... ,low price 5.high hardness.wear resistance Alumina balls,nozzles,substrates have the performances of high ... grinding medium for various ceramic material, α-Al2O3 powder,flake alumina,kaolin,fusible corundum,porcelain enamel,dye, ... 99%/99.7% Al2O3 Material Parameters: ItemTest ConditionUnit&Symbol95%Alumina ceramics99%Alumina ceramics99.7%Alumina ceramicsThe main chemical ingredientAl2O3Al2O3Al2O3Bulk ...