Aluminum oxide powder is made from industrial aluminum hydroxide or aluminum oxide as raw materials

Aluminum oxide powder is made from industrial aluminum hydroxide or aluminum oxide as raw materials. However, unlike silicon carbide and black corundum, aluminum oxide powder is calcined at high temperatures in different formulations. Aluminum oxide powder is a white amorphous powder that is difficult to dissolve in water, odorless, tasteless, strong chemical stability, high purity, significant real ratio, and good insulation performance.

Characteristics and functions of aluminum oxide powder

Aluminum oxide powder has the characteristics of high temperature resistance, corrosion resistance, and stable properties. It is commonly used as analytical reagent, dehydration of organic solvent, adsorbent, organic reaction catalyst, abrasive, polishing agent, raw material for aluminum smelting and refractory.

Five characteristics of high-purity aluminum oxide powder:

• Chemical corrosion resistance;
• High purity aluminum oxide, with an aluminum oxide content greater than 99%;
• High temperature resistance, normal use at 1600 ℃, short-term use at 1800 ℃;
• Resistant to sudden cold and heat, not prone to cracking;
• Adopting injection molding with high density.

The purpose of aluminum oxide powder:

By introducing aluminum oxide powder, we can understand some basic uses of aluminum oxide powder. Aluminum oxide powder is suitable for surface beautification treatment of various high-end products, processes, or hardware products. After sandblasting, the surface is white and free of any impurities, eliminating cleaning troubles.

• Ceramics:

Aluminum oxide powder, like brown alumina, can be divided into calcined alumina and ordinary industrial alumina when used as ceramics. Calcined alumina is an essential raw material for producing antique bricks, while industrial alumina can be used for producing microcrystalline stones. In traditional glazes, alumina is often used as a whitening raw material. Due to the popularity of antique bricks and microcrystalline stones in the market, the usage of alumina has also been increasing year by year.

• Media:

Aluminum oxide powder is commonly used as a medium for color layer analysis.

• Manufacturing reinforced glass

Aluminum oxide is a major factor that makes metal aluminum less susceptible to corrosion in the air. Pure metal aluminum easily reacts with oxygen in the air, forming a thin layer of aluminum oxide film covering the surface of aluminum exposed to the air.

• α Usage of type aluminum oxide powder

α Type alumina is insoluble in water and acids, and α In the crystal lattice of type I aluminum oxide powder, oxygen ions are closely packed in six directions. Al3+is symmetrically distributed in the octahedral coordination center surrounded by oxygen ions. The lattice energy is very large, so the melting point and boiling point are very high α Type alumina is insoluble in water and acid, also known as aluminum oxide in industry, so it is also the basic material for manufacturing metal aluminum; It is also used for making various refractory bricks, refractory crucibles, refractory pipes, and high-temperature resistant experimental instruments; It can also be used as abrasives, flame retardants, fillers, etc; High-purity α Type alumina is still the raw material for producing artificial corundum, artificial ruby, and sapphire; It is also used for the production of modern large-scale integrated circuit boards

• γ Usage of type aluminum oxide powder

γ Type A aluminum oxide is prepared by dehydration of aluminum hydroxide at a low temperature of 140-150 ℃. It is also called Activated alumina and aluminum glue in industry. The oxygen ions in its structure are approximately tightly packed with cubic centers, and Al3+is irregularly distributed in octahedral and tetrahedral voids surrounded by oxygen ions. γ Type alumina is insoluble in water and can dissolve in strong acid or alkaline solutions. When heated to 1200 ℃, it is completely converted into α Type alumina γ Type alumina is a porous material with an internal surface area of hundreds of square meters per gram, high activity, and strong adsorption capacity. Industrial products are often colorless or slightly pink cylindrical particles with good pressure resistance

In addition, adsorbents, catalysts, and catalyst carriers are commonly used in petroleum refining and petrochemical industry; In industry, it is a deacidifying agent for transformer oil and turbine oil, and also used for chromatographic analysis; In the laboratory, it is a neutral and strong desiccant with a drying ability no less than phosphorus pentoxide. After use, it can be regenerated and reused after heating below 175 ℃ for 6-8 hours.

• β Usage of type aluminum oxide powder

β Type A aluminum oxide powder can also be called active aluminum oxide powder. Active aluminum oxide powder has high mechanical strength, strong hygroscopicity, no swelling or cracking after absorbing water, and remains in its original state. It is non-toxic, odorless, insoluble in water and ethanol, and has strong adsorption capacity for fluorine. It is mainly used for defluoridation of drinking water in high fluorine areas.

Activated alumina has selective adsorption ability for gas, steam and some liquid moisture. After adsorption saturation, it can be heated at about 175-315 ℃ to remove water and revive. Adsorption and reactivation can be carried out multiple times. In addition to being used as a desiccant, it can also adsorb lubricating oil vapor from contaminated oxygen, hydrogen, carbon dioxide, natural gas, etc. It can also be used as a catalyst and catalyst carrier, as well as a chromatographic analysis carrier.

• Abrasive alumina

Aluminum oxide is suitable for various dry and wet treatment processes, and can finely polish the rough surface of any workpiece, making it one of the most cost-effective abrasives. This sharp and diamond shaped synthetic abrasive has a hardness second only to diamond, making it particularly suitable for use when there are strict requirements for iron pollution. In addition, other uses of aluminum oxide powder are similar to that of white alumina.