{"id":6630,"date":"2021-04-04T12:44:35","date_gmt":"2021-04-04T12:44:35","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6630"},"modified":"2021-04-12T06:48:34","modified_gmt":"2021-04-12T06:48:34","slug":"linfluence-dune-trop-grande-quantite-doxyde-de-sodium-dans-la-poudre-dalumine-sur-les-ceramiques","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/fr\/linfluence-dune-trop-grande-quantite-doxyde-de-sodium-dans-la-poudre-dalumine-sur-les-ceramiques\/","title":{"rendered":"Influence de l'exc\u00e8s d'oxyde de sodium dans la poudre d'alumine sur les c\u00e9ramiques"},"content":{"rendered":"

Haute temp\u00e9rature poudre d'alumine<\/a> est compos\u00e9 d'hydroxyde d'aluminium industriel et de bauxite, de tamis mol\u00e9culaire et d'acide sulfurique. boules de broyage<\/a> comme mati\u00e8res premi\u00e8res. Il est calcin\u00e9 dans un four tunnel pendant une longue p\u00e9riode \u00e0 haute temp\u00e9rature. Il a un point de fusion \u00e9lev\u00e9, une excellente r\u00e9sistance m\u00e9canique, une duret\u00e9, une r\u00e9sistivit\u00e9 \u00e9lev\u00e9e et une conductivit\u00e9 thermique. Il peut \u00eatre largement utilis\u00e9 dans des industries telles que les \u00e9quipements \u00e9lectroniques, les c\u00e9ramiques structurelles, les mat\u00e9riaux r\u00e9fractaires, les mat\u00e9riaux r\u00e9sistants \u00e0 l'usure et les mat\u00e9riaux de polissage. Quels sont donc les effets d'une teneur excessive en oxyde de sodium dans la poudre d'alumine haute temp\u00e9rature sur les c\u00e9ramiques ?<\/p>\n

L'effet le plus intuitif d'une teneur trop \u00e9lev\u00e9e en oxyde de sodium dans la poudre d'alumine est la densit\u00e9 de la c\u00e9ramique, alors comment cela affecte-t-il sa densit\u00e9 ?<\/p>\n

Na2O est l'un des indicateurs les plus importants de l'exposition \u00e0 des temp\u00e9ratures \u00e9lev\u00e9es. micropoudre d'alumine<\/a>Le Na2O et l'Al2O3 se combinent \u00e0 haute temp\u00e9rature pour former un compos\u00e9 stable de peraluminate de sodium Na2O-1 I Al2O3, commun\u00e9ment appel\u00e9 phase \u03b2. \u00c0 haute temp\u00e9rature, Na2O et Al2O3 se combinent pour former un compos\u00e9 stable de peraluminate de sodium Na2O-1 I Al2O3, commun\u00e9ment appel\u00e9 alumine en phase \u03b2. Sa structure est une structure en couches l\u00e2ches. Dans ces conditions, la capacit\u00e9 \u00e0 combiner AI2O3 est tr\u00e8s forte, le rapport de masse entre Na2O et A12O3 est de 1:18,096, m\u00eame si une petite quantit\u00e9 de Na2O existe, une grande quantit\u00e9 de A12O3 en phase \u03b2 sera form\u00e9e, affectant ainsi la densit\u00e9 des c\u00e9ramiques. En outre, ce compos\u00e9 a une conductivit\u00e9 \u00e9lev\u00e9e, atteignant 10 ~ S-cnl ~ \u00e0 300\u00b0C, ce qui affecte les propri\u00e9t\u00e9s \u00e9lectriques du substrat c\u00e9ramique. Par cons\u00e9quent, la poudre d'alumine \u00e0 haute temp\u00e9rature utilis\u00e9e dans la production de substrats c\u00e9ramiques doit \u00eatre constitu\u00e9e de produits d'alumine \u00e0 faible teneur en sodium, c'est-\u00e0-dire une poudre d'alumine \u00e0 haute temp\u00e9rature dont la teneur en Na2O est inf\u00e9rieure \u00e0 0,1%.<\/p>","protected":false},"excerpt":{"rendered":"

High temperature alumina powder is made of industrial aluminum hydroxide and bauxite, molecular sieve and grinding balls as raw materials. It is calcined in a tunnel kiln for a long time at high temperature. It has a high melting point, excellent mechanical strength, hardness, high resistivity and Thermal conductivity. It can be widely used in […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","site-sidebar-layout":"default","site-content-layout":"default","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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