Alumina is a common inorganic non-metallic material, widely used in industry, construction, electronics, medicine and other fields.
Alumina is a white or off-white powder with a molecular formula of Al2O3 and a molecular weight of 101.96. It is a compound composed of aluminum and oxygen, which has a high melting point and hardness. Alumina is a very important industrial raw material, which is widely used in ceramics, glass, electronics, medicine and other fields.
Physical properties of alumina
The physical properties of alumina mainly include density, hardness, thermal stability, optical properties and so on. The density of alumina is 3.9-4.0g/cm3, the hardness is Mohs hardness 9, the thermal stability is high, and the melting point is 2054℃. In addition, alumina also has good optical properties and is an important optical material.
Chemical properties of alumina
The chemical properties of alumina mainly include the reaction performance with different chemical substances, acid and alkali. Alumina reacts with acid to form aluminum salt and water, and with alkali to form aluminum hydroxide and water. At the same time, alumina also has the properties of acidic oxides, which can react with many chemicals.
Preparation method of alumina
The main preparation methods of alumina are chemical method, physical method and so on. The chemical method is mainly through the neutralization reaction of aluminum salt and hydroxide to get aluminum hydroxide, and then through high temperature burning to get aluminum oxide. The physical method is mainly through the ore decomposition, distillation, crystallization and other steps to obtain alumina.
Alumina application field
Alumina is widely used in industry, construction, electronics, medicine and other fields. In the industrial field, alumina is used in the manufacture of ceramics, glass, coatings and so on. In the construction sector, alumina is used to manufacture doors, Windows, curtain walls and so on. In the electronics field, alumina is used to manufacture circuit boards, electronic components, etc. In the pharmaceutical field, alumina is used in the manufacture of drugs, medical devices and so on.
The development prospect of alumina
With the continuous development of science and technology, the application field of alumina is more and more extensive. In the future, with the rapid development of new materials, new energy and other fields, the demand for alumina will continue to increase. At the same time, with the continuous improvement of environmental protection requirements, the production technology of alumina will continue to improve, and more environmentally friendly, efficient and energy-saving production methods will become the development trend.
Alumina is an important inorganic non-metallic material, which has a wide range of uses and important economic value. In the future, with the rapid development of new materials and new energy and other fields, the demand for alumina will continue to increase, while the production technology of alumina will continue to improve, and make greater contributions to the development of human beings.
article source: https://www.hruimetal.com/news/aluminium-oxide/