{"id":6646,"date":"2021-04-04T13:05:18","date_gmt":"2021-04-04T13:05:18","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6646"},"modified":"2021-04-12T06:47:20","modified_gmt":"2021-04-12T06:47:20","slug":"wat-zijn-de-kristalvormen-van-aluminiumoxidepoeder","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/nl\/wat-zijn-de-kristalvormen-van-aluminiumoxidepoeder\/","title":{"rendered":"Wat zijn de kristalvormen van aluminiumoxidepoeder"},"content":{"rendered":"<p>De kristalvormen van <a href=\"\/nl\/product\/aluminiumoxide-keramisch-poeder\/\" target=\"_blank\" rel=\"noopener\">Al2O3<\/a> zijn: \u03b1, \u03b3, \u03b7, \u03b4, \u03b8, \u03ba, \u03c7 enzovoort. Als de externe omstandigheden veranderen, verandert de kristalvorm. In de Al2O3 variant, aangezien de zuurstof in \u03b1-Al2O3 (dichtheid 3,99g\/cm3) het meest compact verpakt is, is alleen \u03b1-Al2O3 (korund) stabiel en zijn andere kristalvormen onstabiel. Omgevormd tot \u03b1-Al2O3. Naast korund is \u03b3-Al2O3 de meest voorkomende kristalsoort van Al2O3. \u03b3-Al2O3 heeft een spinelstructuur, maar in de structuur zijn sommige tetrahedral voids niet gevuld, waardoor de dichtheid van \u03b3-Al2O3 (3,65g\/cm3) kleiner is dan die van korund. Wanneer Al(OH)3 wordt verhit voor dehydratie, wordt \u03b3-Al2O3 gevormd bij ongeveer 450 \u00b0C, en \u03b3-Al2O3 wordt verhit tot een hogere temperatuur om te veranderen in korund. De omzettingssnelheid is echter hoger bij een verandering van meer dan 1000?<\/p>\n<p>Sommige andere onstabiele kristalvormen van aluminiumoxide worden ook gevormd onder verschillende omstandigheden wanneer Al(OH)3 wordt verwarmd en gedehydrateerd. \u03c1-Al2O3 is amorf, maar sommige mensen denken dat het een overgangstoestand is tussen amorf en kristallijn. Omdat \u03c1-Al2O3 de enige vorm van Al2O3 is die spontaan kan hydrateren bij kamertemperatuur, kan het worden gebruikt als cementeermiddel voor vuurvaste gietstukken, waardoor het de afgelopen jaren aandacht heeft gekregen.<\/p>","protected":false},"excerpt":{"rendered":"<p>The crystal forms of Al2O3 are: \u03b1, \u03b3, \u03b7, \u03b4, \u03b8, \u03ba, \u03c7 and so on. When the external conditions change, the crystal form will change. In the Al2O3 variant, since the oxygen in \u03b1-Al2O3 (density 3.99g\/cm3) is the most compactly packed, only \u03b1-Al2O3 (corundum) is stable, and other crystal forms are unstable. Transformed into [&hellip;]<\/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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