Silicon carbide ceramics are widely used in high-tech industries. Domestic high-end productivity needs to be improved urgently.

Silicon carbide ceramics are ceramic materials that use silicon carbide and organic binders as raw materials and are sintered and formed under the action of additives. Silicon carbide ceramics have excellent rigidity, flexural strength, thermal conductivity, high-temperature strength, wear resistance, corrosion resistance, high-temperature oxidation resistance, low friction coefficient, low thermal expansion coefficient, low density, etc., and are the best ceramic materials for medium and high temperatures. The ceramic material with the best mechanical properties and the best oxidation resistance among non-oxide ceramics.

With the continuous advancement of science and technology, the high-tech industry continues to develop and grow, and the requirements for the mechanical properties, high temperature resistance, and corrosion resistance of materials are becoming increasingly stringent. Against this background, the application fields of silicon carbide ceramics continue to expand and the demand continues to expand. Silicon carbide ceramics can be used to manufacture high-frequency electronic devices, electromagnetic shielding materials, thermal conductive and heat dissipation materials, high-temperature bearings, high-temperature corrosion-resistant parts, abrasives, refractory materials, etc., and are widely used in microelectronics, instrumentation, machinery, automobiles, metallurgy, Chemical industry, petroleum, laser, nuclear industry, aerospace and other fields.

According to the “2020 Silicon Carbide Ceramics Project Business Plan” released by the Industrial Research Center, the preparation process of silicon carbide ceramics mainly includes Chemical method, thermal decomposition method, gas phase method, Atchison method, etc. have higher sintering difficulty and complex production process. Globally, the main suppliers of silicon carbide ceramics include France’s Saint-Gobain and Germany’s SCHUNK Group. These enterprises have high technical level and high product quality, performance and reliability. After continuous development, the scale of my country’s silicon carbide ceramics industry continues to expand, and the number of manufacturing companies continues to increase. Representative companies include Shenyang Xingguang, Luoyang Pengfei, Shandong Jinhong, Weifang Zhida, etc.

There are a large number of silicon carbide ceramic manufacturers in my country, and the overall production capacity of the industry is constantly expanding, and they are distributed in many regions across the country. Among silicon carbide ceramic products, low-end products have low technical thresholds, so a large number of enterprises have gathered in the country. These enterprises are uneven in terms of scale, technology, process, product quality, etc., and rely on price wars to compete for the market; a few outstanding enterprises have passed through technology, With the continuous accumulation of experience, the R&D and innovation capabilities have been continuously enhanced, the technological level has been continuously improved, and the competitiveness has been continuously improved. The development of my country’s silicon carbide ceramics industry has shown a polarized pattern. As downstream application fields gradually shift toward high-tech industries, companies with insufficient strength will be eliminated faster in the future.

Silicon carbide ceramics also have shortcomings, such as high brittleness and easy fracture. In order to improve its toughness, silicon carbide ceramic matrix composites made of high-strength and high-elastic fibers have emerged. Silicon carbide ceramic matrix composite materials have excellent comprehensive properties and can be used in high-speed cutting tools, high-end automobiles, aircraft, rockets, missiles and other fields. The technical barriers to silicon carbide ceramic matrix composites are high. Only a few countries in the world, such as Japan, the United States, and Western Europe, have advanced production processes. Compared with them, my country has a large gap. Market demand relies on imports, and import substitution is urgently needed.

Industry analysts said that silicon carbide ceramics are a type of new material and have a wide range of downstream applications, especially in high-tech industries. The demand for field applications continues to grow, and the future market prospects are broad. After continuous development, the production capacity and technical level of my country’s silicon carbide ceramic industry have been continuously improved. However, in the field of high-end products, domestic demand still needs to rely on imports, especially in the field of silicon carbide ceramic matrix composite materials. Compared with developed countries, my country has Large gap. In the future, the technical level of my country’s silicon carbide ceramic industry needs to continue to improve.