1. What is the chemical formula of alumina?
Aluminum oxide is a stable oxide of aluminum, with the chemical formula Al2O3 . It is also called bauxite in mining, ceramics and materials science.
Storage: Store in a sealed and dry manner.
Uses: Used as analytical reagents, dehydration of organic solvents, adsorbents, organic reaction catalysts, abrasives, polishing agents, raw materials for smelting aluminum, and refractory materials.
2. Introduction to the physical properties of alumina
Molecular weight: 101.96
Melting point: 2054℃
Boiling point: 2980℃
True density: 3.97g/cm3
Bulk density: 0.85g/mL (325 mesh~0) 0.9g/ mL (120 mesh ~ 325 mesh)
Crystal structure: trigonal crystal system (hex)
Solubility: insoluble in water at room temperature
Conductivity: room temperature Non-conductive in state
3. The role of alumina in the ceramic industry
The separation of alumina They are calcined alumina and ordinary industrial alumina. Calcined alumina is an essential raw material for the production of antique bricks, while industrial alumina can be used to produce microcrystalline stones. In traditional glazes, alumina is often used for whitening. As antique bricks and microcrystalline stones are favored by the market, the consumption of alumina is also increasing year by year.
Therefore, alumina ceramics emerged in the ceramic industry: alumina ceramics are a kind of ceramics with Al2O₃ as the main raw material. Ceramic materials with corundum as the main crystal phase have the advantages of high mechanical strength, high hardness, small high-frequency dielectric loss, high high-temperature insulation resistance, good chemical corrosion resistance and good thermal conductivity and other excellent comprehensive technical properties.
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