这只是三氧化二铝的阳光是从。
Ceramic: aluminium oxide, ceramic tile material, magnesium oxide, talcum and so on.陶瓷:氧化铝、瓷砖材料、氧化镁、滑石等。
A basic variety of aluminium oxide, white colour its hardness is higher and toughness slightly lower than that of a.刚玉的基本品种,白色,与棕刚玉相比,硬度高、性稍低。