99.5% alumina ceramic piston pump Fine ceramic piston Alumina ceramic shaft pump High purity alumina 99.5% al203 ... tube, rod, plate, disc, wafer, ring, seal, bearing, valves, pump plunger, beam, roller, shaft, screw, washer, sleeve, hunger, spacer ... wear, heat, corrosion, high electric insulation, and low thermal expansion.PropertiesUnitZirconiaAluminaContent%≥94≥95≥99.5Densityg/cm363.653.85Hardness ...