... .the Coefficient of thermal expansion is close to steel Zirconia ceramic has high toughness,high bending strength,high abrade-resistance,the ... is close to steel,it was widely used in structure ceramic areas. Mainly products: Y-TZP grinding ball,grinding medium, ... nozzles,ball valve and seat,zirconia moulds,fan axes,drawbench mould,incision tools,wearable knives and other wearable ...