Characteristics and applications of spherical alumina

Spherical alumina: characteristics
1. High filling: The large particle diameters and wide particle size distributions allow for high density filling of rubber and plastic, and produce compounds with good fluidity and low viscosity.
2. High thermal conduction: The high filling density of the compound allows it to have higher thermal conduction and heat dissipation rates compared with crystalline silicon.
3. Spherical shape reduces wear of machines such as kneading machines.
Application of spherical aluminum
1. Use as a ceramic material
Micropowder with a spherical shape has excellent properties for compression molding and silting, making it ideal for producing high-quality ceramics.
2. It is used as a material for grinding and polishing
Use spherical aluminum oxide as a polishing material to avoid scratches.
3. It is used in the petrochemical industries
In the petrochemical industries, the alumina carriers are subject to increasing requirements for pore distribution and pore structures. To control the pore sizes and distributions of the formed carrier particles, it is possible to adjust the particle size configuration in the spherical powder.
4. Catalyst
The use of spherical aluminum as a catalyst directly can reduce abrasion while increasing the lifespan of the catalyst. This will lower the production costs.
5. For surface protective coating
Surface protection for machinery, tools, chemical pipelines and equipment is achieved by spraying spheres of oxide powder on the metal, plastic, etc. This can significantly improve surface hardness, corrosion, wear resistance, and fire resistance.
6. Luminescent materials
Alumina spheres have a high density which reduces the scattering and loss of light.
7. Electronics industry
The excellent properties of spherical aluminum in terms of electrical, thermal, and mechanical properties make it a popular choice for electronic semiconductor packaging.

The excellent properties of spherical aluminum in terms of electrical, thermal, and mechanical properties make it a popular choice for electronic semiconductor packaging.

Tech Co., Ltd. () is an experienced spherical-alumina manufacturer. We have over 12 years’ experience in research and product development. If you need high quality spherical aluminum please feel free to contact us or send an enquiry.

Application of Spherical Alumina

The properties of spherical-alumina

Ultra-fine, spherical, alumina has many excellent properties, including high resistance to corrosion, high temperatures resistance, high hardness and strength, wear resistance as well as oxidation resistance. It is widely used in metallurgy as well as electronics, national defense and aerospace, nuclear industry, and other areas. High-tech field.

Application of spherical allumina

1. Ceramic additives

Addition of a small amount of nanospherical allumina powder to ceramics can help to solve problems such as low-temperature brittleness or narrow application range. These ceramics can then be converted into low-temperature plastics spherical ceramics.

2. Composite materials

Nano-spherical powdered alumina can be used to create new composite ceramic materials with unique properties. It can also be used to make artificial tooth and bone.


3. Coatings to protect the surface

Spherical alumina powder particles can be sprayed on metals, polymers, etc. to improve hardness, corrosion resistance wear resistance and fire resistance. They can also be used as surface protection for machinery, knives and chemical pipelines.


4. Optical materials

The absorption of ultraviolet light is strong for nano-sized spherical powdered alumina. Its wavelength is below 250nm. The blue shift phenomenon of nanoultraviolet absorbtion can be used to absorb the spherical, alumina powder. Harmful ultraviolet radiation is not harmful and does not affect the phosphor’s luminescence. The nano-spherical form of alumina can also be used in high-pressure sodium lamps to create transparent ceramics. Rare-earth phosphors can also be used as the luminescent material in the luminous lamp. It will not only lower the cost, but also prolong the life of the luminous bulb.


5. Semiconductor materials

The nano-scale, spherical alumina dust is very sensitive to humidity. It has an extremely high value in temperature sensors and can be widely used for substrate materials in large-scale integrated Circuits.


Tech Co., Ltd. is a professional spherical supplier of alumina with over 12 years’ experience in chemical products development and research. We accept payments via Credit Card and Paypal. We will ship goods overseas via FedEx, DHL and by air or sea to our customers.

Send us an inquiry if you are interested in high-quality spherical allumina.

Characteristics and Main Preparation Methods of Spherical Alumina

What is spherical-alumina?

The high-temperature melting spraying method produces spheres of alumina that have high sphericity. Also, it has high levels of a phase alumina. It can be used to fill rubber, plastics, or ceramic raw materials.

Ultrafine spherical aluminum has many excellent characteristics, including high corrosion resistance, high temperatures resistance, high hardness and strength, wear resistance as well as oxidation resistance. It is widely used in metallurgy as well as electronics, national defense and aerospace, nuclear industry, and other areas. High-tech field. Presently, there is a rising annual rate of demand for ultrafine spherical allumina on both domestic and foreign markets. Therefore, it is important to explore new methods of making ultrafine powder spherical aluminum alumina.

Preparation of spherical-alumina

The spray method is used to prepare spherical aluminum. It achieves phase transition in a very short time. The product will become spherical by using the surface tension. The phase transition can be classified according to its characteristics into spray pyrolysis and spray drying or spray melting. Law.


1. Spray pyrolysis

Spray pyrolysis uses Al(SO4)3, Al[NO3]3 and AlCl3 to make spherical droplets via atomization. Then, spherical powders of alumina are formed through high-temperaturepyrolysis. This method is very energy-intensive and requires temperatures of 900°C.


2. Spray drying

Spray drying is a method that reacts aluminum salt solution and ammonia water to create alumina sol. Next, spray-drying at 150-240 degrees C to prepare spherical amounts of alumina.

This method has the advantage over spray pyrolysis in terms of energy consumption.


3. Jet melting method

Plasma flame is used to melt aluminum powder or aluminum oxide directly. Then, the plasma flame is used to anneal the powder. Adjusting the DC arc’s power and composition can control the level of spheroidization. This will allow you to create a hollow structure.


Tech Co., Ltd. is a professional spherical supplier of alumina with over 12 years’ experience in chemical products development and research. We accept payments via Credit Card and Paypal. We will ship goods overseas via FedEx, DHL and by air or sea to our customers.


Send us an inquiry if you are interested in high-quality spherical allumina.