Quartz glass tube is a special industrial technology glass made of silica, which is a very good basic material. Quartz glass has a series of excellent physical and chemical properties.
　　1. It has the good thermal stability, high temperature resistance. The softening point temperature of quartz glass is about 1730℃, which can be used for a long time at 1100℃, and the temperature of short time use can reach 1450℃.
　　2. It has the good light transmission performance. Quartz glass has good light transmission performance in the entire spectral band from ultraviolet to infrared, and the visible light transmittance is more than 93%, especially in the ultraviolet spectral region, the transmittance can reach more than 80%.
　　3. It has the good electrical insulation performance. The resistance value of quartz glass is equivalent to 10,000 times that of ordinary glass, which is a good electrical insulation material and has good insulation properties even at high temperatures.
　　4.  It has the corrosion resistance. In addition to hydrofluoric acid, quartz glass almost does not react with other acids, and its acid resistance is 30 times that of ceramics, 150 times that of stainless steel, especially its chemical stability at high temperatures, which is unmatched by any other engineering materials.
　　5. The thermal expansion coefficient of quartz glass is very small, can withstand drastic temperature changes, the quartz glass is heated to about 1100℃, and will not burst into normal temperature water.
　　6. Disadvantages: fragile.