ceramic ball ZrO2 ceramic possesses high strength, high hardness, high rigidity, high toughness, high wear resistance, self-lub ceramic ballZrO2 ceramic possesses high strength, high hardness ... . At the same time, it is used as valve ball in petro-chemical, metallurgy, papermaking, electro-planting and other ... Industry Branch of Machinery Industry Professional Skill Appraisal Center ZrO2 ceramic ball