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Products>Other
types of glass>Quartz
glass |
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| Quartz
glass |
Our
quartz glass optical windows are resistant against high temperature
and pressure and can be applied mainly in such fields as special
light sources, optical instrument, optical electronics, military
equipment, metallurgy, semi-conductor, and optical communications.
Their experimental temperature is 1200 degrees and softening
temperature 1730 degrees. Detailed parameters are given as follows:
1. JGS1( Extreme UV optical quartz glass)
It is a high-purity optical quartz glass made by
oxyhydrogen flame melting. Its satisfactory UV light transmission
performance surpass all the other glass types in particular
in the shortwave UV zone and can achieve a 90% transmission
rate at the wavelength of 185mμ. Hence it is an ideal choice
for applications in the wavelength range of 185-2500mμ.
2. JGS2 (UV optical quartz glass)
It is an optical quartz glass made by oxyhydrogen
flame melting and is suggested for applications in the wavelength
range of 220-2500mμ
3. JGS3 (Infrared quartz glass)
It has a good performance of infrared light transmission
with a transmittance of over 85%. It is recommended for applications
in the wavelength range of 260-3500mμ. |
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| Quartz glass characteristics |
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Table 1. |
| Mechanical
Property
|
Reference
Value
|
| Density |
2.2g/cm3 |
| Compressive Strength |
1100Mpa |
| Bending Strength |
67Mpa |
| Tensile Strength |
48Mpa |
| Poisson's Ratio |
0.14~0.17 |
| Elastic Modulus |
72000Mpa |
| Shearing Modulus |
31000Mpa |
| Mohs Hardness |
5.5~6.5 |
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| Table 2. |
| Mechanical
Property
|
Reference
Value
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| Deformation Point |
1280°C |
| Softening Point |
1780°C |
| Annealing Point |
1250°C |
| Specific Heat(20~350°C) |
670J/kg.°C |
| Thermal Conductivity(20°C) |
1.4W/m.°C |
| Refractive
Index |
1.4585 |
| Coefficient of
thermal expansion |
5.5*10-7cm/cm.°C |
| Hot work temperature |
1750~2050°C |
| The temperature
for a short time |
1300°C |
| The temperature
for a long time |
1100°C |
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| Table 3. |
| Electrics
Property
|
Reference
Value
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| Resistivity |
7*107Ω.cm |
| Dielectric Strength |
250~400Kv/cm |
| Dielectric Constant |
3.7~3.9 |
| Dielectric absorption
coefficient |
<4*104 |
| Dielectric loss
coefficient |
<1*104 |
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