{"id":6600,"date":"2021-04-04T11:49:44","date_gmt":"2021-04-04T11:49:44","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6600"},"modified":"2021-04-12T06:49:53","modified_gmt":"2021-04-12T06:49:53","slug":"inleiding-tot-aluminiumoxidepoeder","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/nl\/inleiding-tot-aluminiumoxidepoeder\/","title":{"rendered":"Inleiding tot de behoeften en basiskennis van aluminiumoxidepoeder"},"content":{"rendered":"

Aluminiumoxide poeder<\/a> (Al2O3) is een wit amorf poeder, behorend tot anorganische oxide, onoplosbaar in water, oplosbaar in sterke basen en sterke zuren, smeltpunt 2054 \u00b0 C, kookpunt 2980 \u00b0 C, met een hoge zuiverheid en witheid Hoge, hoge specificiteit, goede thermische stabiliteit, uniforme deeltjesgrootteverdeling en goede vloeibaarheid; aluminiumoxide heeft vele isomeren, en de aluminiumoxidepoeder<\/a> bereid met verschillende bereidingsmethoden is heel verschillend. De drie meest voorkomende kristalvormen van aluminiumoxide zijn: \u03b1-Al2O3, \u03b2-Al2O3 en \u03b3-Al2O3.<\/p>\n

(A) \u03b1-Al2O3, trigonaal kristalsysteem, bestaat in de vorm van korund in de natuur, met compacte structuur, goede thermische geleidbaarheid, is het meest stabiele kristal type, en de hardheid is de tweede alleen voor diamant en siliciumcarbide;<\/p>\n

(B) \u03b2-Al2O3, kubische spinelstructuur, zuurstofionen zijn gerangschikt in face-centered cubic en aluminiumionen vullen de openingen. \u03b2-Al2O3 is geen aparte stof van Al2O3, maar een polyaluminaat mineraal met een hoog aluminiumoxide gehalte;<\/p>\n

(C) \u03b3-Al2O3 is een tussenvorm van de transformatie van amorf Al2O3 naar \u03b1-Al2O3 en is de vorm van Al2O3 bij lage temperatuur. De structuur is los, de dichtheid is klein, de activiteit is groot en het kan gemakkelijk water absorberen. Het kan niet stabiel bestaan bij hoge temperatuur en komt niet voor in de natuur.<\/p>\n

De productie van aluminiumoxidepoeder maakt een groot deel uit van de totale productie van kunstmatig keramisch poeder in de wereld. Van de totale vraag naar aluminiumoxidepoeder wordt meer dan 80% gebruikt voor het smelten van aluminium, en de rest kan direct gebruikt worden in de vorm van aluminiumoxidepoeder als grondstof voor de productie van andere producten. Het direct toegepaste aluminiumoxidepoeder wordt voornamelijk gebruikt in vuurvaste materialen, fijne keramiek, schuurmiddelen, etc. Poeder van aluminiumoxide met een hoge zuiverheidsgraad wordt over het algemeen gebruikt om kunstmatige kristallen, transparant aluminiumoxide, elektronische precisiecomponenten, etc. te maken. Bovendien hebben kunstmatige kristallen zeer hoge kwaliteitseisen voor aluminiumoxide met een hoge zuiverheid, en de meeste zuiverheden moeten 5N bereiken. China loopt ver achter op het buitenland wat betreft de bereiding van hoogzuiver aluminiumoxide, en het poeder met een bijzonder goede kwaliteit is nog steeds afhankelijk van import.<\/p>","protected":false},"excerpt":{"rendered":"

Alumina powder (Al2O3) is a white amorphous powder, belonging to inorganic oxide, insoluble in water, soluble in strong alkalis and strong acids, melting point 2054\u00b0C, boiling point 2980\u00b0C, with high purity and whiteness High, high specificity, good thermal stability, uniform particle size distribution and good fluidity; alumina has many isomers, and the alumina powder prepared […]<\/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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