Alumina ceramic lining for microcrystalline wear-resistant chemical industry is a special corundum ceramic made of alumina as the main raw material, rare metal oxide as a flux, and baked at a high temperature of 170 degrees. Alumina ceramics for chemical industry: high alumina content, compact structure and unique properties, so it is called alumina ceramics for special chemical industry. The ceramic material is a close-packed hexagonal structure composed of oxygen ions. Aluminum ions fill two thirds of the octahedral gap, which is the same stable structure as natural corundum. Therefore, ceramics have a high melting point, high hardness, and excellent wear resistance. The hardness of the ceramic patch is higher than HRA85, second only to diamond. The surface of the ceramic patch is smooth and the friction coefficient is small. The wear resistance of the ceramic patch is very ideal. Especially in high temperature oxidation or corrosive media, the performance of ceramic patches is significantly better than other metal materials.
Alumina ceramics for chemical industry is a ceramic material mainly composed of alumina (Al2O3), which is used in thick film integrated circuits. Alumina ceramics for chemical industry have good electrical conductivity, mechanical strength and high temperature resistance. It should be noted that ultrasonic cleaning is required. Alumina ceramics for chemical industry is a widely used ceramics. Due to its superior performance, it is more and more widely used in modern society, meeting the needs of daily use and special performance.
The technique of densifying the granular ceramic body and forming the solid material is called sintering. Sintering is a method to remove the voids between the particles of the green body, remove a small amount of gas and organic impurities, and grow the particles and combine with each other to form a new substance. Electric furnace is the most widely used combustion heating device. In addition to atmospheric sintering, it also includes pressureless sintering, hot press sintering and hot isostatic sintering. Although continuous hot-press sintering can increase output, the cost of equipment and molds is too high. In addition, due to axial heating, the product length is limited. Hot isostatic pressure sintering uses high temperature and high pressure gas as the pressure transmission medium, which has the advantages of uniform heating in all directions and is very suitable for sintering of complex products. Due to the uniform structure, the performance of the material is 30-50% higher than that of cold press sintering. 10-15% higher than conventional hot press sintering. Therefore, some high-value-added alumina ceramic products for chemical industry or special components required for national defense and military industries, such as ceramic bearings, reflectors, nuclear fuel and barrels, are all hot isostatically burned.