Silicon carbide ceramic is a high-strength, high-hardness, high-temperature-resistant ceramic. It can still maintain high bending strength when used at 1200 ℃ ~ 1400 ℃. Silicon carbide ceramic has good thermal conductivity, oxidation resistance, electrical conductivity and high Impact toughness is a good high temperature structural material. Can be used in rocket tail nozzles, thermocouple sleeves, furnace tubes and other high-temperature working parts, heat exchanger materials, grinding wheels, abrasives.
Consistency in quality is a requirement for high performance silicon carbide ceramic powder
Compared with metals and plastics, ceramic materials have excellent high temperature resistance, corrosion resistance, wear resistance and good electrical properties. They are widely used in cutting-edge scientific and technological fields, such as space technology, marine technology, and biological engineering. A basic feature in the ceramic manufacturing process is the formation and firing of powder raw materials to form polycrystalline sintered bodies. The quality of the ceramic powder directly affects the quality of the final product. Director Huang said that the most restricted product of all ceramic products is powder, as is silicon carbide ceramics. For now, the most important thing about powder is the consistency of its quality. "As a single path, the performance of powder may be better than imported powder, but if it is mass-produced, some problems will occur. For example, its surface area is unstable. " Therefore, the requirements for powder production of ceramic products are consistent quality.
Atmospheric pressure sintering is a comparatively advantageous sintering method in the industrial preparation of silicon carbide ceramics.
There are many methods for sintering silicon carbide ceramics, including pressureless sintering (normal pressure sintering), hot-pressing sintering and reaction sintering. Different sintering methods have their own advantages. However, with the rapid development of science and technology today, there is an urgent need to improve the performance of silicon carbide ceramics, continuously improve manufacturing technology, and reduce production costs. Atmospheric pressure sintering is the best method in the industrial sintering process of all ceramics, especially for silicon carbide ceramics and structural ceramics.
Critical equipment requirements for silicon carbide ceramic production
The requirements for equipment in the production of silicon carbide ceramics are better for online monitoring and performance control. "The cost of ceramics is very high. If unqualified products are found, these well-controlled equipment can be checked for errors in time and applied. This technology can reduce production costs early. In addition, the sintering equipment is the most important in the sintering and preparation process, and the reliability of the equipment itself is also a key.