{"id":103300,"date":"2024-07-18T07:40:53","date_gmt":"2024-07-18T05:40:53","guid":{"rendered":"https:\/\/www.linseis.com\/sem-categoria\/o-que-significa-a-condutividade-termica\/"},"modified":"2026-01-12T09:42:51","modified_gmt":"2026-01-12T08:42:51","slug":"o-que-significa-a-condutividade-termica","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/pt-pt\/conhecimentos\/o-que-significa-a-condutividade-termica\/","title":{"rendered":"O que significa a condutividade t\u00e9rmica?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"103300\" class=\"elementor elementor-103300 elementor-10305\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9eb8745 e-flex e-con-boxed e-con e-parent\" data-id=\"9eb8745\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5f69a51 elementor-toc--minimized-on-tablet elementor-invisible elementor-widget elementor-widget-table-of-contents\" data-id=\"5f69a51\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;],&quot;exclude_headings_by_selector&quot;:[],&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;marker_view&quot;:&quot;numbers&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h4 class=\"elementor-toc__header-title\">\n\t\t\t\t\u00cdndice\t\t\t<\/h4>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__5f69a51\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__5f69a51\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__5f69a51\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ffaef65 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"ffaef65\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Em geral, a condutividade t\u00e9rmica da express\u00e3o \u00e9 a quantidade de calor que flui atrav\u00e9s de um cubo de 1x1x1m de um material em 1 segundo se houver um gradiente de temperatura de exatamente 1 K entre dois lados opostos.<br>Isto faz da condutividade t\u00e9rmica uma propriedade carater\u00edstica do material com o seu pr\u00f3prio s\u00edmbolo (\u03bb &#8211; &#8220;lambda&#8221;) e a sua pr\u00f3pria unidade SI W \/ mK. O seu valor rec\u00edproco \u00e9 a resist\u00eancia t\u00e9rmica espec\u00edfica. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e4fd176 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"e4fd176\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Defini\u00e7\u00e3o cient\u00edfica<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-00709c7 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"00709c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A defini\u00e7\u00e3o cient\u00edfica de condutividade t\u00e9rmica afirma-a como a propriedade material que descreve o transporte de calor dentro de uma amostra. Para cada temperatura da amostra, \u00e9 obtida a partir do produto da densidade, da difusividade t\u00e9rmica e da capacidade t\u00e9rmica espec\u00edfica a essa temperatura (equa\u00e7\u00e3o 1) e pode ser descrita como o quociente negativo da densidade do fluxo de calor e do gradiente de temperatura (equa\u00e7\u00e3o 2). O exemplo da (equa\u00e7\u00e3o 3) serve de ilustra\u00e7\u00e3o.     <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3579fe elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"e3579fe\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>\u03bb = \u03c1 * cp * \u03b1 (1)<br><br>\u03bb = condutividade t\u00e9rmica, \u03c1 = densidade, cp = capacidade t\u00e9rmica espec\u00edfica, \u03b1 = difusividade t\u00e9rmica <br><br>\u03bb = -q \/ \u2206T (2)<br><br>\u03bb = condutividade t\u00e9rmica, q = densidade m\u00e9dia do fluxo de calor, \u2206T = gradiente de temperatura<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a0441a3 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a0441a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Se esta defini\u00e7\u00e3o for utilizada para considerar uma amostra cil\u00edndrica, por exemplo, podem ser efectuados os seguintes c\u00e1lculos: Se se considerar um cilindro ideal homog\u00e9neo de comprimento l e sec\u00e7\u00e3o transversal A constante, isolado lateralmente e que s\u00f3 pode sofrer uma varia\u00e7\u00e3o de temperatura nas suas duas extremidades, o gradiente de temperatura ao longo do seu comprimento \u00e9 (\u2206T) \/ l. A densidade do fluxo de calor na dire\u00e7\u00e3o do lado quente para o lado frio \u00e9 <strong>\u03bb<\/strong> * (\u2206T) \/ l.