{"id":41286,"date":"2024-07-22T12:02:12","date_gmt":"2024-07-22T10:02:12","guid":{"rendered":"https:\/\/www.linseis.com\/comment-fonctionne-un-dilatometre-a-tige-de-poussee\/"},"modified":"2025-08-06T14:27:42","modified_gmt":"2025-08-06T12:27:42","slug":"comment-fonctionne-un-dilatometre-a-tige-de-poussee","status":"publish","type":"post","link":"https:\/\/www.linseis.com\/fr\/connaissance\/comment-fonctionne-un-dilatometre-a-tige-de-poussee\/","title":{"rendered":"Comment fonctionne un dilatom\u00e8tre \u00e0 piston poussoir ?"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"41286\" class=\"elementor elementor-41286 elementor-15685\" 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-86665e8 elementor-toc--minimized-on-tablet elementor-invisible elementor-widget elementor-widget-table-of-contents\" data-id=\"86665e8\" 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;_animation_delay&quot;:250,&quot;no_headings_message&quot;:&quot;Aucun titre n\\u2019a \\u00e9t\\u00e9 trouv\\u00e9 sur cette 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\tTable des mati\u00e8res\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__86665e8\" aria-expanded=\"true\" aria-label=\"Ouvrir la table des mati\u00e8res\"><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__86665e8\" aria-expanded=\"true\" aria-label=\"Fermer la table des mati\u00e8res\"><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__86665e8\" 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;,&quot;_animation_delay&quot;:250}\" 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>Un dilatom\u00e8tre est un appareil de mesure permettant d&rsquo;enregistrer la dilatation thermique d&rsquo;un \u00e9chantillon de mat\u00e9riau.<br \/>Les coefficients de dilatation thermique (<a href=\"https:\/\/www.linseis.com\/fr\/connaissance\/determination-de-la-densite-cte\/\"><strong>CTE = coefficient d&rsquo;expansion thermique<\/strong><\/a>) sont calcul\u00e9s \u00e0 partir des r\u00e9sultats des mesures.<br \/>Cette grandeur physique du mat\u00e9riau indique la variation relative de la longueur de l&rsquo;\u00e9chantillon en fonction d&rsquo;un changement de temp\u00e9rature (unit\u00e9 de mesure [1 \/ K]).<br \/>Les valeurs du CTE d\u00e9pendent de la temp\u00e9rature et se situent pour les substances solides dans la plage de quelques millioni\u00e8mes par Kelvin.<br \/>Les variations de longueur absolues attendues des \u00e9chantillons sont donc tr\u00e8s faibles et afin d&rsquo;obtenir des r\u00e9sultats fiables, il faut un appareil de mesure tr\u00e8s pr\u00e9cis.<\/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-de61301 elementor-widget__width-initial elementor-invisible elementor-widget elementor-widget-image\" data-id=\"de61301\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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=\"800\" height=\"416\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schubstange-mit-Probe-Pushrod-with-sample-eines-Dilatometers-1170x608-1-1024x532.png\" class=\"attachment-large size-large wp-image-15689\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schubstange-mit-Probe-Pushrod-with-sample-eines-Dilatometers-1170x608-1-1024x532.png 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schubstange-mit-Probe-Pushrod-with-sample-eines-Dilatometers-1170x608-1-300x156.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schubstange-mit-Probe-Pushrod-with-sample-eines-Dilatometers-1170x608-1-768x399.png 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schubstange-mit-Probe-Pushrod-with-sample-eines-Dilatometers-1170x608-1.png 1170w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\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-a98df7e elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"a98df7e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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\">Types de dilatom\u00e8tres<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-97a947b elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"97a947b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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\">Fonction du dilatom\u00e8tre \u00e0 tige de pouss\u00e9e<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-937c6b9 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"937c6b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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 nature de l&rsquo;\u00e9chantillon et la plage de temp\u00e9rature \u00e0 \u00e9tudier d\u00e9terminent les exigences auxquelles le porte-\u00e9chantillon doit r\u00e9pondre.