Characteristic
Excellent arc resistance; Low coefficient of thermal expansion; Good electrical insulation; Great antioxidation and mechanical property ability
Application
Filler of quartz crucible;
Filler of FBT and EMC;
Raw materials of cosmetics
Nano spherical fused silica used in quartz crucible
Spherical fused silica powder used in quartz ceramics. It owns excellent arc resistance; low coefficient of thermal expansion and good electrical and so on characteristics. These characteristics are good for solving the quartz ceramics’ brittleness problem. After adding spherical silica powder into quartz ceramics, it would make quartz crucible to be denser. Meanwhile, it greatly increased strength of crucible.Nano spherical fused silica own good physical properties, excellent chemical stability and unique optical properties which made it to be the most important materials for the quartz ceramics crucibles.
l Technique Data
|
Amorphous Silica Powder
|
|
|
Appearance
|
Fine white powder
|
|
X-ray
|
Amorphous
|
|
BET surface area
|
20m2/g
|
|
Particle shape
|
Spherical
|
|
Particle size
|
0.02 – 0.55 microns
|
|
Bulk density:
|
34.1 kg/cu kg
|
|
Refractive index
|
1.46
|
|
Behavior in water
|
Hydrophilic
|
|
Specific gravity:
|
2.1
|
|
CHEMISTRY
|
|
|
SiO2
|
99.9 %
|
|
Na
|
100 – 300 ppm
|
|
Al
|
10 – 30 ppm
|
|
Fe
|
<10 ppm
|
|
Mg
|
<10 ppm
|

