Black corundum, wanda kuma aka sani da low alumina corundum, yana cikin tanderun baka, bauxite smelting kuma an yi shi da wani nau'in α-Al2O3 da spinel baƙin ƙarfe a matsayin babban ma'adinan ma'adinai na launin toka mai launin toka, wanda ke da ƙarancin abun ciki na Al2O3, da wani adadin Fe2O3 (10% ko makamancin haka), don haka yana da matsakaicin taurin, babban ƙarfi, juriya mai zafi, yanayin yanayin yanayin zafi mai zafi.Yafi amfani da free nika, kamar m nika kafin electroplating kayayyakin, yafi amfani da bakin karfe, karfe kayayyakin, Tantancewar gilashin, bamboo da itace kayayyakin polishing da sandblasting, shi ne kuma yi na guduro nika dabaran, yankan guda, Emery zane labari abrasive. .
Lokacin aikawa: Afrilu-11-2023