{"id":5508,"date":"2022-12-19T16:44:15","date_gmt":"2022-12-19T15:44:15","guid":{"rendered":"http:\/\/dalloz-stones.com\/loxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/"},"modified":"2025-07-25T11:32:09","modified_gmt":"2025-07-25T09:32:09","slug":"oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset","status":"publish","type":"post","link":"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/","title":{"rendered":"L\u2019oxyde de zirconium (CZ) et son proc\u00e9d\u00e9 de synth\u00e8se par croissance en autocreuset"},"content":{"rendered":"

L\u2019oxyde de zirconium synth\u00e9tique diff\u00e8re d\u2019un produit artificiel<\/strong> (produit fabriqu\u00e9 par l\u2019Homme ne poss\u00e9dant aucun \u00e9quivalent naturel connu). Cette mati\u00e8re est qualifiable de synth\u00e9tique<\/strong> car il existe une gemme naturelle \u00e9quivalente appel\u00e9e baddeleyite<\/strong>.<\/p>

Le zirconium cubique est synth\u00e9tis\u00e9 gr\u00e2ce \u00e0 un proc\u00e9d\u00e9 unique : la synth\u00e8se par croissance en autocreuset.<\/strong><\/p>

La croissance en autocreuset<\/h2>

En 1964, la technique de synth\u00e8se par croissance en autocreuset a \u00e9t\u00e9 con\u00e7ue pour la fabrication d\u2019oxyde de zirconium synth\u00e9tique<\/strong> (CZ ou \u00ab Cubic Zirconia \u00bb). Ce proc\u00e9d\u00e9, invent\u00e9 par des scientifiques fran\u00e7ais, donne lieu \u00e0 la commercialisation de l\u2019oxyde de zirconium en 1973.<\/strong><\/p>

Il est depuis consid\u00e9r\u00e9 en bijouterie comme une excellente imitation du diamant<\/strong> et des pierres de couleur.<\/p>

Fonctionnement<\/h2>

Une temp\u00e9rature avoisinant les 2750\u00b0C<\/strong> est n\u00e9cessaire pour la cristallisation<\/strong> du CZ. Cette temp\u00e9rature est si \u00e9lev\u00e9e qu\u2019aucun mat\u00e9riau ne peut y r\u00e9sister, hormis l\u2019oxyde de zirconium lui-m\u00eame.<\/p>

Une c\u00e9ramique \u00e0 base d\u2019oxyde de zirconium pr\u00e9alablement fondue puis solidifi\u00e9e sert alors de r\u00e9cipient (creuset). Une poudre de CZ<\/strong> y est introduite. L\u2019enceinte est chauff\u00e9e par \u00e9nergie radio- fr\u00e9quente,<\/strong> fondant uniquement le contenu du r\u00e9cipient. Un circuit d\u2019eau refroidit le creuset pour le garder sous forme solide.<\/p>

Il est n\u00e9cessaire d\u2019ajouter \u00e0 la pr\u00e9paration 10 \u00e0 15% d\u2019oxyde d\u2019yttrium ou d\u2019oxyde de calcium afin de stabiliser la cristallisation du CZ.<\/strong><\/p>

La mati\u00e8re introduite cr\u00e9\u00e9e des germes (cristaux amorces)<\/strong> puis cristallise en oxyde de zirconium synth\u00e9tique.<\/strong> Ces cristaux poussent de bas en haut sous forme de colonnes.<\/strong> L\u2019appareil est abaiss\u00e9 petit \u00e0 petit par rapport au syst\u00e8me de chauffage. Ensuite, les bruts sont r\u00e9cup\u00e9r\u00e9s, pr\u00eats \u00e0 \u00eatre taill\u00e9s.<\/strong><\/p>

\"\"<\/figure>

L\u2019oxyde de zirconium synth\u00e9tique est une mati\u00e8re tr\u00e8s pure et d\u00e9clinable<\/strong> en une grande vari\u00e9t\u00e9 de couleurs<\/strong> selon l\u2019\u00e9l\u00e9ment chromog\u00e8ne introduit pendant le processus.<\/p>

