25A 24A 23A White fused alumina
25A 24A 23A are common code in Russia.
White fused alumina is made with an electric furnace from high-grade alumina powder as raw material. The resulting mineral has higher hardness and slightly lower toughness than brown fused aluminum oxide. Characterized by its high purity, strong grinding ability, abrasive tools made of it are suitable for grinding and polishing of cutting tools, precision-castings, spraying and coasting, medium body for chemical industry applications, special ceramics and high-grade refractory materials. Detailed specifications can be supplied on request
Available size for 25A 24A 23A:
8-5mm, 5-3mm, 3-1mm, 0-1mm
320mesh-0, 280mesh-0, 240mesh-0, 200mesh-0, 180mesh-0
F8, F10, F12, F14, F16, F20, F22, F24, F30, F36, F40, F46, F54,
F60, F70, F80, F90, F100, F120, F150, F180, F220, F240, F280, F320
F360, F400, F500, F600, F800, F1000, F1200
The physical and chemical analysis for 25A 24A 23A:
| Physical properties | Chemical compositions | Content (%) | |
| Crystal body | Hexagonal | Al2O3 | ≥99.2 |
| Main crystal body | Al2O3 | ||
| Color | white | Na2O | ≤0.4 |
| True density | ≥3.9 g/cm3 | ||
| Bulk density | 1.75-1.95 g/cm3 | SiO2 | ≤0.1 |
| Mons’ hardness | 9 | ||
| Linear expansion coefficient | 8.3×10-4 |
Fe2O3 |
≤0.1 |
| Loss on ignition | ≤0.06% | ||
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