{"id":41297,"date":"2024-07-22T10:17:07","date_gmt":"2024-07-22T08:17:07","guid":{"rendered":"https:\/\/www.linseis.com\/mesure-de-la-capacite-thermique-specifique-cp-par-la-methode-du-fil-chauffant-transitoire\/"},"modified":"2025-08-06T14:29:45","modified_gmt":"2025-08-06T12:29:45","slug":"mesure-de-la-capacite-thermique-specifique-cp-par-la-methode-du-fil-chauffant-transitoire","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/fr\/connaissance\/mesure-de-la-capacite-thermique-specifique-cp-par-la-methode-du-fil-chauffant-transitoire\/","title":{"rendered":"Mesure de la capacit\u00e9 thermique sp\u00e9cifique (cp) par la m\u00e9thode du fil chauffant transitoire"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"41297\" class=\"elementor elementor-41297 elementor-15038\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9eb8745 e-flex e-con-boxed elementor-invisible e-con e-parent\" data-id=\"9eb8745\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;animation&quot;:&quot;fadeInUp&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-be9105e elementor-widget elementor-widget-text-editor\" data-id=\"be9105e\" data-element_type=\"widget\" data-e-type=\"widget\" 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>La capacit\u00e9 calorifique sp\u00e9cifique est une propri\u00e9t\u00e9 thermophysique fondamentale des mat\u00e9riaux et elle est utile pour l&rsquo;\u00e9valuation des mat\u00e9riaux et de leurs domaines d&rsquo;application.<br \/>Elle peut \u00eatre d\u00e9termin\u00e9e \u00e0 l&rsquo;aide de la <a href=\"https:\/\/www.linseis.com\/fr\/produits\/analyse-thermique\/dsc-differential-scanning-calorimetry\/\"><strong>calorim\u00e9trie diff\u00e9rentielle \u00e0 balayage (DSC)<\/strong><\/a>.<\/p><p>Une autre fa\u00e7on de d\u00e9terminer la capacit\u00e9 thermique sp\u00e9cifique est d&rsquo;utiliser la m\u00e9thode du fil chauffant transitoire (<a href=\"https:\/\/www.astm.org\/c1113_c1113m-09r19.html\" target=\"_blank\" rel=\"noopener\"><strong>ASTM C1113-99<\/strong><\/a>).<br \/>La m\u00e9thode d\u00e9pendante du temps fournit des r\u00e9sultats exacts et pr\u00e9cis pour la d\u00e9termination des param\u00e8tres thermophysiques <a href=\"https:\/\/www.linseis.com\/fr\/proprietes\/conductivite-thermique\/\"><strong>conductivit\u00e9 thermique \u03bb<\/strong><\/a>, <a href=\"https:\/\/www.linseis.com\/fr\/proprietes\/diffusivite-thermique\/\"><strong>la diffusivit\u00e9 thermique a<\/strong><\/a> et <a href=\"https:\/\/www.linseis.com\/fr\/proprietes\/capacite-thermique-specifique\/\"><strong>la capacit\u00e9 thermique sp\u00e9cifique cp<\/strong><\/a> des gaz et des liquides.<br \/>L&rsquo;augmentation de temp\u00e9rature est mesur\u00e9e dans un \u00e9chantillon qui est chauff\u00e9 par un mince fil chauffant \u00e0 une distance connue.<br \/>Le fil sert de source de chaleur Joule et en m\u00eame temps de thermom\u00e8tre \u00e0 r\u00e9sistance.<br \/>Lorsque la temp\u00e9rature augmente, la r\u00e9sistance du fil change et peut donc \u00eatre utilis\u00e9e pour mesurer la temp\u00e9rature.<\/p><p>D\u00e8s 1931, St\u00e5lhane et Pyk avaient mesur\u00e9 la conductivit\u00e9 thermique de poudres \u00e0 l&rsquo;aide d&rsquo;un appareil tr\u00e8s similaire \u00e0 la m\u00e9thode actuelle ; ils avaient trouv\u00e9 la relation empirique suivante :<\/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-eac9a92 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"eac9a92\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"577\" height=\"248\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-ENG.png\" class=\"attachment-large size-large wp-image-37520\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-ENG.png 577w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-ENG-300x129.png 300w\" sizes=\"(max-width: 577px) 100vw, 577px\" \/>\t\t\t\t\t\t\t\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-33229bc elementor-widget elementor-widget-text-editor\" data-id=\"33229bc\" data-element_type=\"widget\" data-e-type=\"widget\" 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>En