Le CZ peut \u00eatre transparent \u00e0 opaque. C\u2019est une mati\u00e8re facile \u00e0 manipuler car r\u00e9sistante \u00e0 la chaleur<\/strong> et d\u2019une bonne duret\u00e9<\/strong> : 8,5 sur l\u2019\u00e9chelle de Mohs (raye la topaze, est ray\u00e9 par le corindon).<\/p>

Il poss\u00e8de une brillance et une dispersion proche du diamant<\/strong>, ce qui en fait la meilleure imitation existante de ce mat\u00e9riau d\u2019exception.<\/p>

La densit\u00e9 du CZ varie entre 5,60 et 6,00 (diamant = 3,52). C\u2019est une pierre tr\u00e8s dense<\/strong> ce qui en fait sa principale diff\u00e9rence avec les pierres naturelles. Cette propri\u00e9t\u00e9 est utilis\u00e9e notamment en gemmologie pour son identification.<\/p>

\"\"<\/figure>

Envie d\u2019en savoir plus ? Plongez dans les coulisses de la fabrication de nos bruts de corindon et de spinelle Made in France<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

L\u2019oxyde de zirconium synth\u00e9tique diff\u00e8re d\u2019un produit artificiel (produit fabriqu\u00e9 par l\u2019Homme ne poss\u00e9dant aucun \u00e9quivalent naturel connu). Cette mati\u00e8re est qualifiable de synth\u00e9tique car il existe une gemme naturelle \u00e9quivalente appel\u00e9e baddeleyite. Le zirconium cubique est synth\u00e9tis\u00e9 gr\u00e2ce \u00e0 un proc\u00e9d\u00e9 unique : la synth\u00e8se par croissance en autocreuset. La croissance en autocreuset En […]<\/p>\n","protected":false},"author":2,"featured_media":11108,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","footnotes":""},"categories":[496],"tags":[],"class_list":["post-5508","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fabrication"],"acf":[],"yoast_head":"\nOxyde de Zirconium CZ - son proc\u00e9d\u00e9 de croissance<\/title>\n<meta name=\"description\" content=\"Invent\u00e9 en 1964, le CZ est un oxyde de zirconium synth\u00e9tique, utilis\u00e9 d\u00e8s 1973 comme imitation du diamant et des pierres de couleur.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Oxyde de Zirconium CZ - son proc\u00e9d\u00e9 de croissance\" \/>\n<meta property=\"og:description\" content=\"Invent\u00e9 en 1964, le CZ est un oxyde de zirconium synth\u00e9tique, utilis\u00e9 d\u00e8s 1973 comme imitation du diamant et des pierres de couleur.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\" \/>\n<meta property=\"og:site_name\" content=\"Dalloz stones & rough\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/dalloz1917\/\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-19T15:44:15+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-25T09:32:09+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/dalloz-stones.com\/app\/uploads\/2022\/12\/CZ-2.png\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Laurence Canard\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Laurence Canard\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\"},\"author\":{\"name\":\"Laurence Canard\",\"@id\":\"https:\/\/dalloz-stones.com\/fr\/#\/schema\/person\/fa8f8e910ce20c982f8b8baebdc2858c\"},\"headline\":\"L\u2019oxyde de zirconium (CZ) et son proc\u00e9d\u00e9 de synth\u00e8se par croissance en autocreuset\",\"datePublished\":\"2022-12-19T15:44:15+00:00\",\"dateModified\":\"2025-07-25T09:32:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\"},\"wordCount\":476,\"publisher\":{\"@id\":\"https:\/\/dalloz-stones.com\/fr\/#organization\"},\"image\":{\"@id\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/dalloz-stones.com\/app\/uploads\/2022\/12\/CZ-2.png\",\"articleSection\":[\"Fabrication des pierres\"],\"inLanguage\":\"fr-FR\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\",\"url\":\"https:\/\/dalloz-stones.com\/fr\/oxyde-de-zirconium-cz-et-son-procede-de-synthese-par-croissance-en-autocreuset\/\",\"name\":\"Oxyde de Zirconium CZ - 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