... covers3, Seals,bearings4, Ball valve parts5, Hot gas flow liners6, Heat exchangers7, Semiconductor process equipmentZirconium Oxide(ZrO2)Key ... High fracture toughness9, High hardnessTypical Uses1, Precision ball valve balls and seats2, High density ball and pebble ... box covers3, Seals,bearings4, Ball valve parts5, Hot gas flow liners6, Heat exchangers7, Semiconductor process equipment ceramic ball ...