It's made from natural quartz after the process of melting and fine grinding. It has high purity,
heat resistance and corrosion resistance, also be low coefficient of thermal expansion.
It contains no air bubble and controlled to the grade of PPM, has the great performance
such as high temperature proof, chemical stability, perfect insulation and transmittance, etc.
Material properties
Quartz glass has unique and outstanding performance
High Durability
High Corrosion Resistance
Transmission of visible light>90%
Working temperature: 1100°C
OH content less than 20ppm, 15ppm,10ppm,5ppm and 2ppm.
Physical properity:
| SiO2 | 99.997% |
| Density :(g/cm3) | 2.2 |
| Degree of hardness moh' scale (Pa) | 6.6 |
| Melting point: | 1732°C |
| Working temperature : | 1100°C |
| Max temperature can reach in a short time : | 1450°C |
| Acid tolerance: | 30 times than Ceramics,150 times than stainless steel |
| Visible light transmittance: | above 93% |
| UV spectral region transmittance: | 80% |
| Resistance value: | 10000 times than ordinary glass |
| Annealing point: | 1180°C |
| Softening point: | 1630°C |
| Strain point: | 1100°C |
Chemical Composition(ug/g)
| Cr | Ge | Fe | Mg | Ti | Ga | Al | Na | Li | K |
| 0.1 | 0.4 | 1.5 | 0.4 | 0.1 | 0.8 | 16 | 2.3 | 0.5 | 2 |
