... delivery 4.competitive price and High quality Refractory Ball1.>Passed ISO9001: 2000 Certification. 2 ... costs low.Application:1, high strength, high toughness products: magnetic materials, piezoelectric ceramics, dielectric ceramics2, ... resistance, corrosion-resistant products:dope, textiles, paints, printing and dyeing4, Ceramics: Electronic ceramics, refractory ceramics, structural ...