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White Fused Alumina (WA)
White fused alumina is also called white aluminium oxide.
Description
White fused alumina (WA) is produced by bayer alumina in an electric arc furnace at high temperatures. The product shows higher hardness and lower toughness than that of brown aluminium oxide. The materials are used to grind high carbon steel, high speed steel and chilled steel. It can also be used as polishing materials and precision founding sand, spraying and coating materials, catalyst carrier, special ceramics and super refractory materials.
Model
| Grain Usages and Types | |||
| Usage | For vitrified wheels, organic wheels | For coated abrasives | For refractory materials |
| Type | WA | WA-P | WA-R |
| Physical Characteristics | |||||
| Item | Basic mineral | Crystal system | Crystal color | Mohs hardness | Density |
| White fused alumina | α- Al2O3 | Hexagonal | White | 9 | ≥3.90g/cm3 |
| Item | Micro hardness | Electrical resistivity | Grinding ability (compared with diamond as one) | Linear expansion coefficient (when 900℃ α•10-6k-1) | |
| White fused alumina | HV2200-2300 | 1014-1016Ω•cm | 0.12 | 8.3 | |
| Chemical Composition (GB/T 2479-2008) | |||
| Type | Grit | Chemical composition (%, by weight) | |
| Al2O3 | Na2O | ||
| WA | F4-F80 | ≥99.10 | ≤0.35 |
| F90-F150 | ≥99.10 | ≤0.40 | |
| F180-F220 | ≥98.60 | ≤0.50 | |
| F230-F800 | ≥98.30 | ≤0.60 | |
| F1000-F1200 | ≥98.10 | ≤0.70 | |
| WA-P | P12-P80 | ≥99.10 | ≤0.35 |
| P100-P150 | ≥99.10 | ≤0.40 | |
| P180-P220 | ≥98.60 | ≤0.50 | |
| P240-P800 | ≥98.30 | ≤0.60 | |
| P1000-P1200 | ≥98.10 | ≤0.70 | |
| P1500-P2500 | ≥97.50 | ≤0.90 | |
| WA-R | 0-1mm | ≥99.00 | ≤0.50 |
| 1-3mm | ≥99.00 | ≤0.50 | |
| 3-5mm | ≥99.00 | ≤0.50 | |
| 5-8mm | ≥99.00 | ≤0.50 | |
| Note: Special requirement on chemical composition can be satisfied through discussion. | |||
| Optional Particle Sizes | |
| Product Category | Particle Size |
| WA | F12-F220, F240-F1200, JIS240#-8000# etc. |
| WA-P | P12-P220, P240-P3000 etc. |
| WA-R | 0-1MM, 1-3MM, 3-5MM, 5-8MM, etc. |
| Note: Special specification can be customized according to customer's requirements. | |
