Characteristics and applications of spherical alumina

Characteristics of spherical alumina

1. High packing density: With large particle size and wide particle size distribution, it can realize high-density packing of rubber and plastic, and produce compounds with low viscosity and good fluidity.

2. High thermal conductivity: Compared with crystalline silica, high packing density can make the thermal conductivity and heat dissipation rate of the compound higher.

3. Low wear resistance: due to its spherical shape, the kneader, molding machine and mold wear less.

Spherical alumina Al2O3 powder overview

Alumina is an inorganic substance with the chemical formula Al2O3. It is a high-hardness compound and is also called bauxite in mining, ceramics and materials science. It is a white solid, insoluble in water, odorless, tasteless, and very hard in nature. Alumina is a typical amphoteric oxide (corundum is alpha-shaped and belongs to the hexagonal compound with the highest density. It is an inert compound that is slightly soluble in acid [1 ] Soluble in inorganic acids and alkaline solutions, almost insoluble in water and non-polar organic solvents; relative density (d204) 4.0; melting point 2050°C, boiling point 2980°C, ionized ionic crystals at high temperature, commonly used in the manufacture of refractory material.

Industrial alumina is prepared from bauxite (Al2O3·3H2O) and gibbsite. For Al2O3, which requires high purity, it is usually prepared by chemical methods. There are many kinds of Al2O3 crystals, and there are more than ten kinds of known crystals. α-Al2O3, β-Al2O3 and γ-Al2O33 crystal types are different in structure and performance. They are almost completely transformed into α-Al2O3 at high temperatures above 1300℃.

Spherical alumina Al2O3 powder features: high bulk density: large particle size, wide particle size distribution, can achieve high-density packing of rubber and plastic, produce low viscosity, good fluidity compounds; high thermal conductivity: and crystalline silica Compared with the high packing density, the thermal conductivity and heat dissipation rate of the composite material can be higher;

Low abrasiveness: Due to the spherical shape, the kneader, molding machine and mold wear less.

Alumina is used to fuse high-quality bauxite to produce brown corundum, while high-quality aluminate is used to produce powdered corundum and white corundum. Their natural crystal structure makes them hard and fast. Raw materials for bonding abrasives and coated abrasives. Alumina can be recycled multiple times, and the number of cycles depends on the grade of the material and the specific process. Most standard sandblasting equipment can be used.

Spherical alumina Al2O3 powder should be stored in a dry, cool and sealed environment, and should not be exposed to the air. In addition, avoid heavy pressure and transport it as a normal item. Packed in a double-layer plastic bag, it can be filled with argon in a vacuum, or it can be evacuated and filled with argon for protection. Vacuum packing 100G, 500G or 1KG/bag, 25kg/drum or according to your requirements.

Application of spherical alumina

1. Used as a ceramic material

Spherical powder has good compression molding and sintering characteristics, which is extremely beneficial to the production of high-quality ceramic products.

2. Used as grinding and polishing material

Using spherical alumina as a polishing abrasive can avoid scratches.

3. Application in petrochemical industry

In the petrochemical industry, higher and higher requirements have been placed on the pore size distribution and pore structure of the alumina support. The spherical alumina powder can be adjusted by adjusting the particle size configuration to control the pore size and distribution of the formed catalyst carrier particles.

4. Used in catalysts

Spherical alumina directly used as a catalyst can reduce attrition and increase the service life of the catalyst, thereby reducing production costs.

5. Used for surface protective coating will

Spherical oxide powder particles are sprayed on metals, plastics, etc., which can greatly improve the surface hardness, corrosion resistance, wear resistance and fire resistance, and are used for surface protection of machinery, tools and chemical products.

6. Used for luminescent materials

Spherical alumina powder has a high packing density, which can reduce the scattering of the luminous body, effectively reduce the loss of transmitted light, and thus increase the light transmittance.

7. Used in the electronics industry

Due to the excellent properties of spherical alumina in terms of electrical, thermal and mechanical properties, it is widely used in the field of semiconductor electronic packaging.

Due to the excellent properties of spherical alumina in terms of electrical, thermal and mechanical properties, it is widely used in the field of semiconductor electronic packaging.

Price of spherical alumina Al2O3 powder

The price of spherical alumina Al2O3 powder will vary randomly with production cost, transportation cost, international situation, exchange rate and market supply and demand of spherical alumina Al2O3 powder. Tanki New Materials Co., Ltd. aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for spherical alumina Al2O3 powder, please feel free to send an inquiry to get the latest price.

Suppliers of spherical alumina Al2O3 powder

As a global supplier of spherical alumina Al2O3 powder, Tanki New Materials Co. Ltd has extensive experience in advanced, engineered material performance, application and cost-effective manufacturing. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity targets, functional ceramics and structural devices, and provides OEM services.