<br \/>Pour les substances solides qui ne subissent pas de fusion dans la plage de temp\u00e9rature de mesure, un dilatom\u00e8tre \u00e0 piston poussoir convient tr\u00e8s bien.<\/p><p>Le comportement des mat\u00e9riaux chauff\u00e9s jusqu&rsquo;au point de ramollissement ou de fusion peut \u00eatre d\u00e9termin\u00e9 optiquement \u00e0 l&rsquo;aide d&rsquo;un dilatom\u00e8tre optique ou d&rsquo;un microscope chauffant.<br \/>Un autre dispositif exp\u00e9rimental repose sur l&rsquo;utilisation de jauges de contrainte coll\u00e9es sur toute la surface de l&rsquo;\u00e9chantillon et \u00e9valu\u00e9es \u00e0 l&rsquo;aide d&rsquo;un pont de mesure de la r\u00e9sistance.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d40c3d6 e-con-full e-flex e-con e-child\" data-id=\"d40c3d6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-b90f3aa e-con-full e-flex e-con e-child\" data-id=\"b90f3aa\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-978c53f elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"978c53f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Le <a href=\"https:\/\/www.linseis.com\/fr\/produits\/dilatometrie\/\"><strong>dilatom\u00e8tre \u00e0 poussoir<\/strong><\/a> se compose d&rsquo;un four (\u00e0 droite sur l&rsquo;image), du porte-\u00e9chantillon (au centre de l&rsquo;image) et du capteur de d\u00e9placement (capteur LVDT \u00e0 gauche sur l&rsquo;image).<\/p><p>L&rsquo;\u00e9chantillon est plac\u00e9 dans un tube en silice fondue ou en c\u00e9ramique (\u00e9chantillon en rouge sur l&rsquo;image).<br \/>Il est fcontacte direct avec une tige (piston en jaune, devant l&rsquo;\u00e9chantillon rouge), qui transmet le changement de longueur au capteur de d\u00e9placement.<\/p><p>La variation totale de la longueur de l&rsquo;ensemble du syst\u00e8me de mesure est alors d\u00e9termin\u00e9e et convertie en valeurs CTE du mat\u00e9riau \u00e0 l&rsquo;aide de l&rsquo;expansion connue du porte-\u00e9chantillon et de la longueur de l&rsquo;\u00e9chantillon.<br \/>Le four permet de r\u00e9aliser toutes les courbes de temp\u00e9rature avec diff\u00e9rentes vitesses de chauffage et de refroidissement ainsi que des paliers.<\/p><p>En cons\u00e9quence, la variation de longueur de l&rsquo;\u00e9chantillon est d\u00e9termin\u00e9e en fonction de la temp\u00e9rature.<\/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-a81d810 e-con-full e-flex e-con e-child\" data-id=\"a81d810\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2a56262 elementor-invisible elementor-widget elementor-widget-image\" data-id=\"2a56262\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"671\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schema-Schubstangendilatometer-Aufbau.png\" class=\"attachment-large size-large wp-image-15715\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schema-Schubstangendilatometer-Aufbau.png 940w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schema-Schubstangendilatometer-Aufbau-300x251.png 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Schema-Schubstangendilatometer-Aufbau-768x644.png 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Structure d'un dilatom\u00e8tre \u00e0 piston poussoir, vue de dessus<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\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-3e2343a elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"3e2343a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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\">Applications du dilatom\u00e8tre \u00e0 tige pouss\u00e9e<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e3560e elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"2e3560e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Les principaux domaines d&rsquo;application du dilatom\u00e8tre sont la recherche fondamentale en science des mat\u00e9riaux et l&rsquo;assurance qualit\u00e9.\nIl permet surtout d&rsquo;enregistrer le coefficient de dilatation thermique, les temp\u00e9ratures des transitions de phase et les temp\u00e9ratures de frittage. <\/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-0c960e5 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"0c960e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">  Coefficient de dilatation thermique<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-0b4360f e-con-full e-flex e-con e-child\" data-id=\"0b4360f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8cc049d e-con-full e-flex e-con e-child\" data-id=\"8cc049d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb7c94f elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"fb7c94f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Le coefficient de dilatation thermique est un param\u00e8tre important pour le d\u00e9veloppement des composites.