• Beijing Zhong Cheng Quartz Glass Co., Ltd

    CUSTOM FABRICATION OF HIGH PRECISION GLASS PARTS

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  • Quartz Glass

    In the optical component, the domestic optical quartz glass can be mainly divided into three grades: JGS1, JGS2, and JGS3 according to the spectral application range:

    1.  JGS1 (Far Ultraviolet Optical Quartz Glass/ Synthetic Fused Silica)

    It is an optical quartz glass melted with high purity hydrogenand oxygen. Excellent UV transmission performance, especially in the short-wave UV range, its transmission performance far exceeds that of all other glasses, with a transmittance of 90% at 185nm, which is an excellent optical material in the range of 185-2500nm.

    2.  JGS2 (Ultraviolet Optical Quartz Glass/ Fused Quartz)

    It is an optical quartz glass melted with hydrogenand oxygen. It is a good material in the range of 220-2500nm.

    3.  JGS3 (Infrared Optical Quartz Glass)

    It has high infrared transmission performance, the transmission rate can reach more than 85%. It is an optical material with a wavelength range of 260-3500nm.

    Besides domestic materials, we also offer materials in all grades and specifications from major manufacturers such as Corning, SCHOTT and Heraeus. The material has high purity and uniformity, and the finished product has better and more stable performance. Depending on the customer's custom needs, considering the optical, mechanical and chemical properties of the material, we recommend more suitable materials or other specified materialsfor processing.

     

    PHYSICAL PROPERTIES

    Properties

    Value

    Mechanical Properties

    Density

    2.203g/cm3

    Compressive   Strength

    1100Mpa

    Bending   Strength

    67Mpa

    Tensile   Strength

    48.3Mpa

    Poisson's   Ratio

    0.14~0.17

    Young’s   Modulus

    72000Mpa

    Rigidity   Modulus

    31000Mpa

    Mohs   Hardness

    5.5~6.5

    Thermal Properties

    Deformation   Point

    1280℃

    Softening Point

    1680℃

    Annealing Point

    1210℃

    Specific Heat (20~350℃)

    670J/kg.℃

    Thermal Conductivity (20℃)

    1.4W/m.℃

    Coefficient   of thermal expansion

    5.5×10-7cm/cm.℃

    Hot   Work Temperature

    1700~2000℃

    Short-time   Use Temperature

    1300℃

    Long-time   Use Temperature

    1100℃


    Electrical Properties

    Resistivity

    7×107Ω.cm

    Dielectric   Strength

    250~400Kv/cm

    Dielectric   Constantε

    3.7~3.9


    Dielectric   absorption coefficient

    <4×104

    Dielectric   loss coefficient

    <1×104


    Refractive   Index

    1.45845


    Optical Property

    1.jpg


    CHEMICAL PROPERTIES

    Quartz glass is a chemically stable material that does not react with water, salt solutions and most acids, only hydrofluoric acid can corrode quartz glass. Quartz glass is very sensitive to all alkali and alkaline earth compounds, the extremely slight traces of these compounds willcause the crystallization of quartz glass at high temperatures.


    Solution

    Treatment condition

    Corrosion capacity

    H2O

    95℃ 45 Hours

    1~2×10-7g/cm2

    98%H2SO4

    20℃ 2 Hours

    1.4×10-8 g/cm2

    60%HNO3

    20℃ 2 Hours

    5.0×10-8 g/cm2

    36%HCl

    20℃ 2 Hours

    15×10-8 g/cm2

    5%NaOH

    100℃ 10 Hours

    1.35×10-3 g/cm2

    1%KOH

    98℃ 2 Hours

    68×10-6 g/cm2


    Typical Applications

    lTemperature resistant sight glasses

    l  Front windows for UV lamps

    l  Sight glass for flame monitoring

    l  Material for mechanical quartz components

    l  Protective sight glass windows

    l  Glass for UV-disinfection applications

    l  UV-drying / curing systems

    l  Windows for the chemical industry

     

    Welcome to contact us for more optional material!


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