Alumina ceramic is a very hard ceramic that resists wear and is ideal for wear insert products. It is commonly used as a high-temperature electrical insulator, a high-purity alumina that provides better resistivity. It also has good resistance to acids and alkalis, even at high temperatures, which makes it excellent for resistance to corrosive substances. Some common applications include: electronic components and substrates, high temperature electrical insulators, high voltage insulators, laser tubes, machine components, mechanical seals, precision shafts and shafts in high wear environments, roller and ball bearings, sealing rings, semiconductor components, shooting Nozzles, thermocouple tubes, buckle discs, valve seats, wear components, wires and other fields.

Alumina ceramics have high hardness. In the field of ceramics, the hardness of alumina is medium, and its Rockwell hardness is HRA80-90. Although not as hard as silicon carbide and silicon carbide, it is much harder than cemented carbide and stainless steel. This is also an important reason why it is selected as a wear-resistant part. Alumina ceramics are light in weight, and the density of ceramic materials is generally not high. The same is true for alumina ceramics. Its density is 3.5g/cm3, which is only equivalent to 50% of iron, so if some parts made of iron are replaced with alumina, their weight will be greatly reduced. The wear resistance of alumina ceramics is good, and the wear resistance of alumina ceramics is equivalent to 266 times that of manganese steel and 171.5 times that of high chromium cast iron.

Alumina has a high melting point and high hardness. Due to the relatively large thermal expansion coefficient, the thermal shock resistance is reduced. Alumina is an electrically insulating material with high resistivity that increases with purity. The good chemical stability of alumina results in high corrosion resistance. Insoluble in water, only slightly soluble in strong acid and strong alkali solutions. Tests have shown that the low chemical solubility of alumina ceramic components makes it highly chemically resistant.