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The significant chemical composition of white fused alumina for coated abrasives is α-alumina (α-Al2O3). White fused alumina is made by electric arc furnace smelting under high temperature with the raw materials of industrial alumina powder. It is characterized by high hardness, purity, and abrasion resistance. The white fused alumina P grain has a more aggregative distribution than the F grain, with sharpness and evenly distributive features, bringing more efficiency for surface treatment. White fused alumina P grain is widely used in coated abrasive such as abrasive cloth, abrasive paper, abrasive belts, etc.
Introduce white fused alumina for coated abrasives P grain P240~P800:
White fused alumina sand is refined and crystallized by electric melting. The crystals are white in colour, uniform in various mesh sizes, uniform in particle shape, and are called angular crystals. They have sharp edges, high grinding powder, high purity, and self-defence: good sharpness, acid and alkali corrosion resistance, high-temperature resistance, and stable thermal performance. Mainly used for high-performance materials such as abrasive tools, grinding and polishing materials, advanced refractory materials, etc., Whitefused alumina sand is the most economical and affordable abrasive suitable for dry and wet production processes. It is especially ideal for the treatment of the rougher surface of the workpiece, and the surface after treatment requires a more delicate surface.
Chemical composite and of white fused alumina for coated abrasives P grain P240~P800:
| Al2O3 | Na2O | Fe2O3% | SiO2 |
| ≥99 | ≤0.4 | ≤0.1 | ≤0.02 |
Physical properties of white fused alumina for coated abrasives P grain P240~P800:
| Hardness: | Mohs:9.0 |
| Maximum service temperature: | 1900 Degree |
| Melting Point: | 2250 Degree |
| Specific Gravity: | 3.95g/cm3 |
| Volume density | 3.6g/cm3 |
| Bulk density(LPD): | 1.55-1.95 g/cm3 |
| Color: | White |
| Particle shape: | Angular |
Particle size distribution of white fused alumina for coated abrasives P grain P240~P800:
| Size | D0(μm)≤ | D3(μm)≤ | D50(μm) | D95(μm)≥ |
| P240 | 110 | 81.7 | 58.5±2 | 44.5 |
| P280 | 101 | 74 | 52.2±2 | 39.2 |
| P320 | 94 | 66.8 | 46.2±1.5 | 34.2 |
| P360 | 87 | 60.3 | 40.5±1.5 | 29.6 |
| P400 | 81 | 53.9 | 35±1.5 | 25.2 |
| P500 | 77 | 48.3 | 30.2±1.5 | 21.5 |
| P600 | 72 | 43 | 25.8±1 | 18 |
| P800 | 67 | 38.1 | 21.8±1 | 15.1 |
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