{"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":"pengantar-bubuk-alumina","status":"publish","type":"post","link":"https:\/\/www.aluminaceramicball.com\/id\/pengantar-bubuk-alumina\/","title":{"rendered":"Pengantar kebutuhan dan pengetahuan dasar bubuk alumina"},"content":{"rendered":"<p><a href=\"\/id\/produk\/bubuk-keramik-alumina\/\" target=\"_blank\" rel=\"noopener\">Bubuk alumina<\/a> (Al2O3) adalah bubuk amorf putih, milik oksida anorganik, tidak larut dalam air, larut dalam alkali kuat dan asam kuat, titik leleh 2054 \u00b0 C, titik didih 2980 \u00b0 C, dengan kemurnian tinggi dan keputihan Tinggi, spesifisitas tinggi, stabilitas termal yang baik, distribusi ukuran partikel yang seragam, dan fluiditas yang baik; alumina memiliki banyak isomer, dan <a href=\"https:\/\/www.aluminaceramicball.com\/id\/mengontrol-kualitas-dan-efek-bubuk-alumina\/\">bubuk alumina<\/a> yang disiapkan dengan metode persiapan yang berbeda sangat berbeda. Tiga bentuk kristal alumina yang paling umum adalah: \u03b1-Al2O3, \u03b2-Al2O3, dan \u03b3-Al2O3.<\/p>\n<p>(A) \u03b1-Al2O3, sistem kristal trigonal, ada dalam bentuk korundum di alam, dengan struktur kompak, konduktivitas termal yang baik, merupakan jenis kristal yang paling stabil, dan kekerasannya nomor dua setelah berlian dan silikon karbida;<\/p>\n<p>(B) \u03b2-Al2O3, struktur spinel kubik, ion oksigen tersusun dalam kubik yang berpusat pada muka, dan ion aluminium mengisi celah. \u03b2-Al2O3 bukanlah substansi terpisah dari Al2O3, tetapi merupakan mineral polialuminat dengan kandungan alumina yang tinggi;<\/p>\n<p>(C) \u03b3-Al2O3 adalah perantara dari transformasi dari Al2O3 amorf menjadi \u03b1-Al2O3, dan merupakan bentuk suhu rendah dari Al2O3. Strukturnya longgar, kepadatannya kecil, aktivitasnya besar, dan mudah menyerap air. Itu tidak dapat hidup secara stabil di bawah suhu tinggi, dan tidak ada di alam.<\/p>\n<p>Output bubuk alumina menempati sebagian besar dari total output bubuk keramik buatan di dunia. Dari total permintaan bubuk alumina, lebih dari 80% digunakan untuk peleburan aluminium, dan sisanya dapat langsung digunakan dalam bentuk bubuk alumina sebagai bahan baku untuk produksi produk lain. Bubuk alumina yang diaplikasikan langsung terutama digunakan pada bahan tahan api, keramik halus, abrasif, dll. Bubuk alumina dengan kemurnian tinggi dengan kemurnian tinggi umumnya digunakan untuk membuat kristal buatan, alumina transparan, komponen elektronik presisi, dll. Selain itu, kristal buatan memiliki persyaratan kualitas yang sangat tinggi untuk alumina dengan kemurnian tinggi, dan sebagian besar kemurniannya harus mencapai 5N. China tertinggal jauh di belakang negara-negara asing dalam persiapan alumina dengan kemurnian tinggi, dan bubuk dengan kualitas yang sangat baik masih mengandalkan impor.<\/p>","protected":false},"excerpt":{"rendered":"<p>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 [&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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