Fused Silica/Investment Casting & Refractory Grade

Qmin-SIL Series Fused Silica is made of high purity Chinese crystal Silica by electrically fusing (fusing temperature 1800-2000º C) to amorphous Silicon dioxide, then specially engineered ingots, granular and flour form designed for investment casting and high grade refractory application. This product has a very low thermal conductivity and excellent thermal shock resistance.

Special Features:
Very low coefficient of thermal expansion & Low thermal conductivity
Superior Heat Resistance & Chemical Resistance
Pure(high SiO2 content, low Iron, Potassium & Sodium Oxide)
Consistent Chemistry
Statistically controlled particle size distribution

Main Applications:
Investment Casting, shell mould product
High Grade Refractory Materials
Others

Chemical Composition:
AB grade C grade
SiO2: 99.8%Min 99.5%Min
Al2O3: 0.02%Max. 0.08%Max.
Fe2O3: 0.01%Max. 0.06%Max.
Na2O: 0.005%Max. 0.02Max
TiO2: 0.002%Max. 0.02%Max.
K2O: 0.002%Max 0.02%Max.
0.003%Max(For Powder)
CaO: 0.002%Max. 0.06%Max.
MGO 0.002%Max 0.02%Max.
0.003%Max(For Powder)
Crystallinity
(Quartz+Tridymite+Cristoblite) 0.1% Max. 0.1% Max.

Physical Properties:
Appearance: Transparent Granules or White Powder
Specific Gravity: 2.21
Moisture: 0.05%Max.
Magnetic: 0.01 Max.

Size Available: (Ingot, Granules and powder)
(1) 8-5mm, 5-3mm, 3-1mm, 1-0mm, 1-0.5mm, 1-0.2mm
0-0.5mm, 0.5-0.2mm, 0.5-0.1mm, 0.2-0.1mm, -0.1mm
(2) 4+10mesh, -10+20mesh, -20+50mesh, -30+50mesh, -30+60mesh,
-50+100mesh, -60-120mesh, -100mesh,
120F, 200F, 325F, 400F, 600F, 800F, 1250F
(3) C grade is only granules aviable.
Remark: The particle size can also be produced as customer's special requirement

We can offer further product information and our technical experience if you need, and are in position to supply specially designed product as customer requirement.

 AB grade  C grade
 SiO2  99.8%Min  99.5%Min
 Al2O3  0.02%Max  0.08%Max
 Fe2O3  0.01%Max  0.06%Max