8%A7%D9%86%D9%86%D8%AF%DA%AF%DB%8C_%DA%AF%D8%B1%D9%85%D8%A7%DB%8C%DB%8C" title="رسانندگی گرمایی - persiano" lang="fa" hreflang="fa" data-title="رسانندگی گرمایی" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/L%C3%A4mm%C3%B6njohtavuus" title="Lämmönjohtavuus - finlandese" lang="fi" hreflang="fi" data-title="Lämmönjohtavuus" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Conductivit%C3%A9_thermique" title="Conductivité thermique - francese" lang="fr" hreflang="fr" data-title="Conductivité thermique" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Seoltacht_theirmeach" title="Seoltacht theirmeach - irlandese" lang="ga" hreflang="ga" data-title="Seoltacht theirmeach" data-language-autonym="Gaeilge" data-language-local-name="irlandese" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Condutividade_t%C3%A9rmica" title="Condutividade térmica - galiziano" lang="gl" hreflang="gl" data-title="Condutividade térmica" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%9E%D7%95%D7%9C%D7%99%D7%9B%D7%95%D7%AA_%D7%97%D7%95%D7%9D" title="מוליכות חום - ebraico" lang="he" hreflang="he" data-title="מוליכות חום" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%8A%E0%A4%B7%E0%A5%8D%E0%A4%AE%E0%A4%BE_%E0%A4%9A%E0%A4%BE%E0%A4%B2%E0%A4%95%E0%A4%A4%E0%A4%BE" title="ऊष्मा चालकता - hindi" lang="hi" hreflang="hi" data-title="ऊष्मा चालकता" data-language-autonym="हिन्दी" data-language-local-name="hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Toplinska_vodljivost" title="Toplinska vodljivost - croato" lang="hr" hreflang="hr" data-title="Toplinska vodljivost" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/H%C5%91vezet%C3%A9s" title="Hővezetés - ungherese" lang="hu" hreflang="hu" data-title="Hővezetés" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Konduktivitas_termal" title="Konduktivitas termal - indonesiano" lang="id" hreflang="id" data-title="Konduktivitas termal" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%86%B1%E4%BC%9D%E5%B0%8E%E7%8E%87" title="熱伝導率 - giapponese" lang="ja" hreflang="ja" data-title="熱伝導率" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Konduktivitas_termal" title="Konduktivitas termal - giavanese" lang="jv" hreflang="jv" data-title="Konduktivitas termal" data-language-autonym="Jawa" data-language-local-name="giavanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-ka mw-list-item"><a href="https://ka.wikipedia.org/wiki/%E1%83%97%E1%83%91%E1%83%9D%E1%83%92%E1%83%90%E1%83%9B%E1%83%A2%E1%83%90%E1%83%A0%E1%83%9D%E1%83%91%E1%83%90" title="თბოგამტარობა - georgiano" lang="ka" hreflang="ka" data-title="თბოგამტარობა" data-language-autonym="ქართული" data-language-local-name="georgiano" class="interlanguage-link-target"><span>ქართული</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%97%B4%EC%A0%84%EB%8F%84%EC%9C%A8" title="열전도율 - coreano" lang="ko" hreflang="ko" data-title="열전도율" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Conduttivit%C3%A0_t%C3%A8rmica" title="Conduttività tèrmica - lombardo" lang="lmo" hreflang="lmo" data-title="Conduttività tèrmica" data-language-autonym="Lombard" data-language-local-name="lombardo" class="interlanguage-link-target"><span>Lombard</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Siltumvad%C4%ABtsp%C4%93ja" title="Siltumvadītspēja - lettone" lang="lv" hreflang="lv" data-title="Siltumvadītspēja" data-language-autonym="Latviešu" data-language-local-name="lettone" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A2%D0%BE%D0%BF%D0%BB%D0%B8%D0%BD%D1%81%D0%BA%D0%B0_%D1%81%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%BB%D0%B8%D0%B2%D0%BE%D1%81%D1%82" title="Топлинска спроводливост - macedone" lang="mk" hreflang="mk" data-title="Топлинска спроводливост" data-language-autonym="Македонски" data-language-local-name="macedone" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%A4%E0%B4%BE%E0%B4%AA%E0%B4%9A%E0%B4%BE%E0%B4%B2%E0%B4%95%E0%B4%A4" title="താപചാലകത - malayalam" lang="ml" hreflang="ml" data-title="താപചാലകത" data-language-autonym="മലയാളം" data-language-local-name="malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Kekonduksian_haba" title="Kekonduksian haba - malese" lang="ms" hreflang="ms" data-title="Kekonduksian haba" data-language-autonym="Bahasa Melayu" data-language-local-name="malese" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Thermische_geleidbaarheid" title="Thermische geleidbaarheid - olandese" lang="nl" hreflang="nl" data-title="Thermische geleidbaarheid" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Varmeleiingsevne" title="Varmeleiingsevne - norvegese nynorsk" lang="nn" hreflang="nn" data-title="Varmeleiingsevne" data-language-autonym="Norsk