What is alumina and Alumina ceramics
·Aluminum
1 Aluminum is a good conductor of electricity and heat, and the crystal form of alumina is suitable for use as abrasive materials and cutting tools because of its high hardness.
2 By hand, it accounts for as high as 2054 ℃, so it is a relatively good refractory material. Can be used as analytical reagent Dehydration of organic solvents. Adsorb all organic Reaction catalysts, abrasives, polishing agents, raw materials for aluminum smelting, refractory materials.
3. Alumina is the reason why metal aluminum is not easily corroded in the air. Pure metal aluminum reacts easily with oxygen in the air to form a dense film covering the surface of aluminum exposed to air. This thin film prevents further oxidation of the aluminum. The thickness and properties of this oxide film can be enhanced by a process called anodization.
In addition, alumina can also be used as a defluorination agent for high fluoride drinking water (large defluorination capacity), a defluorination agent for circulating alkanes in the production of alkyl benzene, a deacidification regenerating agent for transformer oil, used in oxygen production industry, textile industry, Gas drying in the electronic industry, drying of automatic instrument air, as desiccant and purifying agent in chemical fertilizer, petrochemical drying and other industries (dew point can reach -40 degrees), in the air separation industry, pressure swing adsorption dew point can reach -55 degrees. It is a high-efficiency desiccant for deep drying of trace water, so it is also suitable for dry and heatless regeneration devices.
·Alumina ceramics
Alumina ceramics is a very wear-resistant precision ceramic material, which is widely used in all walks of life. The main molding methods of alumina ceramic products are: dry pressing, isostatic pressing, injection molding and casting. Different product shapes, sizes, complex shapes and precision products require different molding methods. High temperature sintered alumina ceramic products can only be machined using a diamond grinding process. Alumina ceramic material has extremely high hardness and wear resistance, strong corrosion resistance, high temperature resistance, corrosion resistance and biological inertness. In addition, alumina sintered at high temperature can be highly polished and is widely used in many fields.
Alumina ceramic tubes are mainly formed by isostatic pressing. This molding method has good strength and is convenient for handling and direct machining. In addition, the isotropic density of the green body is uniform, the stress in the green body is small, the defects such as cracking and delamination of the green body are reduced, and the deformation of the sintered product is small.
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