Glass is common in everyone's life, it is extremely wide range of uses, people use a number of electronic products, and television screens, etc. are made of glass, but the type of glass is not the same. Glass is divided into many categories according to the different materials, quartz glass is one of them, it has unique properties and uses, and its use is also very broad, want to understand a glass, in addition to understanding its structural properties, the most important thing is its use. Here is a specific introduction to the various uses of quartz glass.
Introduction of quartz glass
Silicon dioxide single component of the special industrial technology glass. The hardness of this glass can be as large as seven Mohs, with high temperature resistance, low coefficient of expansion, heat shock resistance, chemical stability and good electrical insulation properties, and can transmit ultraviolet and infrared rays. In addition to hydrofluoric acid and hot phosphoric acid, it has good acid resistance to general acids. According to transparency, it is divided into two categories: transparent and opaque. According to the purity is divided into three categories: high purity, ordinary and doped. With crystal, silica, silicide as raw materials, high temperature melting or chemical vapor deposition. Melting methods are electrofusion method, gas refining method.
Quartz Glass Uses
Quartz glass is formed as a result of its melt high temperature viscosity is caused by the results. Used in the production of semiconductors, electric light sources, semi-conductor communication devices, lasers, optical instruments, laboratory instruments, electrical equipment, medical equipment and high temperature corrosion-resistant chemical instruments, chemical, electronics, metallurgy, building materials and national defense and other industries, the application is very broad. High purity quartz glass can be made optical fiber. With the development of semiconductor technology, quartz glass is widely used in various processes of semiconductor production. For example, the straight pull method of polycrystalline silicon into monocrystalline silicon; cleaning tanks used in cleaning; diffusion of diffusion tubes, groove boat; ion implantation with the bell and so on.
Difference between quartz glass and ordinary glass
1, high temperature. The softening point temperature of quartz glass is about 1730 ℃, can be used for a long time at 1100 ℃, the maximum temperature for a short period of time up to 1450 ℃.
2, corrosion resistance. In addition to hydrofluoric acid, quartz glass almost no chemical reaction with other acids, its acid corrosion resistance is 30 times better than acid-resistant ceramics, 150 times better than stainless steel, especially at high temperatures in the chemical stability of any other engineering materials are incomparable.
3, good thermal stability. Quartz glass has a very small coefficient of thermal expansion, can withstand drastic temperature changes, the quartz glass heated to about 1100 ℃, into the room temperature water will not explode.
Quartz glass is widely used because of its chemical stability, and its application range is determined by the nature, only according to the need for different areas, the use of the place is not quite the same. Glass is not necessarily transparent, quartz glass is also divided into transparent and opaque, according to its use can be freely chosen. Quartz is more pure and has relatively more natural components, although it has been processed at a later stage. However, quartz glass also has certain defects, people should understand its advantages and disadvantages, the correct use is the most right.