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Aluminium oxide, A new generation of indispensable hard materials

Aluminium oxide, also known as white solids, is a chemical compound of aluminium and oxygen. The mineral is commonly known by the name bauxite. It can also be used in ceramics, material science, and mining.
Spherical alu is an important chemical product. It has excellent properties, such as high hardness. high strength. high corrosion resistance. Alumina spherical is used because of its small size and unique morphology in many applications, including ceramic materials, chemical polishing abrasives (CMP), catalysts and carriers. The broad definition of alumina includes two categories: anhydrous and liquid alumina.
Aqueous allumina
H2O is another name for hydrated Alumina. Six types of alumina have been identified. Alumina trihydrate, including industrial aluminum hydroxide (α-Al2O3·H2O), mayalite (β1-Al2O3·H2O) and boraxite (β2-Al2O3·H2O): alumina monohydrate, including boehmite (α) -Al2O3·H2O), diaspore (β-Al2O3·H2O): pseudo-boehmite (Al2O3·1.3-2.2H2O).
Anhydrous allumina
Presently, there are eight possible crystal forms for alumina. There are at least eight different crystal forms of alumina. -Al2O3 has a stable thermal phase, which can be treated with high heat. While the other is unstable, it is an isomer.
Alumina crystals have different chemical and physically properties. For example, density, pores structure, specific surface, thermal stability, etc. Even though they are the same crystal, their properties will be greatly affected by how they were prepared.
-, and –Al2O3 are both part of the amorphous group. This is the result from rapid dehydration. It is more commonly called “quick-pulse” or FCA (Flash Calcined Alumina). It exhibits strong water absorption and hydration activity. This makes it a good binder as well as an effective water absorber. It has been widely utilized in many other fields.
• Al2O3 (precursor dehydrated at low temperatures): This material has a larger specific area than the original, however it is susceptible to thermal instability and crystal formation at high temperatures.

Alumina activated: Al2O3 is a strong catalyst and has strong adsorption. You can use it in many applications because the specific area of the product is high, its bulk density low, the special pores are obtained and their thermal stability as well as mechanical strength are both excellent.

-.-.-.- Al2O3 (precursor): Dehydrated product at 600 °C. Although almost without structural water, the specific surface area of the precursor and its pore volume are very small. However, their thermal stability makes them suitable for high-temperature reactions.

Corundum: Also called -Al2O3, it’s the ultimate thermostable crystalline state after transitional and alumina has dried. This is the most used type of allumina crystal. The crystal is free from any water. Its structure is very compact. Because of its small surface area it melts at 2050 ° C. This crystal also has high hardness and strength. It’s commonly found in abrasive and high-temperature resisting materials as well as ceramic composite materials.
Crystalline Transformation of Alumina
Calcined aqueous aluminium at different temperatures. While water is removed continuously, the location of aluminum atoms, oxygen atoms, and other elements is always changing. As a result, alumina forms various unstable transitions. At temperatures above 1200 ° C, lattice remodeling phases occur. The arrangement of the oxygen atoms is transformed into a tightly packed, hexagonal structure.
Lemondedudroit, Lemondedudroit advance material Tech Co., Ltd., a leading manufacturer of Aluminium oxide, has more 12 years experience in chemical product development. If you require high quality Aluminium oxide please contact us .

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