Spherical Alumina - BAK
First established in 2007, with headquarter in the Ya’ an Economic Development Zone of Sichuan, Bestry is a world leader specialized in the research and development, production and sales of functional powder materials .
Through independent research and development of technical process, as well as manufacturing of key production equipment, Bestry has successfully built a complete portfolio of products with high performance and stable quality.
The company’ s core products include thermal conductive powder materials, such as spherical alumina, near-spherical alumina, aluminum nitride powder spherical aluminum nitride, flake boron nitride, electro-magnetic shielding powder materials, nickel-coated graphite, silver-coated nickel, boehmite, lithium battery membrane coating, and pole plate coating.
Spherical Alumina - BAK series
Product Features
- High Loadability: High degree of sphericity, controllable particle size distribution, high filler loading for silicone and epoxy resin, to get the mixture with low viscosity and high flowability;
- High Thermal Conductivity: Because of its almost perfect spherical structure, the filler used in the raw materials can achieve multi-directional heat transmission. The whole mixture system is well dispersed, providing final products with excellent thermal conductivity and physical property;
- Low Abrasion: Compared with irregular powder, the application of spherical filler can reduce the abrasion of the mixer, molding machines and other equipments, and prolong working life of the equipment.
Applications
- Thermal Interface Materials: thermal silica gasket, thermal grease , phase change materials;
- Thermal Engineering Plastics: LED lamp cover, switch enclosures, electronic products shell, heat dissipators for electronics;
- Al-based Copper Clad Laminate:high-power LED circuit substrate, power circuit boards, etc;
- Alumina Ceramic Filters；
- Thermal Spray Coating
Specifications
| Properties | Unit | BAK Series Product Code | |||||||||||
| BAK-1 | BAK-2 | BAK-5 | BAK-10 | BAK-15 | BAK-20 | BAK-30 | BAK-40 | BAK-70 | BAK-90 | BAK-120 | |||
| Particle Size | (D10) | μm | 0.58 | 0.69 | 2.54 | 4.18 | 7.03 | 10.5 | 16.88 | 23.77 | 44.32 | 55.23 | 90.95 |
| (D50) | μm | 1.03 | 2.18 | 5.52 | 10.03 | 15.11 | 20.8 | 30.52 | 41.54 | 71.54 | 87.96 | 122.39 | |
| (D90) | μm | 2.14 | 5.24 | 9.09 | 18.46 | 24.06 | 37.24 | 48.87 | 66.44 | 106.5 | 134.92 | 172.72 | |
| Specific Surface Area |
m2/g |
1.69 | 1.27 | 0.36 | 0.17 | 0.14 | 0.11 | 0.1 | 0.07 | 0.05 | 0.06 | 0.06 | |
| E.C. | μS/cm | 6.07 | 5.4 | 5.65 | 4.05 | 1.83 | 6.87 | 7.95 | 4.65 | 6.18 | 8.15 | 2.6 | |
| pH Value | - | 7.53 | 7.79 | 7.7 | 7.41 | 7.37 | 7.62 | 7.39 | 7.31 | 7.42 | 7.3 | 7.44 | |
| Moisture | % | 0.05 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.03 | 0.05 | 0.03 | 0.03 | |
| True Density |
g/cm3 |
3.71 | 3.71 | 3.74 | 3.76 | 3.86 | 3.79 | 3.75 | 3.81 | 3.87 | 3.88 | 3.81 | |
| Spheroidization Rate | % | 96 | 98 | 98 | 98 | 96 | 96 | 98 | 96 | 96 | 95 | 96 | |
| Chemical Composition |
AI2O3 |
% | 99.93 | 99.94 | 99.93 | 99.94 | 99.93 | 99.94 | 99.94 | 99.94 | 99.94 | 99.94 | 99.94 |
|
SiO2 |
ppm | 445 | 373 | 424 | 358 | 430 | 352 | 333 | 349 | 342 | 330 | 359 | |
|
Fe2O3 |
ppm | 152 | 120 | 176 | 136 | 158 | 144 | 161 | 148 | 158 | 164 | 133 | |
|
Na2O |
ppm | 103 | 107 | 100 | 106 | 112 | 104 | 106 | 103 | 100 | 106 | 108 | |
