.jpg)
Topics Covered
DescriptionApplications of Fused SilicaTypical Chemical Analysis of Fused Silica Typical Physical Properties of Fused SilicaStandard Sizes
Description
Fused silica is made from high purity silica, using unique fusion technology, to ensure the highest quality. Our fused silica is over 99% amorphous and has an extremely low coefficient of thermal expansion and high resistance to thermal shock. Fused silica is inert, has excellent chemical stability, and has extremely low electrical conductivity.
Applications of Fused Silica
Fused silica is an excellent raw material for use in investment casting, refractories, foundries, technical ceramics, and other applications that require a consistent, high purity product with very low thermal expansion.
Typical Chemical Analysis of Fused Silica
Typical chemical analysis of fused silica is given in the following table.
| TYPICAL CHEMICAL ANALYSIS |
| Chemical |
Composition |
| SiO2 |
99.80% |
| Al2O3 |
0.05% |
| Fe2O3 |
0.015% |
| Na2O |
0.007% |
| K2O |
0.003% |
| TiO2 |
0.01% |
| CaO |
0.01% |
| MgO |
0.003% |
Typical Physical Properties of Fused Silica
Typical physical properties of fused silica are described in the following table.
| TYPICAL PHYSICAL PROPERTIES |
| Physical Property |
Specification |
| Magnetics |
0.004% |
| Specific Gravity |
2.21% |
| pH |
7.0 max. |
| Coefficient Thermal Expansion |
0.5 x 10-6 / ºC |
| Bulk Density |
65 - 75 lb. / ft3 |
Standard Sizes
Fused silica is available in the following sizings:
4 / 10, 6 / 50, 10 / 20, 20 / 50, 30 / 50, 50 / 100, 100 / 200, 120/F, 200/F, 325/F
Custom sizing and blending is also available.
Source: Washington Mills
For more information on this source, please visit Washington Mills.