crucible/thick-walled quartz tube/thick wall quartz tube

typical characteriastics of high purity ,good spectral transmission.
Thick-walled quartz tube as a special industrial technology of glass, thick-walled quartz tube diameter in terms of the relative wall thickness, usually 3-10mm. Thick-walled quartz tube types are: cylindrical inner circle, foreign inner circle, outer circle within the square, fan-shaped hole. Thick-walled quartz tube is widely used in boiler tubes, instrumentation, semiconductor, electric lighting, machinery and other fields. Product has the following series of excellent physical and chemical properties. 1. Temperature: softening point temperature of about 1730 degrees Celsius, 1100 degrees Celsius in a long time use, short-term maximum temperature up to 1450 degrees Celsius; 2. Anti-corrosion: In addition to hydrofluoric acid, is an almost non-acid and other substances a chemical reaction, especially in the high temperature chemical stability, is in any other engineering materials can not be compared; 3. Thermal stability: The thermal expansion coefficient of quartz glass, is extremely small, able to withstand drastic temperature changes; 4. transmittance good performance: quartz glass in the entire ultraviolet to infrared spectral bands have a good light transmission properties, visible light transmittance of 93% or more, especially in the ultraviolet spectral region, the largest up to 80% or more transmittance; 5. Good electrical insulation properties: resistance of quartz glass is equivalent to ten thousand times the normal glass is an excellent electrical insulation materials, even at high temperatures also has good electrical properties.
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