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Alumina Oxide-starting A New Journey for the Ceramic Industry

Posted on 2023-03-09 By admin

What is alumina dioxide?

Alumina oxide, a novel type of high purity material, plays an increasing role. Alumina oxide, a fine white powder that has uniform particle sizes, is easy to disperse and stable chemical properties. This is the raw material used for producing heat-resistant or wear-resistant products. There are many uses for alumina oxide. They can be used in light-transmitting sintered bodies as well as the carriers for the phosphor.

What are the characteristics of alumina dioxide?

Alumina oxide can be described as an al2O3 stable aluminum oxide. This is what it’s also called in materials science, mining and pottery. The shape of the amphoteric oxide is a white solid. It can be hardy in water and has a tasteless, odorless, hard texture. Amphoteric dioxide, which is insoluble in alkaline solution and inorganic acid, is almost insoluble when mixed with non-polar organic and water solvents. Its relative density (d204), of 4 is very low, while its melting point is 2050.

It is an amphoteric material, meaning it reacts with acids and bases, such as alkalis and acid, can act as bases with other bases, neutralize chemical reactions, and so on.

Alumina oxide can also be made in other forms

There are two types of Alumina Oxide: calcined or ordinary industrial alumina. For making antique bricks, calcined and industrial alumina are essential ingredients. However, microcrystalline rock can also be made from industrial alumina.

Corundum is the natural, most common crystalline form alumina. Because of their distinctive colors, sapphire and ruby are examples of corundum that exhibit gem quality. A unique shade of deep red, Ruby has trace chromium laser quality. The impurities iron and titanium can change the color of sapphire.

The application range for alumina oxide

While Alumina is an electric insulator, for ceramic materials this substance is also insoluble in liquid water. Corundum, or Alumina Oxide is the most popular crystalline form of Alumina. Its hardness allows it to be made into an abrasive component and a cutting tool component.


Aluminum’s weather resistance is due to Alumina Oxide. The atmosphere is extremely reactive to aluminum metal. Aluminum oxide passesivation (thickness of 4 nm), is formed when aluminum surfaces are exposed. This layer protects the metal against further oxidation. Through anodization, the thickness and properties of the oxide layers can be enhanced by using alumina materials. Anodization is a process that allows alloys such as aluminum bronze to improve corrosion resistance. The anodized aluminum is usually amorphous, however, plasma electrolytic or other oxidation processes will produce large quantities of crystalline alumina within the coating. This increases its hardness.


The ceramic industry is the origin of alumina ceramics. Alumina ceramics consist of ceramic material with Al2O3 being the primary raw material and corundum the main crystal phase. Alumina ceramics can be used for their raw materials because it has high mechanical strength and high hardness. It also exhibits low high frequency dielectric losses, good chemical resistance, and high thermal conductivity.


Luoyang Tech Co., Ltd. is an aluminum oxide producer with more than 12 years’ experience in chemical product research and development. Send an inquiry if you’re looking for premium aluminumoxid.

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