Raw material is silicon dioxide thin film quartz glass, quartz tuo, quartz glass, solar cells and light communication cable high-performance materials such as the main raw material, and one of the main encapsulation materials of semiconductor industry, also can be used for the preparation of monocrystalline silicon and polycrystalline silicon, and so on, has the very high value added, is the important foundation of today's high and new technology products, is a necessary condition for the sustainable development of a national high and new technology, play an important role in the national economy.
I. raw materials of quartz glass
Silica glass is an amorphous material with a single component of silica.The high purity quartz sand is the raw material of quartz glass after purifying and processing.
Synthetic quartz glass material is formed by hydrolysis deposition of liquid compounds containing high purity silica sand in oxyhydrogen flame.At present, there are two main production methods of synthetic quartz glass: one is horizontal vapor deposition;The other method is vertical vapor deposition.The vertical gas-phase deposition method for the production of synthetic quartz glass has the characteristics of high process stability, good appearance quality and high uv transmittance.
Ii. High-end applications of quartz glass
Quartz glass is known as the "crown" of glass materials. Its comprehensive performance is the highest among glass materials. Its products are diversified in form and widely used in high-end fields such as optical communication, semiconductor, solar energy and aerospace.
According to the report of the quartz industry association, the global quartz glass market scale exceeded 20 billion yuan in 2015. From the perspective of the global market, high-end application fields such as optical fiber and semiconductor account for the dominant market, accounting for about 80% of the total demand.
Optical communication field
With the increasing demand of information flow and high-capacity and high-efficiency direct circuit, the rapid development of optical fiber industry has been promoted. Meanwhile, the growth of quartz prefabricated rod and quartz tube industry, the main upstream raw materials, has also been promoted.According to the data of China fiber optic cable industry association, the sales scale of China's fiber optic industry has increased by 184% in the past five years, and the growth rate is on the rise, with a year-on-year growth of 62% in 2013.With the further requirements of the ministry of industry and information technology for China's network access capacity in the national "twelfth five-year" plan, the market demand for optical fiber will continue to heat up, and at the same time drive the rapid development of quartz glass industry.
Semiconductor field
Due to its special physical properties of temperature resistance, acid resistance, low expansion and excellent pipe permeability, high-purity quartz material has met the stringent requirements of the semiconductor industry for the content of alkali metals and heavy metals in vehicle materials and become an indispensable material in this field.The diffusion tube and bell jar are used in the process of semiconductor diffusion, oxidation, deposition and etching.With the improvement of technology, quartz material has been widely used in the semiconductor production process, such as the main substrate for photomask substrate in flat panel display technology and the key material for high-end high-power lighting tools.
Photovoltaic field
Solar energy is the only source of energy that can ensure the future demand of human beings. Therefore, in order to more effectively exploit and use solar energy, countries all over the world are constantly developing solar photovoltaic module technology to make the best use of this "inexhaustible" energy.The crucible made of quartz glass is widely used in the process of solar crystal refining and the production of silicon wafers and silicon rods related to solar cells due to its clean, homogeneity and high temperature resistance.
Aerospace and other fields
Due to the aviation, aerospace craft key parts material for high strength, dielectric constant and small electrical loss, high temperature resistant, low expansion coefficient and corrosion and so on a series of harsh conditions, quartz fiber because of its excellent performance and is made into quartz material such as cotton, stone YingBu for making the aircraft nose radome, the rocket nozzle, space, the spacecraft's ablative materials.
Quartz glass has high purity, suitable light transmittance and refractive index, good optical properties, excellent light transmittance and heat resistance from ultraviolet to infrared region, etc., widely used in optical coating and making electric light source foam.
conclusion
In recent years, the rapid development of China's optical communication industry, semiconductor industry, solar photovoltaic industry and aerospace industry provides a broader market for the development of China's quartz glass industry, and also drives China's quartz glass products to climb a higher level.
