Polycrystalline silicon ingot furnace crystal growth test using quartz rod
Quartz rod for one of my company advantage products, specializing in the production of high purity transparent quartz rod, the annealing can do and deep processing. Existing specifications 1-50mm, with the advanced even melting method combined with a unique formula to produce high-quality quartz rod surface finish, the bubble gas line is strictly controlled, the curvature does not exceed a total length of 3 ‰. By production of fused Law, such a transparent quartz rod has the characteristics of high purity, high temperature, thermal expansion coefficient. Minimal coefficient of thermal expansion of the quartz rod, a glass only 1/10-1/20, highly resistant to rapid thermal quench resistance, transparent quartz rod in the the 1100 ℃ heartburn 15 minutes in an electric furnace, then placed in cold water, repeated test also does not rupture, the softening point temperature of the quartz rod is about 1730 ° C, continuous use temperature of 1100-1200 ° C, the short maximum use temperature up to 1450 ° C, due to the high purity, quartz rod has a low temperature resistance, thermal expansion coefficient the characteristics, are widely used in the single-ended halogen bridging rod, fiber optic lighting, quartz fiber manufacturing, the semiconductor wafer processing.
The quartz glass is manufactured by silica special industrial glass is a very good base material, the performance of the quartz glass are as follows: 1, high temperature resistant quartz glass has a softening point of 1730 degrees Celsius, can be used at 1200 ° C for a long time The short-term maximum use temperature of 1450 degrees Celsius 2, corrosion resistance except hydrofluoric acid, the quartz glass is almost not occur with other acids, chemical reactions, its acid capacity is 30 times that of the ceramic, stainless steel, 150-fold, especially at high temperatures under chemical stability, unmatched by any other engineering materials. 3, good thermal stability, the expansion coefficient of the quartz glass is very small, can withstand severe temperature changes, the quartz glass is heated to 1100 degrees Celsius, and placed in water at room temperature and will not burst, good transparency quartz glass hey ultraviolet to infrared, have better light transmission properties of the entire spectral band, the visible light transmittance of more than 93%, especially in the UV spectral region, the maximum transmittance can be achieved more than 80%. 5, good electrical insulation resistance value of the quartz glass is equivalent to one million times that of ordinary glass, is an excellent electrical insulating material also has good electrical properties, even at high temperatures. Quartz glass because of the excellent physical and chemical properties, it is widely used in electric light sources, semiconductor, optical communications, military, metallurgy, building materials, chemical, machinery, electricity, environmental protection and other fields.