nynorsk" data-language-local-name="norvegese nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Termisk_konduktivitet" title="Termisk konduktivitet - norvegese bokmål" lang="nb" hreflang="nb" data-title="Termisk konduktivitet" data-language-autonym="Norsk bokmål" data-language-local-name="norvegese bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Przewodno%C5%9B%C4%87_cieplna" title="Przewodność cieplna - polacco" lang="pl" hreflang="pl" data-title="Przewodność cieplna" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D8%AF_%D8%AA%D9%88%D8%AF%D9%88%D8%AE%DB%90_%D8%AA%DB%90%D8%B1%DB%90%D8%AF%D9%86%D9%87" title="د تودوخې تېرېدنه - pashto" lang="ps" hreflang="ps" data-title="د تودوخې تېرېدنه" data-language-autonym="پښتو" data-language-local-name="pashto" class="interlanguage-link-target"><span>پښتو</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Condutividade_t%C3%A9rmica" title="Condutividade térmica - portoghese" lang="pt" hreflang="pt" data-title="Condutividade térmica" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Conductivitate_termic%C4%83" title="Conductivitate termică - rumeno" lang="ro" hreflang="ro" data-title="Conductivitate termică" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D0%B5%D0%BF%D0%BB%D0%BE%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D0%BD%D0%BE%D1%81%D1%82%D1%8C" title="Теплопроводность - russo" lang="ru" hreflang="ru" data-title="Теплопроводность" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Thermal_conductivity" title="Thermal conductivity - scozzese" lang="sco" hreflang="sco" data-title="Thermal conductivity" data-language-autonym="Scots" data-language-local-name="scozzese" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Toplinska_vodljivost" title="Toplinska vodljivost - serbo-croato" lang="sh" hreflang="sh" data-title="Toplinska vodljivost" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="serbo-croato" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Thermal_conductivity" title="Thermal conductivity - Simple English" lang="en-simple" hreflang="en-simple" data-title="Thermal conductivity" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Koeficient_tepelnej_vodivosti" title="Koeficient tepelnej vodivosti - slovacco" lang="sk" hreflang="sk" data-title="Koeficient tepelnej vodivosti" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Toplotna_prevodnost" title="Toplotna prevodnost - sloveno" lang="sl" hreflang="sl" data-title="Toplotna prevodnost" data-language-autonym="Slovenščina" data-language-local-name="sloveno" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D0%BE%D0%BF%D0%BB%D0%BE%D1%82%D0%BD%D0%B0_%D0%BF%D1%80%D0%BE%D0%B2%D0%BE%D0%B4%D1%99%D0%B8%D0%B2%D0%BE%D1%81%D1%82" title="Топлотна проводљивост - serbo" lang="sr" hreflang="sr" data-title="Топлотна проводљивост" data-language-autonym="Српски / srpski" data-language-local-name="serbo" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/V%C3%A4rmeledningsf%C3%B6rm%C3%A5ga" title="Värmeledningsförmåga - svedese" lang="sv" hreflang="sv" data-title="Värmeledningsförmåga" data-language-autonym="Svenska" data-language-local-name="svedese" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%B5%E0%AF%86%E0%AE%AA%E0%AF%8D%E0%AE%AA%E0%AE%95%E0%AF%8D_%E0%AE%95%E0%AE%9F%E0%AE%A4%E0%AF%8D%E0%AE%A4%E0%AF%81%E0%AE%A4%E0%AE%BF%E0%AE%B1%E0%AE%A9%E0%AF%8D" title="வெப்பக் கடத்துதிறன் - tamil" lang="ta" hreflang="ta" data-title="வெப்பக் கடத்துதிறன்" data-language-autonym="தமிழ்" data-language-local-name="tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%93%D0%B0%D1%80%D0%BC%D0%B8%D0%B3%D1%83%D0%B7%D0%B0%D1%80%D0%BE%D0%BD%D3%A3" title="Гармигузаронӣ - tagico" lang="tg" hreflang="tg" data-title="Гармигузаронӣ" data-language-autonym="Тоҷикӣ" data-language-local-name="tagico" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Termal_na_konduktibidad" title="Termal na konduktibidad - tagalog" lang="tl" hreflang="tl" data-title="Termal na konduktibidad" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Is%C4%B1_iletkenli%C4%9Fi" title="Isı iletkenliği - turco" lang="tr" hreflang="tr" data-title="Isı iletkenliği" data-language-autonym="Türkçe" data-language-local-name="turco" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk badge-Q70893996 mw-list-item" title=""><a href="https://uk.wikipedia.org/wiki/%D0%9A%D0%BE%D0%B5%D1%84%D1%96%D1%86%D1%96%D1%94%D0%BD%D1%82_%D1%82%D0%B5%D0%BF%D0%BB%D0%BE%D0%BF%D1%80%D0%BE%D0%B2%D1%96%D0%B4%D0%BD%D0%BE%D1%81%D1%82%D1%96" title="Коефіцієнт теплопровідності - ucraino" lang="uk" hreflang="uk" data-title="Коефіцієнт