Calcined alumina micro powder SAL15M

Preparation and application of calcined alumina micro powder SAL15M

1. Introduction

Calcined alumina micro powder is a high-performance material widely used in ceramics, refractory materials, electronic components, catalysts, and other fields. SAL15M, as a specific calcined alumina micro powder, occupies an important position in industrial production due to its excellent physical and chemical properties. This article will provide a detailed introduction to the preparation process, performance characteristics, and applications of SAL15M in different fields.

2. Preparation process of SAL15M

The preparation process of calcined alumina micro powder SAL15M mainly includes steps such as raw material selection, calcination treatment, crushing and grading.

2.1 Raw material selection

The main raw materials for preparing SAL15M are aluminum hydroxide (Al (OH) ∝) or bauxite. These raw materials are pre treated, such as washing, drying, etc., to remove impurities and ensure the purity of the raw materials.

2.2 Calcination treatment

Calcination is a crucial step in the preparation of SAL15M. The pre treated raw materials are calcined at high temperatures, typically ranging from 1200 ° C to 1500 ° C. During the calcination process, aluminum hydroxide decomposes into aluminum oxide (Al ₂ O3) and undergoes a crystal transformation, forming α - Al ₂ O3. The calcination temperature and time have a significant impact on the crystal structure, particle size, and specific surface area of the final product.

2.3 Crushing and Grading

After calcination, the alumina block is crushed and classified to obtain micro powder. The crushing methods include ball milling, air flow crushing, etc., while classification is achieved through screening or air flow classification to obtain the desired particle size distribution. The typical particle size range of SAL15M is 1-15 microns.

3. Performance characteristics of SAL15M

SAL15M has the following excellent physical and chemical properties:

3.1 High purity

The alumina content of SAL15M is usually higher than 99.5%, with extremely low impurity content, ensuring its stability and reliability in high-end applications.

3.2 High hardness and wear resistance

Alpha Al ₂ O3 has high hardness and wear resistance, making SAL15M excellent in abrasive, polishing materials and other fields.

3.3 High thermal stability

SAL15M can maintain its structure and performance at high temperatures, making it suitable for refractory materials and catalyst carriers in high-temperature environments.

3.4 Good chemical inertness

SAL15M has high stability towards chemicals such as acids and bases, making it widely used in the chemical industry.

4. Application areas of SAL15M

4.1 Ceramic Materials

SAL15M, as a ceramic raw material, can improve the hardness, wear resistance, and thermal stability of ceramic products. It has wide applications in fields such as electronic ceramics and structural ceramics.

4.2 Refractory Materials

The high thermal stability and chemical inertness of SAL15M make it an ideal choice for high-quality refractory materials, such as high-temperature furnace linings and refractory bricks.

4.3 Electronic Components

In electronic component manufacturing, SAL15M is used as an insulation material and substrate material to improve the heat resistance and electrical insulation performance of the components.

4.4 Catalyst Carrier

The high specific surface area and chemical stability of SAL15M make it an excellent catalyst carrier, widely used in fields such as petrochemicals and environmental protection.

4.5 Abrasives and Polishing Materials

The high hardness and wear resistance of SAL15M make it important for applications in abrasives and polishing materials, such as surface treatment of metals, glass, and other materials.

5. Conclusion

Calcined alumina micro powder SAL15M plays an important role in multiple industrial fields due to its high purity, high hardness, high thermal stability, and good chemical inertness. By optimizing the preparation process, the performance of SAL15M can be further improved and its application range can be expanded. With the advancement of technology and the growth of industrial demand, the application prospects of SAL15M will be even broader in the future.