325M Zircon Powder for Ceramic 1. Best Quality at Competitive Price 2.SGS Certificaton 3. Free Sample 325M Zircon Powder for Ceramic 1. Introduction &Application Zircon powder is ZrSiO4 (for) zirconium silicate minerals, composed of main components of castings have strong ability of quench resistance, good adhering sand.To prevent defects casting surface effect. Casting surface is smooth, easy ...