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ec40c41 elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"ec40c41\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Se considerarmos a sec\u00e7\u00e3o transversal A, existe um <a href=\"https:\/\/www.linseis.com\/messgroessen\/waermestrom\/\">\n  <strong>fluxo de calor Q<\/strong>\n<\/a>que pode ser calculado atrav\u00e9s da (equa\u00e7\u00e3o 3):<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-833aa4c elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"833aa4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Q = (A * \u03bb * \u2206T) \/ l (3)<br><br>\u03bb = condutividade t\u00e9rmica, Q = fluxo de calor, \u2206T = gradiente de temperatura, A = sec\u00e7\u00e3o transversal, l = comprimento<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-26f20eb elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"26f20eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Medi\u00e7\u00e3o da condutividade t\u00e9rmica (m\u00e9todos):<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-16299ff e-con-full e-flex e-con e-child\" data-id=\"16299ff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-604b7b0 e-con-full e-flex e-con e-child\" data-id=\"604b7b0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1dca64d elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"1dca64d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Os m\u00e9todos de medi\u00e7\u00e3o para determinar a condutividade t\u00e9rmica s\u00e3o variados, mas podem ser categorizados em dois grupos b\u00e1sicos para uma melhor vis\u00e3o geral: <strong>m\u00e9todos de medi\u00e7\u00e3o transientes e estacion\u00e1rios<\/strong>.<\/p><p>No nosso v\u00eddeo, os nossos dois cientistas explicam a diferen\u00e7a entre estes m\u00e9todos.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5ec91c4 e-con-full e-flex e-con e-child\" data-id=\"5ec91c4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34d22ea elementor-widget elementor-widget-video\" data-id=\"34d22ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/jylkWNrZvLs&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c55e164 elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"c55e164\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\tSe um material for aquecido localmente, a distribui\u00e7\u00e3o de temperatura dentro do corpo muda at\u00e9 ficar uniformemente distribu\u00edda e est\u00e1vel ap\u00f3s um certo tempo. A fase logo ap\u00f3s o in\u00edcio da entrada de calor, na qual a distribui\u00e7\u00e3o de temperatura ainda est\u00e1 a mudar, \u00e9 chamada de fase transit\u00f3ria. Uma distribui\u00e7\u00e3o de temperatura est\u00e1vel \u00e9 designada por estado estacion\u00e1rio.  \t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a25086 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"9a25086\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9todos de medi\u00e7\u00e3o estacion\u00e1rios<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a1f545e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a1f545e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>como o processo de placa &#8220;<a href=\"https:\/\/www.linseis.com\/methoden\/guarded-hot-plate-ghp\/\" data-auto-event-observed=\"true\">\n  <strong>Chapa quente protegida<\/strong>\n<\/a>&#8220;, o &#8220;<a href=\"https:\/\/www.linseis.com\/messgeraete\/waermeleitfaehigkeit\/hfm-l57\/\" data-auto-event-observed=\"true\">\n  <strong>Medidor de fluxo de calor<\/strong>\n<\/a><b>\n  <u>r<\/u>\n<\/b>&#8220;, ou o &#8220;<a href=\"https:\/\/www.linseis.com\/messgeraete\/waermeleitfaehigkeit\/tim-l58\/\" data-auto-event-observed=\"true\">\n  <strong>Testador de Material de Interface T\u00e9rmica<\/strong>\n<\/a>&#8221; pertencem aos m\u00e9todos de medi\u00e7\u00e3o estacion\u00e1rios.<\/p><p>A amostra de material \u00e9 colocada entre uma placa aquecida e uma placa arrefecida. Isto resulta num gradiente de temperatura e, consequentemente, tamb\u00e9m num fluxo de calor ao longo da amostra, que \u00e9 monitorizado at\u00e9 se aproximar de um valor final constante. <\/p><p>Se a espessura da amostra e o fluxo de calor medido forem conhecidos, a condutividade t\u00e9rmica da amostra pode ser calculada. Com o aparelho de teste TIM, a resist\u00eancia t\u00e9rmica pode ser medida sob carga ou compress\u00e3o vari\u00e1vel e a condutividade t\u00e9rmica e a resist\u00eancia t\u00e9rmica de contacto podem ser determinadas a partir da\u00ed. <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3fa3614 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"3fa3614\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">M\u00e9todos de medi\u00e7\u00e3o de