| 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 185nm. Hence it is an ideal choice for applications in
the wavelength range of 185-2500nm.
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 220-2500nm.
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 260-3500nm.
| |
| Quartz
glass characteristics |
| 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 |
|
| Table 2. |
| Mechanical
Property
|
Reference
Value
|
| Deformation Point |
1280℃ |
| Softening Point |
1780℃ |
| Annealing Point |
1250℃ |
| Specific
Heat(20～350℃) |
670J/kg.℃ |
| Thermal
Conductivity(20℃) |
1.4W/m.℃ |
| Refractive
Index |
1.4585 |
| Coefficient of thermal
expansion |
5.5×10-7cm/cm.℃ |
| Hot work temperature
|
1750～2050℃ |
| The temperature for a
short time |
1300℃ |
| The temperature for a
long time |
1100℃ |
|
| Table 3. |
| Electrics
Property
|
Reference
Value
|
| 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 |
|
|
|
|
