Alumina use analysis

With the rapid development of China's electrolytic aluminum, ceramics, medicine, electronics, machinery and other industries, the market still has a large room for growth in alumina demand, and alumina production will continue to grow. The alumina industry definition and use analysis compiled in the China Report Hall below.

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Use of alumina

The main components of ruby and sapphire are alumina, which have different colors due to other impurities. Sapphire contains iron oxide and titanium oxide and is blue.

2. The content of alumina is the highest in the main component of the aluminum ore. Industrially, bauxite is purified to alumina by the Bayer process and then converted to aluminum by the Hall-Heroult process.

3. Aluminum reacts with oxygen in the air to form a dense aluminum oxide film that covers the aluminum surface exposed to air.

4. Aluminum is a good conductor of electricity and heat. The crystal form of alumina is suitable for use as an abrasive material and a cutting tool because of its high hardness.

5. Alumina powder is often used as a vehicle for chromatographic analysis.

6. In August 2004, scientists working at 3M in the United States developed an alloy made of aluminum and rare earth elements to produce a tempered glass called transparent alumina.

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Ceramic effect

Alumina is divided into calcined alumina and ordinary industrial alumina. Calcined alumina is an essential raw material for producing antique bricks, while industrial alumina can be used to produce microcrystalline stone. In traditional glaze, alumina is often used for whitening. Since antique bricks and microcrystalline stones have been favored by the market, the amount of alumina is also increasing year by year.

Therefore, alumina ceramics came into being in the ceramic industry. Alumina ceramics are ceramic materials with Al2O3 as the main raw material and corundum as the main crystalline phase. Because of its high mechanical strength, high hardness, low frequency dielectric loss, high temperature insulation resistance, good chemical resistance and thermal conductivity, and other excellent comprehensive technical performance.