What are the basic properties of alumina ceramics?

As one of the hardest materials in the world, alumina ceramics have been applied in many industries. With the development of industry in recent years, the technology for producing alumina ceramics is getting better and better. More and more companies, so come today What are the properties of alumina ceramics under the popular science, so that whether it is a production enterprise or an acceptance unit can make a reference.

First, alumina ceramic is a very high temperature resistant material, this substance has no melting point under normal pressure, it will decompose directly when the temperature reaches 1870 ℃, and in actual use, once under normal pressure When the temperature reaches 1200 degrees Celsius, the C mechanical hardness of the alumina ceramic will decrease.

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

Third, the third advantage of alumina ceramics is that they have high thermal shock resistance. For example, from the daily thermal shock of room temperature to 1,000 degrees Celsius, alumina ceramics will not crack at all, and alumina The thermal conductivity of ceramics is high and the coefficient of thermal expansion is relatively small.

Fourth, the corrosion resistance of alumina ceramics is due to its strong chemical stability, which basically does not react with any inorganic acids, except for hydrofluoric acid, which means that alumina ceramics have a high acid resistance And, alumina ceramics are not easy to be oxidized.

Fifth, there is another characteristic of alumina ceramics that needs to be noted, that is, it is relatively brittle, so when actually using alumina ceramics, silicon nitride fiber will be used to increase the toughness of the alumina ceramic material.

The five points just mentioned are the basic characteristics of alumina ceramic materials. With the innovation of alumina ceramic technology and the actual use of different environments, specific alumina ceramic materials will have other characteristics, so whether it is production or Acceptance should be based on the knowledge mentioned above.