Do you know about spherical alumina?

Spherical alumina is a new material, because of its unique shape and excellent performance, is widely used in aviation, automotive, electronics, construction and other fields. This paper will introduce the basic information, production process, performance characteristics, application fields and future development of spherical alumina.


Spherical alumina is a kind of multi-purpose material with the advantages of high strength, high wear resistance and low thermal conductivity. It is mainly used to manufacture various parts and structural parts, such as bearings, gears, seals, grinding wheels and so on. Spherical alumina is not only widely used in traditional industrial fields, but also has broad development prospects in emerging fields such as new energy, energy conservation and environmental protection.

Production process

The production process of spherical alumina mainly includes the following steps:

1. Selection and pretreatment of bauxite: Select high-grade bauxite for crushing, grinding and other pretreatment.

2. Synthesis of alumina: Reaction of bauxite with alkaline solution to synthesize alumina hydroxide.

3. Particle size control of aluminum hydroxide: By controlling the synthesis conditions, aluminum hydroxide particles with different particle sizes are obtained.

4. Drying of aluminum hydroxide: the aluminum hydroxide is dried to remove the moisture.

5. Firing of alumina balls: the dried aluminum hydroxide balls are sintered at high temperature to obtain alumina balls.

6. Particle size control of alumina balls: Through grinding and screening, alumina balls of different particle sizes are obtained.

Performance Characteristics

Spherical alumina has the following properties:

1. High strength: spherical alumina has high tensile strength and yield strength, and can withstand large loads.

2. High wear resistance: spherical alumina has excellent wear resistance, which can ensure the long life of parts.

3. Low thermal conductivity: The thermal conductivity of spherical alumina is low, which can effectively reduce the speed of heat transfer, and is suitable for occasions where heat preservation is required.

Application field

Spherical alumina has a wide range of applications, including:

1. Aerospace: Spherical alumina can be used to manufacture aircraft engine parts, aviation bearings, etc.

2. Automotive industry: spherical alumina can be used to manufacture automobile engine parts, brake pads, etc.

3. Electronics industry: spherical alumina can be used to manufacture electronic components, circuit boards, etc.

4. Construction industry: spherical alumina can be used to manufacture building structural parts, grinding wheels, etc.

Future development

With the continuous development of science and technology, the application field of spherical alumina will continue to expand. In the future, the development of spherical alumina will mainly focus on the following aspects:

1. Refinement: By improving the production process and technology, the production of smaller particle size, higher purity spherical alumina to meet the needs of high-end fields.

2. Functionalization: By adding other elements or using special surface treatment technology, spherical alumina is endowed with more functions, such as conduction and magnetism.

3. Environmental protection: The use of more environmentally friendly production processes and technologies to reduce the production cost of spherical alumina and environmental pollution.

In short, spherical alumina, as a new material, has a wide range of application prospects and important strategic significance. With the continuous development of science and technology, the performance and application fields of spherical alumina will continue to expand, and make more important contributions to the development of mankind.

Post time: Aug-17-2023