α-Alumina (α-Al2O3) has a wide range of applications. In the future, products will be upgraded towards high purity and small particle size.

α-Alumina, commonly known as corundum, with the molecular formula α-Al2O3, refers to the α-form of alumina. Its appearance is white crystal powder, insoluble in water and difficult to dissolve in acid. According to different purity and functions, α-alumina can be divided into ordinary α-alumina, high-purity α-alumina, nano-α-alumina, catalytic carrier α-alumina, etc.

At present, the main method for producing α-alumina is the Bayer method, which uses bauxite powder as raw material and mixes it with sodium hydroxide solution under high temperature conditions to form a sodium aluminate solution, which undergoes solid-liquid separation, dilution, pressure reduction, etc. A method of generating crystalline α-Al2O3 and then calcining it at high temperature to generate α-alumina; the hydrothermal treatment method refers to using aluminum hydroxide as raw material, adding a flux and melting and precipitating to generate α-alumina in the presence of a mineralizing agent. method. Among them, the Bayer process is the most commonly used method for industrial production of α-alumina.

According to the “China α-Alumina (α-Al2O3) Market Monitoring and Future Development Prospects Research Report 2023-2027” released by the Industrial Research Center It shows that α-alumina has the advantages of uniform particle size distribution, good formability, stable crystal phase, high temperature resistance, good electrical insulation, good dimensional stability, and high hardness (second only to diamond and emery). It can be used as grinding materials, sintering raw materials, filling materials, etc. for catalyst carriers, ceramic filters, ceramic IC substrates and other ceramic materials, fused alumina, ceramic fibers, synthetic spinel and other refractory materials, as well as coatings, pigments, catalysts, decontamination Mold agent and other product manufacturing scenarios, terminal application fields include electronics, plastics, ceramics, rubber, construction, petrochemicals, aerospace, national defense and military industries, etc., with broad application prospects.

With the rapid development of the downstream market, domestic demand for α-alumina continues to increase, and the industry has broad prospects for development. At the same time, as the domestic α-alumina application field continues to expand into high-tech fields such as automobiles, electronics, and aviation, its requirements continue to upgrade, and products are moving towards higher purity, smaller particle size, and better activity. develop. Therefore, in the future, local companies will need to continue to improve their technical level and increase research and development of high-performance α-alumina. There is huge room for industry growth.

At present, domestic companies entering the α-alumina market mainly include Chinalco Shandong, Zhengzhou Huarun New Materials, Zhengzhou Hongrunfeng New Materials, Zhongxin Aviation Technology, Shandong Lubei Enterprise, Shenzhen Xingyuan Material Technology, Wenzhou Hongfeng Electrical Alloy , Wudi Zhonghai New Aluminum Technology, Sanmenxia Yixiang Aluminum, Shandong Hengtong Crystal Materials, etc. There are many companies, but most of them are small and medium-sized enterprises.

Industry analysts said that α-alumina is a type of alumina with a crystal form of α. It has advantageous properties such as stable crystal phase, high hardness, and high temperature resistance, and is widely used in ceramics, electronics, catalysis and other fields. In recent years, benefiting from the rapid development of terminal applications such as automobiles, electronics, and aviation, the demand for α-alumina has continued to grow. At the same time, as demand continues to escalate, α-alumina is moving towards high purity, small particle size, and high performance. Upgrading, the industry has huge potential for future development.