{"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":"apa-saja-bentuk-kristal-dari-bubuk-alumina","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/id\/apa-saja-bentuk-kristal-dari-bubuk-alumina\/","title":{"rendered":"Apa saja bentuk kristal dari bubuk alumina"},"content":{"rendered":"<p>Bentuk kristal dari <a href=\"\/id\/produk\/bubuk-keramik-alumina\/\" target=\"_blank\" rel=\"noopener\">Al2O3<\/a> adalah: \u03b1, \u03b3, \u03b7, \u03b4, \u03b8, \u03ba, \u03c7, dan seterusnya. Apabila kondisi eksternal berubah, bentuk kristal akan berubah. Pada varian Al2O3, karena oksigen dalam \u03b1-Al2O3 (densitas 3,99 g\/cm3) adalah yang paling padat, hanya \u03b1-Al2O3 (korundum) yang stabil, dan bentuk kristal lainnya tidak stabil. Diubah menjadi \u03b1-Al2O3. Selain korundum, jenis kristal Al2O3 yang umum adalah \u03b3-Al2O3. \u03b3-Al2O3 memiliki struktur spinel, tetapi dalam strukturnya, beberapa rongga tetrahedral tidak terisi, sehingga massa jenis \u03b3-Al2O3 (3,65 g \/ cm3) lebih kecil dari pada korundum. Ketika Al(OH)3 dipanaskan untuk dehidrasi, \u03b3-Al2O3 terbentuk pada suhu sekitar 450 \u00b0 C, dan \u03b3-Al2O3 dipanaskan hingga suhu yang lebih tinggi untuk berubah menjadi korundum. Namun, kecepatan konversi akan lebih cepat ketika perubahannya lebih dari 1000?.<\/p>\n<p>Beberapa bentuk kristal alumina yang tidak stabil lainnya juga terbentuk pada kondisi yang berbeda ketika Al(OH)3 dipanaskan dan didehidrasi. \u03c1-Al2O3 berbentuk amorf, tetapi beberapa orang menganggapnya sebagai kondisi transisi antara amorf dan kristal. Karena \u03c1-Al2O3 adalah satu-satunya bentuk Al2O3 yang dapat terhidrasi secara spontan pada suhu kamar, maka dapat digunakan sebagai agen penyemen untuk castable tahan api, sehingga mendapat perhatian dalam beberapa tahun terakhir.<\/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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