теплопровідності" data-language-autonym="Українська" data-language-local-name="ucraino" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Issiqlik_o%CA%BBtkazuvchanlik" title="Issiqlik oʻtkazuvchanlik - uzbeco" lang="uz" hreflang="uz" data-title="Issiqlik oʻtkazuvchanlik" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbeco" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/%C4%90%E1%BB%99_d%E1%BA%ABn_nhi%E1%BB%87t" title="Độ dẫn nhiệt - vietnamita" lang="vi" hreflang="vi" data-title="Độ dẫn nhiệt" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamita" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E7%83%AD%E5%AF%BC%E7%8E%87" title="热导率 - wu" lang="wuu" hreflang="wuu" data-title="热导率" 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</div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">sposta nella barra laterale</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">nascondi</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Da Wikipedia, l'enciclopedia libera.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"><span class="mw-redirectedfrom">(Reindirizzamento da <strong><a href="/w/index.php?title=Conduttivit%C3%A0_termica&redirect=no" class="mw-redirect" title="Conduttività termica">Conduttività termica</a></strong>)</span></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="it" dir="ltr"><figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:SnowMeltingOnPavingStones.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/SnowMeltingOnPavingStones.jpg/310px-SnowMeltingOnPavingStones.jpg" decoding="async" width="310" height="247" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a6/SnowMeltingOnPavingStones.jpg/465px-SnowMeltingOnPavingStones.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a6/SnowMeltingOnPavingStones.jpg/620px-SnowMeltingOnPavingStones.jpg 2x" data-file-width="3546" data-file-height="2825" /></a><figcaption>A causa della differente conducibilità termica tra le lastre di pavimentazione che compongono questo patio e il prato che lo circonda, il <a href="/wiki/Calore" title="Calore">calore</a> residuo nella terra ha fuso parte della neve caduta sulle lastre, ma non quella caduta sul prato.</figcaption></figure> <p>La <b>conducibilità termica</b>, o <b>conduttività termica</b>, in <a href="/wiki/Fisica" title="Fisica">fisica</a> e in particolare nella <a href="/wiki/Termodinamica" title="Termodinamica">termodinamica</a>, è una <a href="/wiki/Grandezza_fisica" title="Grandezza fisica">grandezza fisica</a> che misura l'attitudine di una sostanza a trasmettere il <a href="/wiki/Calore" title="Calore">calore</a> attraverso la <a href="/wiki/Conduzione_termica" title="Conduzione termica">conduzione termica</a>, quando i contributi al trasferimento di calore per <a href="/wiki/Convezione" title="Convezione">convezione</a> e per <a href="/wiki/Irraggiamento_termico" class="mw-redirect" title="Irraggiamento termico">irraggiamento termico</a> siano trascurabili. Essa dipende dalla natura del <a href="/wiki/Materiale" title="Materiale">materiale</a>, ma non dalla sua forma, e lega la <a href="/wiki/Densit%C3%A0_di_corrente" class="mw-redirect" title="Densità di corrente">densità di</a> <a href="/wiki/Corrente_termica" class="mw-redirect" title="Corrente termica">corrente termica</a> al <a href="/wiki/Gradiente_di_temperatura" title="Gradiente di temperatura">gradiente di temperatura</a> che provoca il passaggio del calore. </p><p>Dipende dunque dalla <a href="/wiki/Temperatura" title="Temperatura">temperatura</a>; inoltre, per alcuni materiali aumenta all'aumentare della temperatura, per altri diminuisce, e può dipendere da altri fattori fisici come la porosità, che blocca i <a href="/wiki/Fonone" title="Fonone">fononi</a> responsabili della conducibilità termica, <style data-mw-deduplicate="TemplateStyles:r140554517">.mw-parser-output .chiarimento{background:#ffeaea;color:#444444}.mw-parser-output .chiarimento-apice{color:#EE0700}@media screen{html.skin-theme-clientpref-night .mw-parser-output .chiarimento{background:rgba(179,36,36,0.21);color:inherit}html.skin-theme-clientpref-night .mw-parser-output .chiarimento-apice{color:#b32424}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .chiarimento{background:rgba(179,36,36,0.21);color:inherit}html.skin-theme-clientpref-os .mw-parser-output .chiarimento-apice{color:#b32424}}</style><span class="chiarimento" title="Queste informazioni non sono comprovate da fonti attendibili.">dall'induzione magnetica e dipende anche dalla <a href="/wiki/Pressione" title="Pressione">pressione</a> nel caso di aeriformi.