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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 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 PropertyReference Value
Density2.2g/cm3
Compressive Strength1100Mpa
Bending Strength67Mpa
Tensile Strength48Mpa
Poisson's Ratio0.14~0.17
Elastic Modulus72000Mpa
Shearing Modulus31000Mpa
Mohs Hardness5.5~6.5

 

Table 2.

Mechanical PropertyReference Value
Deformation Point1280℃
Softening Point1780℃
Annealing Point1250℃
Specific Heat(20~350℃)670J/kg.℃
Thermal Conductivity(20℃)1.4W/m.℃
Refractive Index1.4585
Coefficient of thermal expansion5.5×10-7cm/cm.℃
Hot work temperature1750~2050℃
The temperature for a short time1300℃
The temperature for a long time1100℃

 

Table 3.

Electrics PropertyReference Value
Resistivity7×107Ω.cm
Dielectric Strength250~400Kv/cm
Dielectric Constant3.7~3.9
Dielectric absorption coefficient<4×104
Dielectric loss coefficient<1×104

 

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