<br \/>Par exemple, le b\u00e9ton arm\u00e9 ne peut \u00eatre utilis\u00e9 dans la construction parce que l&rsquo;acier et le b\u00e9ton ont la m\u00eame valeur de coefficient d&rsquo;expansion thermique. <br \/>Les diff\u00e9rences de temp\u00e9rature dans les mat\u00e9riaux entra\u00eenent des contraintes m\u00e9caniques.<br \/>Les zones \u00e0 haute temp\u00e9rature se dilatent davantage que les zones plus froides.<br \/>Il est possible d&rsquo;\u00e9viter ou de r\u00e9duire ces contraintes en d\u00e9veloppant et en utilisant des mat\u00e9riaux ayant un coefficient d&rsquo;expansion tr\u00e8s faible.<\/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-ddec395 e-con-full e-flex e-con e-child\" data-id=\"ddec395\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4235ecc elementor-invisible elementor-widget elementor-widget-image\" data-id=\"4235ecc\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Bruecke-aus-Stahl-und-Beton-1024x683.jpg\" class=\"attachment-large size-large wp-image-15776\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Bruecke-aus-Stahl-und-Beton-1024x683.jpg 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Bruecke-aus-Stahl-und-Beton-300x200.jpg 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Bruecke-aus-Stahl-und-Beton-768x512.jpg 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Bruecke-aus-Stahl-und-Beton.jpg 1168w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Lors de la construction de ponts, le coefficient d'expansion thermique est un facteur de s\u00e9curit\u00e9 important, afin que le pont ne s'effondre pas quand il y a  des variations de temp\u00e9rature<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\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-bf45a01 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"bf45a01\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">  Transitions de phase<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d0911ab e-con-full e-flex e-con e-child\" data-id=\"d0911ab\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-84b1450 e-con-full e-flex e-con e-child\" data-id=\"84b1450\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fad0cd5 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"fad0cd5\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Les propri\u00e9t\u00e9s macroscopiques des solides cristallins d\u00e9pendent directement de la structure cristalline elle-m\u00eame.<\/p><p>Cependant, la plupart des mat\u00e9riaux peuvent \u00eatre pr\u00e9sents sous plusieurs modifications et pr\u00e9sentent donc, outre la temp\u00e9rature de fusion et d&rsquo;\u00e9vaporation, des transitions de phase qui d\u00e9pendent de la pression et de la temp\u00e9rature, au cours desquelles l&rsquo;\u00e9tat solide ne change pas.<\/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-12b79ed e-con-full e-flex e-con e-child\" data-id=\"12b79ed\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1ebee9e elementor-invisible elementor-widget elementor-widget-image\" data-id=\"1ebee9e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"531\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Phasenumwandlungen-bei-Quarzkristallen-1024x680.jpg\" class=\"attachment-large size-large wp-image-15796\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Phasenumwandlungen-bei-Quarzkristallen-1024x680.jpg 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Phasenumwandlungen-bei-Quarzkristallen-300x199.jpg 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Phasenumwandlungen-bei-Quarzkristallen-768x510.jpg 768w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Phasenumwandlungen-bei-Quarzkristallen.jpg 1228w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">Les transformations de phase, par exemple dans un verre de quartz, peuvent \u00eatre visualis\u00e9es par une mesure au dilatom\u00e8tre.