</span><sup class="noprint chiarimento-apice" title="Queste informazioni non sono comprovate da fonti attendibili.">[<i><a href="/wiki/Wikipedia:Uso_delle_fonti" title="Wikipedia:Uso delle fonti">senza fonte</a></i>]</sup> </p><p>Non va confusa con la <a href="/wiki/Diffusivit%C3%A0_termica" title="Diffusività termica">diffusività termica</a> <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \alpha }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi>α</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \alpha }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b79333175c8b3f0840bfb4ec41b8072c83ea88d3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.488ex; height:1.676ex;" alt="{\displaystyle \alpha }"></span> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r140554517"><span class="chiarimento" title="Queste informazioni non sono comprovate da fonti attendibili.">(o "conducibilità termometrica")</span><sup class="noprint chiarimento-apice" title="Queste informazioni non sono comprovate da fonti attendibili.">[<i><a href="/wiki/Wikipedia:Uso_delle_fonti" title="Wikipedia:Uso delle fonti">senza fonte</a></i>]</sup>, che è invece il rapporto fra la conducibilità termica e il prodotto fra <a href="/wiki/Densit%C3%A0" title="Densità">densità</a> e <a href="/wiki/Calore_specifico" title="Calore specifico">calore specifico</a> della data sostanza, espressa nel <a href="/wiki/Sistema_internazionale_di_unit%C3%A0_di_misura" title="Sistema internazionale di unità di misura">Sistema Internazionale</a> in m<sup>2</sup>·s<sup>-1</sup> (analogamente a tutte le diffusività) e misura l'attitudine di una sostanza a trasmettere, non il calore, bensì una variazione di temperatura.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Definizione">Definizione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=1" title="Modifica la sezione Definizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=1" title="Edit section's source code: Definizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La conducibilità termica, indicata solitamente con <i>k<sub>T</sub></i>, è un <a href="/wiki/Tensore_del_secondo_ordine" class="mw-redirect" title="Tensore del secondo ordine">tensore del secondo ordine</a>, rappresentabile in un dato riferimento con una <a href="/wiki/Matrice_quadrata" title="Matrice quadrata">matrice quadrata</a>, ed è definita attraverso la <a href="/wiki/Legge_di_Fourier" class="mw-redirect" title="Legge di Fourier">legge di Fourier</a> come: </p> <dl><dd><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle k_{ij}=-\mathbf {q} \otimes \nabla T^{-1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <msub> <mi>k</mi> <mrow class="MJX-TeXAtom-ORD"> <mi>i</mi> <mi>j</mi> </mrow> </msub> <mo>=</mo> <mo>−</mo> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">q</mi> </mrow> <mo>⊗</mo> <mi mathvariant="normal">∇</mi> <msup> <mi>T</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle k_{ij}=-\mathbf {q} \otimes \nabla T^{-1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/38cfb599e9609faa1a1fb572889b59fdf1ec0410" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.005ex; width:17.84ex; height:3.343ex;" alt="{\displaystyle k_{ij}=-\mathbf {q} \otimes \nabla T^{-1}}"></span></dd></dl> <p>dove: </p> <ul><li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathbf {q} }"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="bold">q</mi> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mathbf {q} }</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7be005a326b7ac3fe4c24bca391369f44c4c2876" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.671ex; width:1.416ex; height:2.009ex;" alt="{\displaystyle \mathbf {q} }"></span> è la densità di corrente termica</li> <li><span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \nabla T}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mi mathvariant="normal">∇</mi> <mi>T</mi> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \nabla T}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f821c5afeadd28e07e1e1142c10b4656c7751d51" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:3.572ex; height:2.176ex;" alt="{\displaystyle \nabla T}"></span> è il gradiente di temperatura.