Fused Aluminun Oxide is generally produced by high quality bauxites together with hard coal through the fusion in electric arc furnaces subject to temperature in excess of 2000°C. Fused aluminum oxide, a chemically stable compound is resistant to most acid as well as against chemical effects caused by gases, metallic also at high temperatures. Fused aluminum oxide is a tough, hard material with high strength, excellent wear and corrosion resistance and good thermal conductivity.
Chemical compositions
- Al2O3 92.0 – 99.6 %
- SiO2 < 1.5 %
- Na2O < 2.0 %
- Fe2O3 < 3.0 %
Physical properties
| Color | : brown, white, pink |
| Crystal shape | : sharply, blocky |
| Smell | : none |
| Hardness | : Moh’s scale 9 |
| specific gravity | :3.9 |
Application
- grinding
- lapping
- polishing
- refractory
- blasting
Production specification
- Marco grits: #16 - # 220
- Micro grits: #240 - #6000
Packing: 20 kgs / bag or 25 kgs / bag
High purity and low sodium White Fused Alumina
Specification:
High purity and low sodium white fused alumina is a high purityα-type alumina powder containing no less than 99.75% Al2O3. This product is developed to maintain a low Na2O amount, as low as 0.05% or less, so it has an excellent insulation capability. It can be used as insulation coating material for a heater of electronics tubes and various insulating film materials. High purity low sodium WA can also be used as high-quality ceramics material or high-quality filler material.
| Type | F240 | F280 | F320 | F360 | F400 | F500 | F600 | F800 | F1000 | F1200 | F1500 | |
| Chemical composition |
Al2O3 （％） |
99.8 | 99.8 | 99.8 | 99.8 | 99.75 | 99.7 | 99.7 | 99.7 | 99.7 | 99.7 | 99.7 |
| Na2O （％） |
0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | |
| Fe2O3 （％） |
0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | |
| SiO2 （％） |
0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.05 | 0.05 | 0.05 | 0.05 | |
| Particle size |
D50 (μm) |
44.5 ± 2.0 |
36.5 ± 1.5 |
29.2 ± 1.5 |
22.8 ± 1.5 |
17.3 ± 1.0 |
12.8 ± 1.0 |
9.3 ± 1.0 |
6.5 ± 1.0 |
4.5 ± 0.8 |
3.0 ± 0.5 |
2.0 ± 0.4 |
Application:
It is used for making electronics, ceramic insulation components ,insulator coating,and engineering ceramics as well as wear resisting floor paper.
It is the essential material for making ceramic filler, insulator coating,thermally conductive interface materials, Gap Pad electrically insulating and non-insulating gap fillers, thermally conductive adhesive tapes, and Thermal Clad insulated metal substrates for conducting heat.
Thermal spray material
It is widely used in high standard finishing, grinding and polishing industries
SPHERICAL ALUMINA(WAS)
Outline
Spherical Alumina is high sphericity alumina, developed by JINJIYUAN’s unique high tempreture melting technologies.
Spherical alumina can provide high thermal conductivity and improvement of the surface hardness of the various resines or rubbers by filling them.
Low ionic impurity type is also available. This can be used in the electronic materials field where reliability is required(particle diameter: D50: 3-70μm micrometer)
Characteristics
Easily filled with high content to various types of resins/rubbers, and can also control wear in kneading machines or molds compared with irregular-shaped fillers.
Theparticle distribution can be adjusted according to use.
Applications
- Filler for thermal interface material
- Filler for semiconductor sealants
- Powder to be laid for ceramic baking
- Abrasive grain
- Spraying material