Alumina ceramics are widely used in the field of lithium battery membrane coating and catalyst carrier because of their excellent physical and chemical properties.

Medical.Alumina is more used to make artificial bones, artificial joints, artificial teeth and so on.Alumina ceramics have excellent biocompatibility, biological inertia, physical and chemical stability, high hardness and wear resistance, and are ideal materials for the preparation of artificial bones and joints.​

High mechanical strength, the flexural strength of alumina ceramic sintered products can reach 250MPa, hot pressing products can reach 500MPa, the strength can be maintained to 900℃ at high temperature

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The Rockwell hardness of alumina ceramics‍ is HRA80-90. The hardness of alumina ceramics is second only to that of diamond, which far exceeds the wear resistance of wear-resistant steel and stainless steel.

Alumina ceramicsare divided into two types: high-purity and ordinary.

After the powder is formed, a biscuit with good shape is obtained, and then the biscuit is heated at a certain temperature. The biscuit undergoes volume shrinkage and finally becomes a compact sintered body. This process is called sintering. The driving force of alumina ceramic green body sintering is mainly the change of powder surface energy, that is, the surface energy of powder decreases, the surface area decreases, and the ceramic densifies. In the process of ceramic sintering densification, material transfer can be carried out through solid phase diffusion, including surface diffusion, grain boundary diffusion, lattice diffusion, etc. Normal pressure sintering is generally used in industry.

After the powder is formed, a biscuit with good shape is obtained, and then the biscuit is heated at a certain temperature. The biscuit undergoes volume shrinkage and finally becomes a compact sintered body. This process is called sintering. The driving force of alumina ceramic green body sintering is mainly the change of powder surface energy, that is, the surface energy of powder decreases, the surface area decreases, and the ceramic densifies. In the process of ceramic sintering densification, material transfer can be carried out through solid phase diffusion, including surface diffusion, grain boundary diffusion, lattice diffusion, etc. Normal pressure sintering is generally used in industry.

In the past few years, the development of industrial ceramic materials has developed to control and manipulate its specific microstructure, which will greatly expand its application scope in all walks of life. Therefore, industrial ceramics are considered to be one of the most effective materials today.

Ceramics are usually composed of commonly available materials, such as carbon, silicon, oxygen and nitrogen.