</li></ul> <p>In <a href="/wiki/Stazionariet%C3%A0" class="mw-redirect" title="Stazionarietà">condizioni stazionarie</a>, i due vettori risultano paralleli, quindi la conducibilità termica è una <a href="/wiki/Grandezza_scalare" title="Grandezza scalare">grandezza scalare</a> indicata solitamente con <i>λ</i>, il che corrisponde a dire che la conducibilità termica è una <a href="/wiki/Costante_di_proporzionalit%C3%A0" class="mw-redirect" title="Costante di proporzionalità">costante di proporzionalità</a> pari al rapporto fra la <a href="/wiki/Flusso#:~:text=In_fisica,_la_densità_di,che_coinvolgono_la_suddetta_quantità." title="Flusso">densità di flusso di calore</a> (o densità di corrente termica) , cioè la quantità di <a href="/wiki/Calore" title="Calore">calore</a> trasferita nell'unità di <a href="/wiki/Tempo" title="Tempo">tempo</a> attraverso l'unità di <a href="/wiki/Area" title="Area">superficie</a>, e il gradiente di temperatura.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>La conducibilità termica può essere stimata al variare della <a href="/wiki/Temperatura_critica" title="Temperatura critica">temperatura ridotta</a> e della <a href="/wiki/Pressione_critica" title="Pressione critica">pressione ridotta</a> per via grafica, utilizzando un <i>diagramma generalizzato</i>.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Unità_di_misura"><span id="Unit.C3.A0_di_misura"></span>Unità di misura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=2" title="Modifica la sezione Unità di misura" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=2" title="Edit section's source code: Unità di misura"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nelle unità del <a href="/wiki/Sistema_internazionale_di_unit%C3%A0_di_misura" title="Sistema internazionale di unità di misura">Sistema Internazionale</a>, la conducibilità termica è misurata in <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {W} \cdot \mathrm {m} ^{-1}\cdot \mathrm {K} ^{-1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">W</mi> </mrow> <mo>⋅</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">m</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> <mo>⋅</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">K</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mathrm {W} \cdot \mathrm {m} ^{-1}\cdot \mathrm {K} ^{-1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/6222abb0d9943600ea53b6931b9eec523cdebb83" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:14.157ex; height:2.676ex;" alt="{\displaystyle \mathrm {W} \cdot \mathrm {m} ^{-1}\cdot \mathrm {K} ^{-1}}"></span> (<i>watt al metro-kelvin</i>), essendo il <a href="/wiki/Watt" title="Watt">watt</a> l'unità di misura della <a href="/wiki/Potenza_(fisica)" title="Potenza (fisica)">potenza</a>, il <a href="/wiki/Metro" title="Metro">metro</a> l'unità di misura della <a href="/wiki/Lunghezza" title="Lunghezza">lunghezza</a> e il <a href="/wiki/Kelvin" title="Kelvin">kelvin</a> l'unità di misura della <a href="/wiki/Temperatura" title="Temperatura">temperatura</a>. Nel <a href="/wiki/Sistema_pratico_degli_ingegneri" title="Sistema pratico degli ingegneri">sistema pratico degli ingegneri</a>, invece, essa è misurata in <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle \mathrm {kcal} \cdot \mathrm {h} ^{-1}\cdot \mathrm {^{o}C} ^{-1}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">k</mi> <mi mathvariant="normal">c</mi> <mi mathvariant="normal">a</mi> <mi mathvariant="normal">l</mi> </mrow> <mo>⋅</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">h</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> <mo>⋅</mo> <msup> <mrow class="MJX-TeXAtom-ORD"> <msup> <mi></mi> <mrow class="MJX-TeXAtom-ORD"> <mi mathvariant="normal">o</mi> </mrow> </msup> <mi mathvariant="normal">C</mi> </mrow> <mrow class="MJX-TeXAtom-ORD"> <mo>−</mo> <mn>1</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle \mathrm {kcal} \cdot \mathrm {h} ^{-1}\cdot \mathrm {^{o}C} ^{-1}}</annotation> </semantics> </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/e1741e2277a4e00a80ad126694ec85a84a6ae164" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:16.118ex; height:2.676ex;" alt="{\displaystyle \mathrm {kcal} \cdot \mathrm {h} ^{-1}\cdot \mathrm {^{o}C} ^{-1}}"></span> (<i>chilocalorie all'ora-metro-grado Celsius</i>). </p> <div class="mw-heading mw-heading2"><h2 id="Conducibilità_termica_di_alcune_sostanze"><span id="Conducibilit.C3.A0_termica_di_alcune_sostanze"></span>Conducibilità termica di alcune sostanze</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=3" title="Modifica la sezione Conducibilità termica di alcune sostanze" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=3" title="Edit section's source code: Conducibilità termica di alcune sostanze"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La conducibilità influisce sulla capacità di un materiale di condurre il calore o fungere da isolante, vale a dire che maggiore è il valore di <i>λ</i> o <i>k<sub>T</sub></i>, meno isolante è il materiale. In