fused silica

Qmin-SIL Series Fused Silica is made of highest purity Chinese crystal Silica by electrically fusing (fusing temperature 1800-2000℃)to amorophos Silicon dioxide , then specially engineered ingots, granular and flour form designed for different usage. This product has a very low thermal conductivity and excellent thermal shock resistance.

　　Special Features:

Near zero thermal expansion coefficient
Excellent thermal shock resistance
Pure(high SiO2 content,low Iron, Potassium & Sodium Oxide)
Consistent Chemistry
Statistically controlled particle size distribution
　　Main Applications:

EMC (Epoxy Molding Compound)
Investment Casting ,shell mould product
Refractory & Ceramic materials
Paint
Others

　Chemical Composition:
Item Ingot & Granule Powder
SiO2 99.9% 99.8%
AL2O3 40ppm 500ppm
Fe2O3 40ppm 50ppm
Na2O 40ppm 50ppm
K2O 40ppm 50ppm

　　Physical Properties:
Appearance: Transparent Ingots, Granule or White Powder
Specific Gravity: 2.21
Hardness( Mohs): 7.0
PH: 5-7
Whiteness: 95Min.
　　Size Available: (Ingot, Granules and powder):
　　(1) 3-10mm, 10-50mm, 8-5mm, 5-3mm, 3-1mm, 1-0.5mm, 1-0.2mm,0-0.5mm, 0.5-0.2mm,
　　　　0.5-0.1mm, 0.2-0.1mm, 0.5-1mm.
　　(2) -4+10mesh, -10+20mesh, -20+50mesh, -30+50mesh,-50+100mesh, -120F,
　　　　-200F, -325F, -400F, -600F.

　　Please contact us to inquiry for more about products particles size distribution, and chemical composition.