{"id":4600,"date":"2020-09-09T05:58:31","date_gmt":"2020-09-09T05:58:31","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4600"},"modified":"2020-09-09T05:58:31","modified_gmt":"2020-09-09T05:58:31","slug":"zirconium-oxide-ceramic","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/zirconium-oxide-ceramic\/","title":{"rendered":"C\u00e9ramique \u00e0 base d'oxyde de zirconium"},"content":{"rendered":"<p>La c\u00e9ramique \u00e0 base d'oxyde de zirconium, \u00e9galement appel\u00e9e c\u00e9ramique de zircone. La c\u00e9ramique de zircone pr\u00e9sente des points de fusion et d'\u00e9bullition \u00e9lev\u00e9s, une grande duret\u00e9, des propri\u00e9t\u00e9s isolantes \u00e0 temp\u00e9rature ambiante et une conductivit\u00e9 \u00e9lectrique \u00e0 haute temp\u00e9rature. La c\u00e9ramique \u00e0 base d'oxyde de zirconium est un nouveau type de c\u00e9ramique dot\u00e9 de propri\u00e9t\u00e9s physiques et chimiques exceptionnelles. \u00c0 l'heure actuelle, parmi les diff\u00e9rentes c\u00e9ramiques \u00e0 base d'oxydes m\u00e9talliques, les propri\u00e9t\u00e9s de la c\u00e9ramique \u00e0 base de zircone ne sont que l\u00e9g\u00e8rement inf\u00e9rieures \u00e0 celles de l'alumine. Dans le domaine des c\u00e9ramiques structurelles, la c\u00e9ramique \u00e0 base d'oxyde de zirconium est largement utilis\u00e9e en raison de sa grande t\u00e9nacit\u00e9, de sa r\u00e9sistance \u00e9lev\u00e9e \u00e0 la flexion et \u00e0 l'usure, de ses excellentes propri\u00e9t\u00e9s d'isolation thermique et de son coefficient de dilatation thermique proche de celui de l'acier.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-pzr\/\">Filtre en mousse c\u00e9ramique \u00e0 base de zircone<\/a> Il pr\u00e9sente une structure poreuse tridimensionnelle, une r\u00e9sistance aux hautes temp\u00e9ratures (jusqu'\u00e0 1 700 \u00b0C) et une grande r\u00e9sistance m\u00e9canique. Il permet de filtrer les scories de quelques microns pr\u00e9sentes dans l'acier en fusion \u00e0 haute temp\u00e9rature, de rendre la surface des pi\u00e8ces moul\u00e9es en acier plus lisse, de r\u00e9duire les pertes li\u00e9es \u00e0 l'usinage et de diminuer les co\u00fbts de production, tout en am\u00e9liorant la productivit\u00e9 du travail. Il permet \u00e9galement de ralentir et d\u2019uniformiser le d\u00e9bit du m\u00e9tal en fusion, de sorte que l\u2019acier en fusion puisse remplir efficacement et enti\u00e8rement le moule, ce qui rend la structure interne de la pi\u00e8ce moul\u00e9e en acier plus homog\u00e8ne, am\u00e9liore consid\u00e9rablement ses propri\u00e9t\u00e9s m\u00e9caniques globales et renforce la qualit\u00e9 de la pi\u00e8ce moul\u00e9e.<\/p>\n<p>Dans la production d\u2019alliages d\u2019aluminium, en raison des limites du proc\u00e9d\u00e9, les petites impuret\u00e9s non m\u00e9talliques en suspension dans la masse fondue ne peuvent pas \u00eatre enti\u00e8rement \u00e9limin\u00e9es, ce qui entra\u00eene un taux excessivement \u00e9lev\u00e9 de rebuts de coul\u00e9e. C'est pourquoi le proc\u00e9d\u00e9 de filtration et de purification a \u00e9t\u00e9 mis au point afin de filtrer efficacement les impuret\u00e9s non m\u00e9talliques pr\u00e9sentes dans le m\u00e9tal en fusion. Le filtre en mousse c\u00e9ramique pr\u00e9sente une structure squelettique unique, constitu\u00e9e d'un r\u00e9seau tridimensionnel de pores courbes interconnect\u00e9s. Ses principales caract\u00e9ristiques sont une porosit\u00e9 ouverte \u00e9lev\u00e9e, des canaux sinueux et une grande surface sp\u00e9cifique. Cette structure permet un contact total avec le m\u00e9tal en fusion, les gros d\u00e9bris et la plupart des impuret\u00e9s sup\u00e9rieures \u00e0 10 \u00b5m. Ces am\u00e9liorations ont permis d'augmenter l'efficacit\u00e9 de filtration, qui est pass\u00e9e de 50%-60% \u00e0 72%-97%.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4601\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/09\/Zirconium-Oxide-Ceramic-1.jpg\" alt=\"C\u00e9ramique \u00e0 base d&#039;oxyde de zirconium\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Zirconium-Oxide-Ceramic-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Zirconium-Oxide-Ceramic-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Fonctionnement du filtre en mousse c\u00e9ramique \u00e0 base de zircone<\/strong><\/p>\n<p>\u00c9limination des impuret\u00e9s et des scories : purifier le m\u00e9tal en fusion tout en le d\u00e9gazant.<\/p>\n<p>Apr\u00e8s correction de l'\u00e9coulement turbulent et filtrage, la viscosit\u00e9 du m\u00e9tal en fusion est r\u00e9duite et la fluidit\u00e9 de l'alliage d'aluminium 5% est am\u00e9lior\u00e9e.<\/p>\n<p>Am\u00e9liorer la capacit\u00e9 de remplissage du m\u00e9tal en fusion.<\/p>\n<p>Avant la filtration, l'\u00e9coulement du m\u00e9tal en fusion est turbulent ; apr\u00e8s la filtration, il devient laminaire (le canal d'\u00e9coulement du filtre en c\u00e9ramique alv\u00e9olaire pr\u00e9sente des courbes et des virages), ce qui r\u00e9duit l'entra\u00eenement de particules et la formation de scories secondaires.<\/p>\n<p>Au fur et \u00e0 mesure que la filtration progresse, le m\u00e9canisme de filtration passe du tamisage et de la formation d'un g\u00e2teau de filtration \u00e0 une filtration en lit profond, et la puret\u00e9 du m\u00e9tal fondu filtr\u00e9 ne cesse d'augmenter.<\/p>","protected":false},"excerpt":{"rendered":"<p>Zirconium Oxide Ceramic also called zirconia ceramics. Zirconia Ceramic has high melting and boiling points, high hardness, insulators at room temperature, and electrical conductivity at&hellip;<\/p>","protected":false},"author":1,"featured_media":4602,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4666,752,4665],"class_list":["post-4600","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-zirconia-ceramic","tag-zirconia-ceramic-foam-filter","tag-zirconium-oxide-ceramic"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Zirconium Oxide Ceramic Foam Filter for Molten Metal<\/title>\n<meta name=\"description\" content=\"Zirconium Oxide Ceramic foam filter has a three-dimensional porous structure, high temperature resistance, can filter a few microns of slag.\" \/>\n<meta name=\"robots\" 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