Quartz glass is a special industrial technology glass c […]
Quartz glass is a special industrial technology glass composed of a single component of silicon dioxide (SiO2). Due to its special physical and chemical properties such as temperature resistance, acid resistance (except hydrofluoric acid and hot phosphoric acid), low expansion, and excellent spectral transmittance, it has become an important material for modern science and technology. It is widely used in the semiconductor industry, optical Communication, electric light source and other high-tech fields, especially in the field of semiconductor technology, quartz glass is an indispensable auxiliary material.
Because quartz glass has a series of excellent comprehensive properties, it is difficult to replace other materials, especially in high-tech fields such as microelectronics, information, laser, aerospace, defense and military, and new electric light sources. It is a national strategic industry and High-purity basic materials that cannot be replaced in the development of pillar industries. According to incomplete statistics, for every 100 million U.S. dollars sold in the world's quartz glass industry, the relevant industries can achieve nearly $ 1 trillion in revenue, thereby promoting the rapid development of high-tech, especially the microelectronics industry, which further drives quartz. The growth of demand in the glass market has now reached an average annual growth rate of more than 30%, which is much higher than the growth rate of general industrial products.
Import situation to be reversed
China's quartz industry started in the 1960s, and gradually developed into a more complete industry in the 1970s. Only in the late 1980s did the quartz glass industry develop rapidly, the technology roots became more mature, mechanical equipment was fully improved and perfected, and quartz A new situation has emerged in the development of the glass industry.
The production scale of domestic quartz enterprises is relatively small. Among the dozens of enterprises, only two have an annual output value exceeding 100 million yuan, and the output value exceeds 10 million yuan. The low-grade products are far behind the needs of the rapid development of high-tech industries such as information and microelectronics in China.
Developed countries have regarded quartz glass as an important part of new materials, giving priority to development and supporting it. China has also included quartz glass as a key support object of the national high-tech industry this time. The quartz glass industry has made great progress. The pillar industries such as microelectronics, information, and national defense and strategic industries require a large amount of quartz glass. At present, the performance of domestic products is far from meeting the requirements, and most of them rely on imported supplies.
In the field of ultra-pure quartz glass products for the microelectronics industry, German Lloyd's has been able to produce 40-inch ultra-large diameter quartz crucibles with a purity (total content of 13 impurity elements) of up to 2 ppm. Up to 500mm, purity below 10ppm, basically no ripple. In the field of optical waveguide-grade quartz cladding tubes for optical fibers, the purity produced by the United States and Germany is higher, the silica content is greater than five 9, and the OH content is ≤1 ppm. In the field of aerospace-grade optical quartz glass used in aerospace technology and ultra-pure synthetic quartz glass used in laser technology, foreign countries can achieve a diameter of 750mm or more and an impurity content of ≤01ppm, which meets the requirements of optical class three.
The market is climbing rapidly
In recent years, due to China's continuous increase in the development of the electronic information industry, it has also promoted the rapid growth of the demand for quartz glass market.
In the field of microelectronics, the demand for quartz products such as quartz glass diffusers, crucibles, instrumentation and other key materials that are expendable is increasing. The demand for quartz diffusers for circuits between 4 inches and 8 inches reached 20,000 pieces per year during the "Eleventh Five-Year Plan" period; 8 inches to 12 inches also increased significantly. Quartz crucibles are divided into electronic and solar grades according to the level of silicon single crystal production. In 2004, the silicon single crystal output was 1,725 tons, solar cell silicon single crystals accounted for about 58%, and the annual market growth rate was 27.5%. The annual output of crucibles has exceeded 100,000, and the market share has continued to increase.
The domestic optical fiber market is increasing at an annual rate of 12%. In 2004, the demand for deposition pipes and casings was 300 tons, and domestic production was only 20 tons.
China has more than 40 electric light source quartz glass manufacturing enterprises, with nearly 100 continuous furnaces. The average market growth rate during the "Eleventh Five-Year Plan" period was about 20%, and the total output of quartz tubes was about 53,500 tons.
Standards are gradually mature
The article "Analysis and Prospect of China's Industrial Glass and Special Glass Standard System" written by experts such as China Engineering Materials Research Institute senior engineer Shi Xinyong, Chen Lu, Wang Rui, Wu Jie, Sun Yunrong pointed out: The current status of China's quartz glass standards There are 29 standards, 20 product standards (1 national standard), 9 method standards (5 national standards), and 4 new product standards included in the 2008 industry standard formulation plan. 2008 was the peak period for the review of quartz glass standards, and 12 standards were revised.
With the rapid development of China's economy, some new glass varieties and new technologies have been formed and are being industrialized. Products in resource recycling, energy conservation, and environmental protection are changing with each passing day. China has begun to spray low-temperature glass and lead-free sealing glass. Scientific research and application promotion of anti-microwave radiation glass, electromagnetic shielding glass and other products. It is planned to incorporate mature products into the standard as soon as possible according to progress. The acceptance of new products can optimize the structure of China's industrial glass and special glass varieties.
Quartz glass devices are divided into three categories: the first category is quartz glass instruments, including fractionation purification towers, pure water distillation towers, diffusion tubes for semiconductor industry, reagent purification equipment, and evaporators; the second category is quartz glassware containers. There are hundreds of varieties and specifications with a wide range of uses, from laboratories to semiconductor integrated circuit production. The third type is quartz glass profiles, which include plates, sheets, flanges, rods, sticks, rods, etc. Single-chip quartz materials, lithographic substrates, optoelectronic display boards, and support rods for fiber drawing are mainly used for large chip processing. Quartz glass device products account for more than 1/3 of the total output value of the quartz glass industry.
In recent years, the quartz glass industry has greatly improved the quality of production technology and equipment. It has made outstanding progress in the processing of quartz glass devices, and has made breakthroughs in the development of quartz devices for solar cells. It has been confirmed by large-scale enterprises and companies that produce solar cells in China. The produced quartz devices fully meet the requirements and the product quality has reached International advanced level. From the perspective of the development of related industries, China's quartz glass will still maintain an average annual growth rate of 15% to 20%. The growth rate of quartz glass for the information industry is still greater than that for electric light sources.