What is alumina ceramics
What is alumina ceramics
Alumina ceramics is an industrial ceramic with high hardness, which can only be processed by diamond grinding. It is made of bauxite and can be processed by injection molding, pressing, isostatic pressing, sliding castings and other methods.
Products made of alumina, where its abrasion, chemical, corrosion, corrosion and resistance to high temperature and bioerodibility make them suitable for medical implants. The classification of alumina ceramics is based on their alumina content, which can vary from 70% to 99.9%. The higher the purity of alumina, the higher its wear and corrosion resistance. In addition, I have to talk about the properties of alumina ceramics. Alumina ceramics are made of white granular materials similar to salt or very fine thick powder. The three general types of alumina are hydrated, calcined and chimeric. Each type has various levels.
The type of alumina changes according to the amount of soda water (Na2O), iron (Fe2O3) and silica (SiO2) added. The ceramic product contains the chemical purity of alumina and the nature of the additives used in the production process. Calcining: To produce calcined alumina, the alumina is heated to 1050°C or 1900°F. Ultra-high temperature heating removes all chemical impurities and water. It is 99.99% pure and has a Moher hardness scale of 9, which is below the diamond (Mohers score is 10). Hydration: Alumina hydrate or alumina hydroxide is used as a glaze because it can maintain the paste slurry and the suspension of bonding quality. Fitting: The flake alumina is produced by heating the alumina to 1650°C or 3000°F. It has high heat, excellent thermal temperature, strength and volume stability. It is formed from sintered balls of calcined alumina, which are crushed to form a powder. Flake alumina has high fire resistance, mechanical strength, wear resistance, chemical purity, dielectric properties and corrosion resistance.
As alumina ceramics are used in more and more places, many people will consider alumina ceramics when buying mechanical equipment parts. The parts of different parts require different materials because of their different functions. Some parts operate in a very harsh environment. They may face high temperature, strong acid and alkali, high pressure, high current, etc., which are extremely destructive and lethal. Therefore, only parts processed with high-performance materials can be used in these environments. Normal operation. At this time, the emergence of alumina ceramics made people shine. It has the properties of high temperature resistance, wear resistance, chemical resistance and high density.
