Graphite Crucible, Graphite Block, Graphite Mold manufacturer / supplier in China, offering Good Thermal Stability Zirconia/Zirconium Oxide /Zro Ceramic Foam Filter for Steel Casting, High Quality Acid and Alkali Corrosion Resistance Zirconia Ceramic Foam Filter, Density 0.9-1.5g/Cm³ Zirconia Ceramic Foam Filter for Reducing Gas From Liquid Metal and so on.