As one of the hardest materials in the world, silicon nitride ceramics have been applied in many industries. In recent years, with the development of industry, more and more companies have better and better technology for producing silicon nitride ceramics. So today Here are the properties of silicon nitride ceramics under popular science, so that both the manufacturer and the acceptance unit can be used as a reference.

First, silicon nitride ceramic is a very high temperature resistant material. This substance has no melting point under normal pressure. When the temperature reaches 1870℃, it will be directly decomposed. In actual use, once the normal pressure When the lower temperature reaches 1200 degrees Celsius, the C mechanical hardness of silicon nitride ceramics will decrease.

Second, as one of the hardest materials in the world, silicon nitride ceramics have high hardness and wear resistance, and have a very low friction coefficient. It can be said that the surface is very smooth and does not require professional polishing.

Third, the third advantage of silicon nitride ceramics is that it has high thermal shock resistance. For example, when the thermal shock from daily room temperature to 1,000 degrees Celsius is hit, silicon nitride ceramics will not crack at all, and Silicon nitride ceramics have a high thermal conductivity and a relatively small thermal expansion coefficient.

Fourth, the high corrosion resistance of silicon nitride ceramics is due to its very strong chemical stability, and basically does not react with any inorganic acid, except for hydrofluoric acid, which means that silicon nitride ceramics have high resistance. Acidic ability, and silicon nitride ceramics are not easy to be oxidized.

Fifth, there is another characteristic of silicon nitride ceramics that needs attention, that is, it is relatively brittle, so when silicon nitride ceramics are actually used, silicon nitride fibers are used to increase the toughness of silicon nitride ceramic materials.

The five points just mentioned are the basic characteristics of silicon nitride ceramic materials. With the innovation of silicon nitride ceramic technology and the actual use environment, specific silicon nitride ceramic materials will have other characteristics, so no matter Whether it is production or acceptance, you should understand the above-mentioned knowledge.