transientes<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f8e951 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"5f8e951\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"212\" data-end=\"863\">Um exemplo bem conhecido de processos transit\u00f3rios \u00e9 o <strong data-start=\"268\" data-end=\"293\">processo de flash a laser<\/strong> &#8211; um cl\u00e1ssico que existe desde 1975 e que ainda hoje \u00e9 utilizado em todo o mundo. A raz\u00e3o: apesar dos seus elevados custos e complexidade t\u00e9cnica, fornece resultados extremamente precisos, mesmo sob condi\u00e7\u00f5es extremas de at\u00e9 <strong data-start=\"522\" data-end=\"534\">2.800 \u00b0C<\/strong>. O disco de amostra \u00e9 aquecido de um lado por um laser curto e de alta energia ou por um flash de luz. Um detetor de infravermelhos mede ent\u00e3o o aumento de temperatura no lado oposto. Em combina\u00e7\u00e3o com a espessura da amostra, a <strong data-start=\"816\" data-end=\"843\">difusividade t\u00e9rmica<\/strong> pode ser calculada utilizando um modelo de condutividade t\u00e9rmica.    <\/p><p data-start=\"865\" data-end=\"1410\"><strong data-start=\"870\" data-end=\"909\">Os m\u00e9todos do fio de aquecimento e da tira de aquecimento<\/strong> (por exemplo, o m\u00e9todo da ponte quente transiente) tamb\u00e9m pertencem \u00e0s t\u00e9cnicas transientes. S\u00e3o flex\u00edveis, podem ser utilizados numa grande variedade de configura\u00e7\u00f5es de sensores e, por conseguinte, abrangem uma vasta gama de medi\u00e7\u00e3o. Um fio de aquecimento embutido num substrato emite constantemente calor. A distribui\u00e7\u00e3o de temperatura resultante, dependente do tempo, na amostra e no sensor \u00e9 registada com um term\u00f3metro integrado &#8211; um indicador direto das <strong data-start=\"1355\" data-end=\"1393\">propriedades de transporte t\u00e9rmico<\/strong> do material.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ad234c7 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"ad234c7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Particularidade: Medi\u00e7\u00e3o da condutividade t\u00e9rmica em camadas finas<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3a78645 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"3a78645\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"151\" data-end=\"768\">Um caso especial \u00e9 a medi\u00e7\u00e3o da condutividade t\u00e9rmica em <strong data-start=\"214\" data-end=\"265\">camadas finas na gama dos nan\u00f3metros a micr\u00f3metros<\/strong>. Embora estas medi\u00e7\u00f5es se baseiem parcialmente nos mesmos princ\u00edpios b\u00e1sicos que para as amostras s\u00f3lidas, a <g id=\"gid_1\">aplica\u00e7\u00e3o pr\u00e1tica difere significativamente<\/g>. Em vez do m\u00e9todo cl\u00e1ssico de flash laser, por exemplo, \u00e9 aqui utilizada <strong data-start=\"499\" data-end=\"539\">a termorreflect\u00e2ncia no dom\u00ednio do tempo (TDTR)<\/strong>, enquanto o <strong data-start=\"565\" data-end=\"584\">m\u00e9todo 3-omega<\/strong> \u00e9 uma forma especializada do m\u00e9todo da tira de aquecimento. Estas adapta\u00e7\u00f5es s\u00e3o necess\u00e1rias para captar de forma fi\u00e1vel as condi\u00e7\u00f5es de fronteira especiais das camadas ultrafinas.   <\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e15a843 elementor-widget elementor-widget-spacer\" data-id=\"e15a843\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ac0ae57 e-flex e-con-boxed e-con e-parent\" data-id=\"ac0ae57\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Em geral, a express\u00e3o condutividade t\u00e9rmica \u00e9 a quantidade de calor que flui atrav\u00e9s de um cubo de 1x1x1m de um material em 1 segundo, se houver um gradiente de temperatura de exatamente 1 K entre dois lados opostos.<\/p>\n","protected":false},"author":3,"featured_media":31875,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[654],"tags":[],"class_list":["post-103300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-conhecimentos"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/comments?post=103300"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/posts\/103300\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media\/31875"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/media?parent=103300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/categories?post=103300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/pt-pt\/wp-json\/wp\/v2\/tags?post=103300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}