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Fused Silica PowderFused Silica Lump Fused Silica Fused Silica Powder is a high-quality quartz via high temperature smelting process through a unique form processing,Its crystal structure orderly transition from disorder to order.Fused Silica is of high purity, high white color, with a very low thermal expansion coefficient and good electromagnetic radiation,Reasonable controllable particle size distribution and excellent chemical and optical characteristics. 1. Fused Silica(Quartz) Grains ,Fused Micro Silica(Quartz) Powder Grade A :SiO2: 99.9%min Grade B :SiO2: 99.8%min Particle size: A : 5-50mm, 0-0.5mm , 0.5-0.2mm , 0.2-0.1mm , 0.5-1mm B:-4+10mesh ,-10+20mesh , -20+50mesh , -30+50mesh , -50+100mesh ,-120F ,-200F , -325F, -400F,-600F or in accordance with customer's request . 2. Crystalline Silica(Quartz) Sands , Crystalline Micro Silica(Quartz) Powder High Whitness & Purity Grade : SiO2 : 99.5% min-99.98%min Refined Grade : SiO2 : 99.5% min-99.9%min Particle size: 2-4mesh , 4-10mesh , 10-20mesh , 20-40mesh , 40-80mesh , 80-200mesh , -100mesh , -200mesh , -325mesh , -400mesh , -600mesh or in accordance with customer's request .Fused Silica Powder mainly used for large-scale integrated circuits and semiconductor components of the package,High-grade electrical insulation,ceramics, anti -heatmaterials,silicone rubber industries. We have Advanced Quality Control /Assurance Equipment for Testing & Analyzing (MALVERN Mastersizer 2000 Analysizer): Sieve analysis , PH , Magnetics , Surface Area , Laser PSD Sizer , Full set of Chemicals Analysis . If you are interested in Silica , please let us know . For more details , please contact us . Best regards. Mr. Richard. Lee