genere, la conducibilità termica va di pari passo con la <a href="/wiki/Conducibilit%C3%A0_elettrica" class="mw-redirect" title="Conducibilità elettrica">conducibilità elettrica</a>; ad esempio i <a href="/wiki/Categoria:Metalli" title="Categoria:Metalli">metalli</a> presentano valori elevati di entrambe. Una notevole eccezione è costituita dal <a href="/wiki/Diamante" title="Diamante">diamante</a>, che ha un'elevata conducibilità termica, ma una scarsa conducibilità elettrica. </p> <table class="wikitable sortable"> <caption>Conducibilità termica e <a href="/wiki/Densit%C3%A0" title="Densità">densità</a> di alcune sostanze </caption> <tbody><tr> <th>Sostanza</th> <th>λ [W·m<sup>−1</sup>·K<sup>−1</sup>]</th> <th>ρ [kg/m<sup>3</sup>] </th></tr> <tr> <td><a href="/wiki/Diamante" title="Diamante">diamante</a></td> <td>1600</td> <td>3500 - 3600 </td></tr> <tr> <td><a href="/wiki/Argento" title="Argento">argento</a></td> <td>460</td> <td>10490 </td></tr> <tr> <td><a href="/wiki/Rame" title="Rame">rame</a></td> <td>390</td> <td>8930 </td></tr> <tr> <td><a href="/wiki/Oro" title="Oro">oro</a></td> <td>320</td> <td>19250 </td></tr> <tr> <td><a href="/wiki/Alluminio" title="Alluminio">alluminio</a> laminato</td> <td>290</td> <td>2750 </td></tr> <tr> <td><a href="/wiki/Ottone_(lega)" title="Ottone (lega)">ottone</a></td> <td>111</td> <td>8430 - 8730 </td></tr> <tr> <td><a href="/wiki/Ferro" title="Ferro">ferro</a></td> <td>80,2</td> <td>7874 </td></tr> <tr> <td><a href="/wiki/Platino" title="Platino">platino</a></td> <td>70</td> <td>21400 </td></tr> <tr> <td><a href="/wiki/Acciaio" title="Acciaio">acciaio</a> laminato</td> <td>52</td> <td>7850 </td></tr> <tr> <td><a href="/wiki/Piombo" title="Piombo">piombo</a></td> <td>35</td> <td>11300 </td></tr> <tr> <td><a href="/wiki/Acciaio_inox" class="mw-redirect" title="Acciaio inox">acciaio inox</a></td> <td>17</td> <td>7480 - 8000 </td></tr> <tr> <td><a href="/wiki/Quarzo" title="Quarzo">quarzo</a></td> <td>8</td> <td>2500 - 2800 </td></tr> <tr> <td><a href="/wiki/Ghiaccio" title="Ghiaccio">ghiaccio</a> (acqua a 0°)</td> <td>2,20 - 2,50</td> <td>917 </td></tr> <tr> <td><a href="/wiki/Vetro" title="Vetro">vetro</a> laminato</td> <td>1</td> <td>2500 </td></tr> <tr> <td><a href="/wiki/Laterizi" class="mw-redirect" title="Laterizi">laterizi</a> (mattoni pieni, forati) </td> <td>0,90</td> <td>2000 </td></tr> <tr> <td><a href="/wiki/Laterizi" class="mw-redirect" title="Laterizi">laterizi</a> (mattoni pieni, forati) </td> <td>0,72</td> <td>1800 </td></tr> <tr> <td><a href="/wiki/Neve" title="Neve">neve</a> (compatta, strati da 20 a 40 cm)</td> <td>0,70</td> <td> </td></tr> <tr> <td><a href="/wiki/Acqua_distillata" title="Acqua distillata">acqua distillata</a></td> <td>0,60</td> <td>1000 </td></tr> <tr> <td><a href="/wiki/Laterizi" class="mw-redirect" title="Laterizi">laterizi</a> (mattoni pieni, forati)</td> <td>0,43</td> <td>1200 </td></tr> <tr> <td><a href="/wiki/Laterizi" class="mw-redirect" title="Laterizi">laterizi</a> (mattoni pieni, forati)</td> <td>0,25</td> <td>600 </td></tr> <tr> <td><a href="/wiki/Glicole_etilenico" title="Glicole etilenico">glicole etilenico</a></td> <td>0,25</td> <td>1110 </td></tr> <tr> <td><a href="/wiki/Neve" title="Neve">neve</a> (moderatamente compatta, strati da 7 a 10 cm)</td> <td>0,23</td> <td> </td></tr> <tr> <td><a href="/wiki/Polipropilene" title="Polipropilene">polipropilene</a></td> <td>0,22</td> <td>920 </td></tr> <tr> <td><a href="/wiki/Cartongesso" title="Cartongesso">cartongesso</a></td> <td>0,21</td> <td>900 </td></tr> <tr> <td><a href="/wiki/Plexiglas" class="mw-redirect" title="Plexiglas">plexiglas</a></td> <td>0,19</td> <td>1180 </td></tr> <tr> <td><a href="/wiki/Carta" title="Carta">carta</a> e <a href="/wiki/Cartone" title="Cartone">cartone</a></td> <td>0,18 (0,14 - 0,23)</td> <td>700 - 1150 </td></tr> <tr> <td>legno di <a href="/wiki/Quercia" class="mw-redirect" title="Quercia">quercia</a> asciutto ortogonale alle fibre</td> <td>0,18</td> <td>750 </td></tr> <tr> <td><a href="/wiki/Idrogeno" title="Idrogeno">idrogeno</a></td> <td>0,172</td> <td> </td></tr> <tr> <td>legno asciutto parallelamente alle fibre</td> <td>0,15 - 0,27</td> <td>400 - 750 </td></tr> <tr> <td><a href="/wiki/Olio_minerale" title="Olio minerale">olio minerale</a></td> <td>0,15</td> <td>900 - 930 </td></tr> <tr> <td><a href="/wiki/Neve" title="Neve">neve</a> (soffice, strati da 3 a 7 cm)</td> <td>0,12</td> <td> </td></tr> <tr> <td>legno di <a href="/wiki/Abies" title="Abies">abete</a> e <a href="/wiki/Pino" class="mw-redirect" title="Pino">pino</a> asciutto ortogonale alle fibre</td> <td>0,10 - 0,12</td> <td>400 </td></tr> <tr> <td><a href="/wiki/Vermiculite" title="Vermiculite">vermiculite</a> espansa</td> <td>0,07</td> <td>90 </td></tr> <tr> <td><a href="/wiki/Cartone_ondulato" title="Cartone ondulato">cartone ondulato</a> (onda singola, 280 g/m<sup>2</sup>, sp. 2,8 mm) </td> <td>0,065</td> <td>100 </td></tr> <tr> <td><a href="/wiki/Neve" title="Neve">neve</a> (appena caduta e per strati fino a 3 cm)</td> <td>0,060</td> <td> </td></tr> <tr> <td><a href="/wiki/Canna_palustre" class="mw-redirect" title="Canna palustre">canna palustre</a> (o arelle)</td> <td>0,055</td> <td>190 </td></tr> <tr> <td>trucioli di legno</td> <td>0,050</td> <td>100 </td></tr> <tr> <td><a href="/wiki/Sughero" title="Sughero">sughero</a></td> <td>0,052</td> <td>200 </td></tr> <tr> <td>granuli di sughero</td> <td>0,050</td> <td>100 </td></tr> <tr> <td>vetro cellulare (120)</td> <td>0,041</td> <td>120 </td></tr> <tr> <td><a href="/wiki/Lana" title="Lana">lana</a> di pecora</td> <td>0,040</td> <td>25 </td></tr> <tr> <td><a href="/wiki/Polistirene" title="Polistirene">polistirolo</a> estruso (XPS) in lastre</td> <td>0,040</td> <td>20 - 30 </td></tr> <tr> <td>fibra di legno </td> <td>0,038 </td> <td>40 - 60 </td></tr> <tr> <td><a href="/wiki/Polistirene" title="Polistirene">polistirolo</a> espanso sinterizzato (EPS) in lastre</td> <td>0,035</td> <td>20 - 30 </td></tr> <tr> <td><a href="/wiki/Poliuretano_espanso" class="mw-redirect" title="Poliuretano espanso">poliuretano espanso</a></td> <td>0,024 - 0,032</td> <td>25 - 50 </td></tr> <tr> <td><a href="/wiki/Aria" title="Aria">aria</a> secca (a 300 K, 100 kPa) in quiete</td> <td>0,026</td> <td>1,2 </td></tr> <tr> <td><a href="/wiki/Aerogel" title="Aerogel">aerogel</a> di silice <p>(in granuli con dimensione media 0,5 - 4,0 mm ) </p> </td> <td>0,018</td> <td>1,9 </td></tr> <tr> <td>micronal - capsule termoisolanti a cambiamento di fase <p>(pannelli di cera incapsulata) </p> </td> <td>0,018</td> <td>770 </td></tr> <tr> <td><a href="/wiki/Aerogel" title="Aerogel">aerogel</a> di silice <p>(in pannelli sotto vuoto a <span class="nowrap"><span data-sort-value="6995170000000000000♠"></span>1,7<span style="margin-left:0.25em;margin-right:0.15em;">×</span>10<sup>−5</sup></span> atmosfere) </p> </td> <td>0,013</td> <td> </td></tr></tbody></table> <p>Uno studio del 2022 dimostra che l'<a href="/w/index.php?title=Arseniuro_di_boro&action=edit&redlink=1" class="new" title="Arseniuro di boro (la pagina non esiste)">arseniuro di boro</a> cubico possiede la terza migliore conduttività termica dopo quella del diamante e del <a href="/wiki/Nitruro_di_boro" title="Nitruro di boro">nitruro di boro</a> cubico, <a href="/wiki/Ordine_di_grandezza" title="Ordine di grandezza">dieci volte</a> superiore a quella del <a href="/wiki/Silicio" title="Silicio">silicio</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=4" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=4" title="Edit section's source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text">Confronta con l'equazione della propagazione del calore o più in generale: <a href="/wiki/Equazione_della_diffusione" class="mw-redirect" title="Equazione della diffusione">equazione della diffusione</a></span> </li> <li id="cite_note-2"><a href="#cite_ref-2"><b>^</b></a> <span class="reference-text">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://goldbook.iupac.org/T06299.html">IUPAC Gold Book, "thermal conductivity"</a></span> </li> <li id="cite_note-3"><a href="#cite_ref-3"><b>^</b></a> <span class="reference-text">Esistono altri <i>diagrammi generalizzati</i>, ad esempio per la stima del <a href="/wiki/Fattore_di_comprimibilit%C3%A0" title="Fattore di comprimibilità">fattore di comprimibilità</a>. Il diagramma generalizzato trova ragione di essere dal <a href="/wiki/Teorema_degli_stati_corrispondenti" title="Teorema degli stati corrispondenti">teorema degli stati corrispondenti</a>.</span> </li> <li id="cite_note-4"><a href="#cite_ref-4"><b>^</b></a> <span class="reference-text"><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="https://www.dday.it/redazione/43496/scoperto-il-semiconduttore-migliore-di-sempre-un-ricercatore-cinese-accusato-di-spionaggio-dagli-usa-ha-contribuito-alla-ricerca-.amp"><span style="font-style:italic;">Scoperto il semiconduttore migliore di sempre. Un ricercatore cinese accusato di spionaggio dagli USA ha contribuito alla ricerca</span></a>, su <span style="font-style:italic;">dday.it</span>, 17 agosto 2022. <small>URL consultato il 20 agosto 2022</small> <small>(<a rel="nofollow" class="external