... structure ceramic includes Al2O3, ZrO2,SiC, Si3N4 material . These advanced ceramic are applicated in sealing material , mechanical system, firing equipment and refreactory ... , ZrO2,SiC, Si3N4 material .Specification Zirconia ceramic are applicated as shaft bearing ,plunger,sealing matetial and knife, with high density, hardess ,bending ...