... producing advanced ceramic, such as Zirconia Ceramic, Silicon nitride Ceramic, Alumina Ceramic, etc.The quality system has passed SGS ISO9001:2008 ... , ZrO2,SiC, Si3N4 material .Specification Zirconia ceramic are applicated as shaft bearing ,plunger,sealing matetial and knife, with high density, hardess ... , we will try our best to meet you requirements. ceramic shaft