Fused Silica Grains Flour for Ceramic Shell Primary Slurry of Investment Casting

We're fused silica sand and powder manufacturer: Best Severice and Quality!!!Fused Silica Plastic Woven Bag of 25kg Net each,Then on Pallet:Product DescriptionFused Silica sand&powder Specifications:   1.Physical Properties1.1CompositionSiO21.2StructureAmorphous1.3ColourTransparent or white1.4Melting Temperatureapprox.1750ºC1.5Specific Gravity2.21g/cm31.6Hardness7 Mohs1.7Thermal Expansion0.5*10-62.Chemical Properties   2.1SiO2>99.9%2.2Al2O399.9%2.2Al2O3