text" href="https://web.archive.org/web/20220820004959/https://www.dday.it/redazione/43496/scoperto-il-semiconduttore-migliore-di-sempre-un-ricercatore-cinese-accusato-di-spionaggio-dagli-usa-ha-contribuito-alla-ricerca-.amp">archiviato</a> il 20 agosto 2022)</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=5" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=5" title="Edit section's source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Robert Byron, Warren E. Stewart; Edwin N. Lightfoot, <span style="font-style:italic;">Transport Phenomena</span>, 2ª ed., New York, Wiley, 2005, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-470-11539-4" title="Speciale:RicercaISBN/0-470-11539-4">0-470-11539-4</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Frank P. Incropera, David P. DeWitt; Theodore L. Bergman; Adrienne S. Lavine, <span style="font-style:italic;">Fundamentals of Heat and Mass Transfer</span>, 6ª ed., Wiley, 2006, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/0-471-45728-0" title="Speciale:RicercaISBN/0-471-45728-0">0-471-45728-0</a>.</cite></li> <li><cite class="citation libro" style="font-style:normal"> Federico M. Butera, <span style="font-style:italic;">Architettura e ambiente</span>, 1ª ed., Milano, ETAS, 1995, <a href="/wiki/ISBN" title="ISBN">ISBN</a> <a href="/wiki/Speciale:RicercaISBN/88-453-0776-X" title="Speciale:RicercaISBN/88-453-0776-X">88-453-0776-X</a>.</cite></li></ul> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=6" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=6" title="Edit section's source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Conduzione_termica" title="Conduzione termica">Conduzione termica</a></li> <li><a href="/wiki/Coefficiente_convettivo" title="Coefficiente convettivo">Coefficiente convettivo</a></li> <li><a href="/wiki/Diffusivit%C3%A0_termica" title="Diffusività termica">Diffusività termica</a></li> <li><a href="/wiki/Trasmittanza_termica" title="Trasmittanza termica">Trasmittanza termica</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=7" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=7" title="Edit section's source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:Thermal conductivity"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Thermal_conductivity?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:Thermal_conductivity?uselang=it">conducibilità termica</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&veaction=edit&section=8" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Conducibilit%C3%A0_termica&action=edit&section=8" title="Edit section's source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com_science/thermal-conductivity" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) Ken Stewart, <a rel="nofollow" class="external text" href="https://www.britannica.com/science/thermal-conductivity"><span style="font-style:italic;">thermal conductivity</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q487005#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li> <li><cite id="CITEREFBritannica.com_science/radiation-conductivity" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/science/radiation-conductivity"><span style="font-style:italic;">radiation conductivity</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q487005#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li> <li><cite class="citation web" style="font-style:normal"> <a rel="nofollow" class="external text" href="http://www.itchiavari.org/chimica/tabelle/condterm.html"><span style="font-style:italic;">Coefficienti di conducibilità termica interna a temperatura ambiente</span></a>, su <span style="font-style:italic;">itchiavari.org</span>.</cite></li> <li>(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://hyperphysics.phy-astr.gsu.edu/hbase/tables/thrcn.html#c1">Conducibilità termica di alcuni sostanze</a> (Hyperphysics, Georgia State University, USA)</li> <li>(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://web.archive.org/web/20081006105349/http://www.kayelaby.npl.co.uk/general_physics/2_3/2_3_7.html">Tavole di conducibilità termica</a> (Kaye & Laby, National Physical Laboratory, UK)</li> <li><cite class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="http://pubs.acs.org/doi/abs/10.1021/ie50488a017"><span style="font-style:italic;">IEC</span></a>, su <span style="font-style:italic;">pubs.acs.org</span>.</cite></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r140554517"><span class="chiarimento" title="A volte può capitare che un link presente su Wikipedia non sia più raggiungibile. 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