... 99.5% 2) high purity and no dust 3)favourable price and fast delivery Silica quartz1)Specifications: silica powder is a high quality ... quartz smelting process through a unique form processing,ts crystal structure orderly transition from disorder to order ,products with high ... ,sealant,adhesive,dental materials,cosmetic,high-grade electronic,high-grade ceramic,special ceramics,special ...