{"id":6604,"date":"2021-04-04T12:03:07","date_gmt":"2021-04-04T12:03:07","guid":{"rendered":"https:\/\/www.aluminaceramicball.com\/?p=6604"},"modified":"2023-05-13T14:53:37","modified_gmt":"2023-05-13T14:53:37","slug":"penggunaan-bubuk-alumina-dalam-industri","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/id\/penggunaan-bubuk-alumina-dalam-industri\/","title":{"rendered":"Karakteristik dan penggunaan bubuk alumina dalam industri"},"content":{"rendered":"

Yang umum adalah \u03b1-Al2O3 dan \u03b3-Al2O3. Korundum di alam adalah \u03b1-Al2O3, kristal heksagonal yang dikemas secara rapat. \u03b1-Al2O3 memiliki titik leleh 2015 \u00b1 15 \u00b0 C, densitas 3,965 g\/cm3, dan kekerasan 8,8. Ini tidak larut dalam air, asam atau alkali. \u00ce\u00b3-Al2O3 adalah kristal padat kubik, tidak larut dalam air, tetapi larut dalam asam dan alkali, dan merupakan oksida amfoter yang khas.<\/p>\n

    \n
  1. Komponen utama ruby dan safir adalah alumina. Ini menunjukkan warna yang berbeda karena adanya pengotor lainnya. Ruby mengandung kromium oksida dan berwarna merah, sedangkan safir mengandung oksida besi dan titanium oksida dan berwarna biru.<\/li>\n
  2. Dalam komponen utama bauksit, kandungan alumina adalah yang tertinggi. Secara industri, bauksit dimurnikan menjadi alumina melalui proses Bayer, dan kemudian dikonversi menjadi logam aluminium melalui proses Hall-Heroult.<\/li>\n
  3. Alumina adalah alasan mengapa logam aluminium tidak mudah terkorosi di udara. Aluminium logam murni mudah bereaksi dengan oksigen di udara untuk membentuk lapisan aluminium oksida tipis yang menutupi permukaan aluminium yang terpapar udara. Lapisan aluminium oksida ini dapat mencegah aluminium teroksidasi lebih lanjut. Ketebalan dan sifat lapisan oksida ini dapat ditingkatkan dengan proses yang disebut anodisasi.<\/li>\n
  4. Aluminium adalah konduktor listrik dan panas yang baik. Bentuk kristal ampelas aluminium cocok untuk bahan abrasif dan alat pemotong karena kekerasannya yang tinggi.<\/li>\n
  5. Bubuk alumina<\/a> sering digunakan sebagai media untuk kromatografi.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    The common ones are \u03b1-Al2O3 and \u03b3-Al2O3. Corundum in nature is \u03b1-Al2O3, hexagonal close-packed crystals. \u03b1-Al2O3 has a melting point of 2015\u00b115\u00b0C, a density of 3.965g\/cm3, and a hardness of 8.8. It is insoluble in water, acid or alkali. \u03b3-Al2O3 is a cubic close-packed crystal, insoluble in water, but soluble in acid and alkali, and […]<\/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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