... 97%Al2O3 Characteristics: wear-resisting performance is good Ceramic grinder for coffee/pepper grinderMaterial:95-97%Al2O3Characteristics:wear-resisting performance ... grinder,which has good corrosion resistance, high operating temperature, good mechanical characteristics, high wear resistance, high hardness, high thermal ... Loss AngleTanσ0.0010.0010.0005 Ceramic grinder for coffee/pepper ...