The main reasons for the high wear resistance of alumina ceramics

1. Material properties

High hardness: The hardness of alumina ceramics is extremely high, second only to diamond, and much higher than traditional metal materials such as wear-resistant steel and stainless steel. This high hardness makes alumina ceramics excellent in wear resistance and can effectively resist wear and scratches.

Chemical stability: Alumina ceramic wear-resistant parts have good stability to most chemicals such as acids, alkalis, and salts, and are not prone to chemical reactions. This feature gives it a significant advantage in occasions such as chemical industry that require corrosion resistance, and also enhances its wear resistance.

High temperature resistance: Alumina ceramic wear resistant parts can work for a long time in high temperature environments and are not easy to deform or fail. In high temperature working environments, alumina ceramics can maintain their hardness and stability, thereby ensuring that their wear resistance is not affected.

2. Structure and composition

Close-packed hexagonal structure: Alumina ceramics are close-packed hexagonal structures composed of oxygen ions, and aluminum ions are filled in two-thirds of the octahedral gaps. This stable α-Al2O3 structure, which is the same as natural corundum, gives the ceramic material the characteristics of high melting point and high hardness. 

Alumina content: The wear resistance of alumina ceramics is closely related to its alumina content. Generally speaking, the higher the alumina content, the better the wear resistance of the ceramic. High-purity alumina ceramics (such as ceramics with 99% content and above) have more excellent wear resistance.

3. Production process

Powder fineness: The powder fineness of alumina ceramics has an important influence on wear resistance. The finer the powder, the larger the specific surface area, the higher the surface free energy, and the greater the sintering driving force, which helps to form a dense microstructure, thereby improving wear resistance.

Sintering process: A reasonable sintering process is a key factor in ensuring the wear resistance of alumina ceramics. By controlling parameters such as sintering temperature and heating curve, alumina ceramic products with good wear resistance can be obtained.

IV. Application Effect

Alumina ceramic wear-resistant parts perform well in practical applications. For example, under the same working conditions, the use of alumina ceramic wear-resistant parts can extend the service life of the equipment by at least ten times. At the same time, due to its low friction coefficient and good insulation, it can also effectively reduce wear and friction heat and improve the operating efficiency of the equipment.

In summary, the high wear resistance of alumina ceramics is mainly due to its high hardness, chemical stability, high temperature resistant material properties, and reasonable composition and production process. These advantages make alumina ceramics have significant advantages in the field of wear-resistant materials and are widely used in various harsh working environments and usage scenarios. More information in website : www.chemshun.com   office@chemshun.com