Quartz heating tube system is widely used in various far-infrared heating equipment, because the planning and accounting is difficult, the use of quartz tube heating system is subject to certain constraints, the key is to select the appropriate quartz tube. Quartz tube is a special industrial technology glass made of silica, which is a very good root material. Quartz glass has a series of excellent physical and chemical functions.
Used in electric fire barrels, electric ovens, electric heaters, to play a role in heating. Quartz tube should be used for closed tube diffusion, because the quartz tube can withstand high temperatures of about 1250 °C, and will become very soft and sticky above 1800 °C, and can be made into the desired shape.
On the other hand, because the material selected for quartz tube is special grade crystal stone, high purity, containing few harmful impurities, about diffusion, preparation of alloys, etc. can ensure quality, so closed pipe diffusion often uses quartz tube. Preparation of quartz tube: according to the different diameters of diffused silicon wafers, select the inner diameter, wall thickness and other parameters of the quartz tube.
The quartz tube is a milky white quartz glass tube processed by a special process, with a resistance material as a heating element, because the milky white quartz glass can absorb almost all visible light and near-infrared light from the heating wire radiation, and can be converted into far-infrared radiation. However, the industrial red outer wire heating tube basically screens the milky white quartz tube, because its material is relatively brittle, so it cannot constitute a long milky white heating tube. And the milky white color has a shading effect, which blocks its heat.
The relevant technical functions are as follows: 1. High temperature resistance The softening point temperature of quartz glass is about 1730 °C, which can be used for a long time at 1100 °C, and the short-term Z high application temperature can reach 1450 °C 2. Corrosion resistance In addition to hydrofluoric acid, quartz glass simply does not react chemically with other acids, and its acid resistance is 30 times that of ceramics and 150 times that of stainless steel, especially the chemical stability at high temperatures, which is incomparable with any other engineering data. 3. Good thermal stability The thermal expansion coefficient of quartz glass is extremely small, and it can withstand severe temperature changes, and the quartz glass is heated to about 1100 °C, and it will not burst when put into room temperature water. 4. Good light transmission function Quartz glass has good light transmission function in the entire spectral band from ultraviolet to infrared, and the visible light transmittance is above 93%, especially in the ultraviolet spectral region, and the Z large transmittance can reach more than 80. 5. Good electrical insulation function The resistance value of quartz glass is equivalent to 10,000 times that of ordinary glass, which is a good electrical insulation data and has good electrical function even at high temperatures.
