Calcined Alumina -AMANDA INTERNATIONAL PRIVATE LIMITED

Introduce

Alumina powder is a high-purity, fine-grained material made from alumina oxide (Al2O3) that is widely used in a variety of industrial applications. It is a white crystalline powder that is typically produced through the refining of bauxite ore.
Alumina powder has a range of desirable properties, including high hardness, chemical resistance, and electrical insulation, which make it a valuable material in many industries.
It is commonly used as a raw material for the production of Ceramics,refractorier and abrasives,as well as for the manufacturing of various electronic components, such as insulators, substrates, and semiconductor components.

Key words

Calcined Alumina , 

Calcined Alumina Al2O3 Supplier,

Alumina Oxide Powder,

Alumina Oxide, 

Ceramic raw materials ,

1.Characteristics of Calcined Alumina

1. Crystal form transformation: At high temperatures, the internal crystal form structure of calcined alumina powder will change, transforming from multiple crystal forms to the α-Al₂O₃ phase. This crystal form transformation not only improves the stability of aluminium oxide powder, but also enhances its chemical properties.

2. Physical form and structural changes: Under the effect of high temperature, calcined alumina particles will undergo expansion and coalescence processes, thereby presenting different pore structures and capillary structures. This structural change not only affects the particle size and shape of aluminium oxide powder, but also has a profound impact on its physical properties such as specific surface area and porosity.

3. Chemical stability and activity: High-temperature calcination has a significant impact on the chemical stability and activity of alumina powder. However, the influence of high-temperature calcination on alumina powder is not entirely positive. As the temperature rises, the volume of alumina powder will gradually shrink and the cracks will increase, which may lead to a decrease in its mechanical strength and wear resistance.

4. Particle size variation: With the increase of calcination temperature, the average particle size of alumina particles generally shows a trend of first increasing and then decreasing. This change is closely related to the phase transformation of the alumina precursor during the calcination process. During the process of crystal structure transformation, alumina particles undergo shrinkage polymerization, resulting in a reduction in particle size.

5. Impurity removal: High-temperature calcination can also remove impurities in alumina powder to a certain extent, thereby improving its purity

   
   

2.Calcined Alumina Benefits

1. Good thermal stability: Calcined alumina can remain stable in high-temperature environments and is not prone to deformation or decomposition.

2. High whiteness and purity: This makes calcined alumina widely used in the fields of optics and electronics.

3. Simple processing and uniform particle size: These features make calcined alumina easy to mix with other materials, while also ensuring the quality and consistency of the products.

4. Low impurity content: During the calcination process, most impurities will be removed, which helps to improve the performance and reliability of the final product.

5. Strong high-temperature resistance: Alumina 1 can be used in oxidizing and reducing atmospheres up to 650°C(2900°F) and vacuum environments up to 2000°C(3600°F).

6. Wear resistance: Alumina is a very hard ceramic with excellent wear resistance.

7. Electrical insulator: Alumina is typically used as a high-temperature electrical insulator, especially for higher purity grades that offer better resistivity.

8. Chemical resistance: Alumina has good resistance to strong acids and strong alkalis at high temperatures.
   

Contact Details

As a leading manufacturer, AMANDA INTERNATIONAL PRIVATE LIMITED has been deeply engaged in the field of calcined alumina for many years. We are renowned for our quality and reliability, and play a key role in shaping industries that rely on the outstanding performance of calcined alumina.

Sales Manager:Alsa Song

Whatsapp:+86-15842046996

Email:sales08@amanda.net.cn