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Silica Sand 0.2-0.1mm Fused Quartz for Refractory Materials. High Purity SiO2: SiO2 content exceeds 99.95% with minimal impurities like Al2O3 and Fe2O3. Near Zero Thermal Expansion: Features extremely low thermal conductivity and excellent thermal stability. Uniform Particle Shape: Special mechanical processing ensures circular particles and stable distribution. OEM/ODM Support: Manufacturer offers both OEM and ODM services for customized needs. ISO Certified: Product meets ISO certification standards for quality assurance. Versatile Applications: Suitable for ceramic, casting, and fine casting industries. Fast Lead Time: Average lead time within 15 workdays for both peak and off-season.