Black corundum, nke a makwaara dị ka obere alumina corundum, dị na ọkụ ọkụ arc, na-agbaze bauxite ma mee ụdị α-Al2O3 na ígwè spinel dị ka isi ihe ịnweta nke kristal ojii ojii, bụ nke e ji mara ọdịnaya Al2O3 dị ala, na ụfọdụ ego nke Fe2O3 (10% ma ọ bụ karịa), ya mere, ọ nwere agafeghị oke ike ike, elu siri ike, elu okpomọkụ iguzogide, ọkụ ala arụmọrụ okpomọkụ àgwà.A na-ejikarị eme ihe maka egweri n'efu, dị ka egweri siri ike tupu ngwaahịa electroplating, nke a na-ejikarị maka igwe anaghị agba nchara, ngwaahịa ọla, iko anya, achara na ngwaahịa osisi polishing na sandblasting, bụkwa mmepụta nke resin egweri wheel, ịcha iberibe, emery ákwà ọhụrụ abrasive. .
Oge nzipu: Eprel 11-2023