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 HOME Technical Know-How Characteristics of Quartz |
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| Fused quartz was originally developed for high-performance lamps by GE (General Electric) but its excellent chemical stability and ultra high purity and heat resistance enabled it to be applied in a wide range of fields where highly pure materials are required, such as semiconductors and optical fibers, as well as lamps. Unfortunately, in Korea , there is no place to produce highly pure quartz, and therefore domestic industries heavily depend on imports, which are used only in certain fields because of its high prices.
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 Purity |
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| Transparent quartz is made by melting silica at high temperature and therefore contains an extremely small amount of impurities. Opaque quartz is made from good quality quartzite, with 99.99% or higher purity of SIO2. |
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? Coefficient of Thermal Expansion |
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| With low coefficient of thermal expansion of 5.5 x 10-7/cm.℃, it features a high thermal impact property against rapid heating and rapid cooling and can be used for furnaces and chambers in the high-temperature semiconductor process as high as 1,000℃. |
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Specific Heat and Thermal Conductivity |
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| It features the specific heat of 890~1,100 J/Kg (20~1,000℃), and the thermal conductivity of 1.3 W/MK at 0℃ and of 1.5 W/MK at 100℃.
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Translucence |
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| Transparent quartz allows the penetration of light in the wavelength of 0.18㎛ of ultraviolet to 4㎛ of infrared, and is widely used for illumination, optical lens, optical fibers, etc |
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? Electromagnetic Insulating Property |
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| Since it does not contain any alkali, it has little loss of inductors at every frequency and exerts its excellent properties at ultra low frequency. It is widely used as insulation in special gauges or communication equipment. |
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