Why do alumina ceramics have high wear resistance?

Alumina ceramics have high wear resistance, mainly due to their unique microstructure and chemical properties.

First of all, the microstructure of alumina ceramics is a polycrystalline structure composed of particles and cells, which makes it have high mechanical strength. Second, alumina ceramics is a very high hardness material, its hardness is similar to diamond, difficult to be worn, so it has a high abrasive resistance. Third, the chemical properties of alumina ceramics are very stable, almost resistant to the erosion of all acids, bases and salts and other chemical substances, and almost unaffected by any form of chemical corrosion.

Alumina ceramics are divided into different purity grades, and the content of Al2O3 is higher in the higher purity alumina ceramics.  In general, the higher the aluminum content, the better its wear resistance.

In addition, alumina ceramics also have very good thermal stability, can maintain excellent performance at high temperatures, which makes it in many wear-resistant working conditions can play an excellent performance.

Therefore, these characteristics of alumina ceramics make them perform well in many environments where wear resistance is required.