Fused silica is produced by melting high purity silica sand at extremely high temperature in an electric furnace. Featured by its high content of SiO2, it has the characters of lowest thermal conductivity, excellent electrical insulation and the stable chemical property.
Specific gravity: 2.2g/m3
Hardness: 7mohs
PH: 5.8-6.3
Applications: Refractory, Investment casting, Filler in EMC, Specialty coating, Ceramics, Shell mould ,etc.
|
Item size
|
Size
|
Standard %
|
SiO2 %
|
Fe2O3
ppm
|
Al2O3
ppm
|
K2O
ppm
|
Na2O
ppm
|
|
3--1mm
|
+3.0mm
|
0
|
99.95
|
30
|
150
|
20
|
20
|
|
-1.0mm
|
5≥
|
|
1--0.5mm
|
+1.0mm
|
2≥
|
99.95
|
30
|
150
|
20
|
20
|
|
-5.0mm
|
5≥
|
|
0.5—0.212mm
|
+5.0mm
|
2≥
|
99.93
|
30
|
150
|
20
|
20
|
|
0.212mm
|
5≥
|
|
0.5—0.1mm
|
0.5mm
|
2≥
|
99.93
|
30
|
150
|
20
|
20
|
|
-0.10mm
|
5≥
|
|
0.4-0.212mm
|
0.40mm
|
2≥
|
99.9
|
30
|
150
|
20
|
20
|
|
-0.212mm
|
5≥
|
99.9
|
|
0.3—0.15mm
|
+0.30mm
|
1≥
|
99.9
|
30
|
150
|
20
|
20
|
|
-0.15mm
|
10≥
|
|
|
0.15—0.075mm
|
0.15mm
|
2≥
|
99.9
|
30
|
150
|
20
|
20
|
|
0.075mm
|
20≥
|
|
|
-0.075mm
|
0.075mm
|
8≥
|
99.9
|
30
|
500
|
20
|
20
|
|
-0.045mm
|
0.045mm
|
10≥
|
99.85
|
30
|
800
|
20
|
20
|
