Black corundum, wanda kuma aka sani da low alumina corundum, yana cikin tanderun baka, da bauxite smelting da kuma sanya daga wani nau'i na α-Al2O3 da baƙin ƙarfe spinel a matsayin babban ma'adinai lokaci na launin toka crystal, wanda aka halin low Al2O3 abun ciki, da kuma wani adadin Fe2O3 (10% ko haka), don haka yana da matsakaici zafi yanayin, high zafin jiki aiki. Yafi amfani da free nika, kamar m nika kafin electroplating kayayyakin, yafi amfani ga 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