tenant compte de l&rsquo;\u00e9quation de la conduction thermique, la temp\u00e9rature <em>T<\/em> \u00e0 une distance <em>r<\/em> du fil \u00e0 un moment pr\u00e9cis <em>t<\/em> peut \u00eatre calcul\u00e9e comme suit pour le fil chauffant en tant que source de chaleur lin\u00e9aire :<\/p>\n\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-1c3873f elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"1c3873f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"476\" height=\"89\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-ENG.png\" class=\"attachment-large size-large wp-image-37509\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-ENG.png 476w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-ENG-300x56.png 300w\" sizes=\"(max-width: 476px) 100vw, 476px\" \/>\t\t\t\t\t\t\t\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-71e5f71 elementor-widget elementor-widget-text-editor\" data-id=\"71e5f71\" data-element_type=\"widget\" data-e-type=\"widget\" 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><span style=\"text-decoration: underline;\">\u00c9quation 2<\/span><\/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-71398e8 elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"71398e8\" data-element_type=\"widget\" data-e-type=\"widget\" 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>Cela permet de calculer la conductivit\u00e9 thermique <em>\u03bb<\/em> \u00e0 partir du changement de temp\u00e9rature \u00e0 deux moments diff\u00e9rents <em><sub>t1<\/sub><\/em> et <em><sub>t2<\/sub><\/em> (\u00e9quation 3) :<\/p>\n\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-c93723c elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"c93723c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"95\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-2-300x95-1.png\" class=\"attachment-large size-large wp-image-15096\" alt=\"\" \/>\t\t\t\t\t\t\t\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-256e8e9 elementor-widget elementor-widget-text-editor\" data-id=\"256e8e9\" data-element_type=\"widget\" data-e-type=\"widget\" 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><span style=\"text-decoration: underline;\">\u00c9quation 3<\/span><\/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-1f62fdd elementor-widget__width-initial elementor-widget elementor-widget-text-editor\" data-id=\"1f62fdd\" data-element_type=\"widget\" data-e-type=\"widget\" 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>La conductivit\u00e9 thermique <em>\u03bb<\/em>, la diffusivit\u00e9 thermique, la capacit\u00e9 thermique sp\u00e9cifique <em><sub>cp<\/sub><\/em> et la densit\u00e9 <em>\u03c1<\/em> sont li\u00e9es comme suit,<\/p>\n\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-b2cb2c6 elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"b2cb2c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"483\" height=\"87\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-3.png\" class=\"attachment-large size-large wp-image-15109\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-3.png 483w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-3-300x54.png 300w\" sizes=\"(max-width: 483px) 100vw, 483px\" \/>\t\t\t\t\t\t\t\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-3f23e24 elementor-widget elementor-widget-text-editor\" data-id=\"3f23e24\" data-element_type=\"widget\" data-e-type=\"widget\" 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>la capacit\u00e9 thermique sp\u00e9cifique c<em><sub>p<\/sub><\/em> peut \u00eatre d\u00e9termin\u00e9e \u00e0 l&rsquo;aide de l&rsquo;\u00e9quation 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-fca354a elementor-widget__width-initial elementor-widget elementor-widget-image\" data-id=\"fca354a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"324\" height=\"80\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-4.png\" class=\"attachment-large size-large wp-image-15119\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-4.png 