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\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-3aed0c0 elementor-widget elementor-widget-spacer\" data-id=\"3aed0c0\" 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<div class=\"elementor-element elementor-element-9acd785 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"9acd785\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Cependant, la transition de phase d&rsquo;une phase cristalline \u00e0 une autre, ainsi que le processus de cristallisation lui-m\u00eame, sont souvent clairement visibles dans la courbe du coefficient d&rsquo;expansion en fonction de la temp\u00e9rature, et peuvent donc \u00eatre tr\u00e8s bien repr\u00e9sent\u00e9s par la mesure au dilatom\u00e8tre.<\/p><p>M\u00eame les transitions de phase rapides ou celles qui n\u00e9cessitent une pression de contact d\u00e9finie, comme la conversion de la martensite, de la ferrite ou de l&rsquo;aust\u00e9nite dans les aciers, peuvent \u00eatre d\u00e9tect\u00e9es \u00e0 l&rsquo;aide du dilatom\u00e8tre modifi\u00e9 en cons\u00e9quence.<\/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-10e5814 elementor-invisible elementor-widget elementor-widget-heading\" data-id=\"10e5814\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Temp\u00e9ratures de frittage<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a713775 e-con-full e-flex e-con e-child\" data-id=\"a713775\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-bf00326 e-con-full e-flex e-con e-child\" data-id=\"bf00326\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a5042f7 elementor-invisible elementor-widget elementor-widget-text-editor\" data-id=\"a5042f7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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>Le frittage d&rsquo;un corps vert pr\u00e9form\u00e9 d&rsquo;une poudre c\u00e9ramique ou m\u00e9tallique consiste dans une cuisson \u00e0 des temp\u00e9ratures et des pressions pr\u00e9cises.<br \/>Dans la pratique, ce processus est connu, par exemple, dans l&rsquo;industrie de la porcelaine.<br \/>Le m\u00e9lange poudreux de kaolin (argile blanche), de feldspath et de quartz est fritt\u00e9 au cours du processus de cuisson et devient ainsi plus robuste.<\/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-446d3cb e-con-full e-flex e-con e-child\" data-id=\"446d3cb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-82d216c elementor-invisible elementor-widget elementor-widget-image\" data-id=\"82d216c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;fadeInUp&quot;,&quot;_animation_delay&quot;:250}\" 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<figure class=\"wp-caption\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"534\" src=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Sinteringprozess-Porzellantassen-vor-dem-Brennen-1024x683-1.jpg\" class=\"attachment-large size-large wp-image-15804\" alt=\"\" srcset=\"https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Sinteringprozess-Porzellantassen-vor-dem-Brennen-1024x683-1.jpg 1024w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Sinteringprozess-Porzellantassen-vor-dem-Brennen-1024x683-1-300x200.jpg 300w, https:\/\/www.linseis.com\/wp-content\/uploads\/2024\/07\/Sinteringprozess-Porzellantassen-vor-dem-Brennen-1024x683-1-768x512.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" \/>\t\t\t\t\t\t\t\t\t\t\t<figcaption class=\"widget-image-caption wp-caption-text\">La d\u00e9termination des temp\u00e9ratures optimales pour les diff\u00e9rentes \u00e9tapes de frittage peut \u00eatre effectu\u00e9e sur la base de la courbe fournie par le dilatom\u00e8tre.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Un dilatom\u00e8tre est un appareil de mesure permettant d&rsquo;enregistrer la dilatation thermique d&rsquo;un \u00e9chantillon de mat\u00e9riau.<br \/>\nLe coefficient de dilatation thermique (CTE = Coefficient de dilatation thermique) est calcul\u00e9 \u00e0 partir des r\u00e9sultats de la mesure. <\/p>\n","protected":false},"author":3,"featured_media":70858,"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-41286","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\/41286","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=41286"}],"version-history":[{"count":0,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/posts\/41286\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media\/70858"}],"wp:attachment":[{"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/media?parent=41286"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/categories?post=41286"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linseis.com\/fr\/wp-json\/wp\/v2\/tags?post=41286"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}