Alumina ceramics is a ceramic material mainly composed of alumina (Al2O3), which is used in thick film integrated circuits. Alumina ceramics have good conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics are a kind of ceramics with a wide range of uses. Because of its superior performance, it has been more and more widely used in modern society, meeting the needs of daily use and special performance. What are the characteristics of alumina ceramic rollers 1. High hardness. The Rockwell hardness of alumina ceramic roller is HRA80-90, the hardness is second only to diamond, far exceeding the wear resistance of wear-resistant steel and stainless steel. 2. Excellent wear resistance. The wear resistance is equivalent to 266 times that of manganese steel. Under the same working conditions, the service life of the equipment can be extended by at least ten times. 3. Light weight. Its density is 3.6g/cm3, which is only half that of steel, which can greatly reduce the load on equipment.

In the manufacturing process of alumina ceramics
 , the following three requirements should be met: 1. The selected raw materials should be of high purity, and the particles should be as fine as possible;
2. Strictly control the chemical composition. During the manufacturing process, it is necessary to prevent the mixing of impurities and the volatilization of the components themselves, and strictly control the particle size, interface, and pores of the sintered parts to achieve stable quality and reproducibility; 3. Precise shape and size
. Alumina ceramic parts are generally used directly without processing, especially ceramic electronic devices require higher precision. Alumina ceramics and ordinary ceramics are very different in composition and manufacturing process. Alumina ceramics are mostly manufactured by powder sintering method.

Main features of alumina ceramic rollers : high melting point, high hardness, can be made into transparent ceramics, non-toxic, insoluble in water, high strength.