324w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Cp-THB-Formel-Temperaturleitfaehigkeit-Dichte-4-300x74.png 300w\" sizes=\"(max-width: 324px) 100vw, 324px\" \/>\t\t\t\t\t\t\t\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-2cbc2e6 elementor-widget elementor-widget-heading\" data-id=\"2cbc2e6\" data-element_type=\"widget\" data-e-type=\"widget\" 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\u00e9thode du pont chaud transitoire (THB)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-681528f elementor-widget elementor-widget-text-editor\" data-id=\"681528f\" data-element_type=\"widget\" data-e-type=\"widget\" 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>La m\u00e9thode du fil chauffant transitoire a \u00e9t\u00e9 perfectionn\u00e9e. <a href=\"https:\/\/www.linseis.com\/fr\/service-et-assistance\/methodes-danalyse-thermique\/pont-chaud-transitoire-thb\/\"><strong>pont chauffant transitoire<\/strong><\/a> de l&rsquo;Institut f\u00e9d\u00e9ral physico-technique de Brunswick (Allemagne), qui a \u00e9t\u00e9 pr\u00e9sent\u00e9 sur le march\u00e9 europ\u00e9en en 2005 (voir <a href=\"https:\/\/www.linseis.com\/fr\/produits\/conductivite-thermique\/thb-l56\/\"><strong>THB L56<\/strong><\/a>).<\/p><p>Le capteur multibrevet\u00e9 est l&rsquo;\u00e9l\u00e9ment cl\u00e9.<br \/>Alors qu&rsquo;une seule bande chauffante est utilis\u00e9e avec la m\u00e9thode du fil chauffant, <strong>le THB utilise quatre bandes chauffantes sinueuses<\/strong>.<br \/>La division transversale asym\u00e9trique de chaque bande et les diff\u00e9rentes distances entre les bandes, en conjonction avec un circuit de pont de Wheatstone, permettent une compensation efficace des erreurs de mesure syst\u00e9matiques significatives.<\/p><p>La <strong>m\u00e9thode du pont chaud transitoire<\/strong> en fonction du temps <strong>permet de<\/strong> mesurer simultan\u00e9ment les<strong> propri\u00e9t\u00e9s thermophysiques \u03bb, a et cp<\/strong> de nombreux mat\u00e9riaux et g\u00e9om\u00e9tries.<br \/>La m\u00e9thode fournit des r\u00e9sultats pour les solides et les liquides, ainsi que pour les poudres et les p\u00e2tes, avec une grande pr\u00e9cision de mesure et en peu de temps.<\/p><p>Le domaine d&rsquo;application est vaste, de sorte que la m\u00e9thode de mesure est utilis\u00e9e, entre autres, pour \u00e9valuer les mat\u00e9riaux de stockage de la chaleur et les mat\u00e9riaux isolants, ainsi que pour analyser <a href=\"https:\/\/www.linseis.com\/fr\/votre-industrie\/semi-conducteurs-et-electronique\/\"><strong>composants \u00e9lectroniques<\/strong><\/a> et les mat\u00e9riaux utilis\u00e9s en <a href=\"https:\/\/www.linseis.com\/fr\/votre-industrie\/technologie-des-couches-minces\/\"><strong>nanotechnologie<\/strong><\/a>.<\/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-7703270 elementor-widget elementor-widget-spacer\" data-id=\"7703270\" 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\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>La capacit\u00e9 calorifique sp\u00e9cifique est une propri\u00e9t\u00e9 thermophysique fondamentale des mat\u00e9riaux et est utile pour \u00e9valuer les mat\u00e9riaux et leurs domaines d&rsquo;application.<br \/>\nElle peut \u00eatre d\u00e9termin\u00e9e \u00e0 l&rsquo;aide de la calorim\u00e9trie dynamique \u00e0 balayage diff\u00e9rentiel (DSC). <\/p>\n","protected":false},"author":3,"featured_media":15046,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[187],"tags":[],"class_list":["post-41297","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-connaissance"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts\/41297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/comments?post=41297"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts\/41297\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media\/15046"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media?parent=41297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/categories?post=41297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/tags?post=41297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}