Among sandblasting materials, white corundum has become a leader in the industry with its unique physical and chemical properties. It is widely used in abrasives, molds, precision tool manufacturing and other fields with its high hardness, high wear resistance, good thermal stability and excellent processing performance.
| Typical Chemical composition | |
| AL2O3 | 99.3%min |
| SiO2 | 0.06% |
| Na2O | 0.3%max |
| Fe2O3 | 0.05%max |
| CaO | 0.04%max |
| MgO | 0.01%max |
| K2O | 0.02#max |
| Typical physical properties | |
| Hardness: | Mohs:9.0 |
| Maximum service temperature: | 1900 ℃ |
| Melting Point: | 2250 ℃ |
| Specific Gravity: | 3.95g/cm3 |
| Volume density | 3.6g/cm3 |
| Bulk density(LPD): | 1.75-1.95 g/cm3 |
| Color: | White |
| Particle shape: | Angular |
| Available size: | |
| F8# F10# F12# F14# F16# F20# F22# F24# F30# F36# F46# F54# F60# F70# F80# F90# F100# F120# F150# F180# F220# | |
1. Overview of white corundum
White corundum is a hard material with aluminum oxide as the main component, which has the characteristics of high hardness, high wear resistance and good chemical stability. Its color is usually white or grayish white, with a dense crystal structure and high tensile strength and compressive strength. The hardness of white corundum is second only to diamond and sapphire, and it has good cutting and polishing properties, so it has been widely used in industrial production.
2. Preparation process of white corundum
The preparation process of white corundum mainly includes the steps of raw material selection, smelting, crystallization and processing. First, high-purity aluminum oxide is selected as the raw material, which is finely processed and mixed, and then placed in a high-temperature arc furnace for smelting. During the smelting process, the aluminum oxide is melted and crystallized into white corundum by controlling the temperature and atmosphere. Finally, after crushing, grinding and other processing techniques, white corundum products of different particle sizes and shapes are obtained.
3. Application fields of white corundum
1. Abrasive field: White corundum has high hardness and wear resistance and is an important raw material for manufacturing abrasives. In the field of abrasives, white corundum is widely used to manufacture various grinding tools and grinding tools, such as grinding wheels, emery cloth, sandpaper, etc. Its excellent cutting and polishing performance makes the surface of the workpiece smoother and improves the quality and precision of the product.
2. Precision tool manufacturing: The high hardness and high strength of white corundum make it an ideal material for manufacturing precision tools. In the fields of mechanical manufacturing, electronic manufacturing, etc., white corundum is used to manufacture precision tools such as knives and grinding heads for processing high-hardness and high-precision parts.
3. Ceramic materials: White corundum can also be used as a raw material for ceramic materials, used to manufacture high-temperature ceramics, insulating ceramics and other products. Its good thermal stability and chemical stability make ceramic products have higher performance and life.
4. Other fields: In addition, white corundum can also be used in aerospace, military and other fields to manufacture high-strength, high-hardness parts and equipment.
SIZE DISTRIBUTION:
| Grit | 1 | 2 | 3 | 3 and 4 | 5 | Q5（≤） | ||||
| W1 (um) | Q1 | W2(um) | Q2（≤） | W3(um) | Q3（≥） | W4(um) | Q3+Q（≥） | W5(um) | ||
| F8 | 4000 | 0 | 2800 | 20% | 2360 | 45% | 2000 | 70% | 1700 | 3% |
| F10 | 3350 | 0 | 2360 | 20% | 2000 | 45% | 1700 | 70% | 1400 | 3% |
| F12 | 2800 | 0 | 2000 | 20% | 1700 | 45% | 1400 | 70% | 1180 | 3% |
| F14 | 2360 | 0 | 1700 | 20% | 1400 | 45% | 1180 | 70% | 1000 | 3% |
| F16 | 2000 | 0 | 1400 | 20% | 1180 | 45% | 1000 | 70% | 850 | 3% |
| F20 | 1700 | 0 | 1180 | 20% | 1000 | 45% | 850 | 65% | 710 | 3% |
| F24 | 1180 | 0 | 850 | 25% | 710 | 45% | 600 | 65% | 500 | 3% |
| F30 | 1000 | 0 | 710 | 25% | 600 | 45% | 500 | 65% | 425 | 3% |
| F36 | 850 | 0 | 600 | 25% | 500 | 45% | 425 | 65% | 355 | 3% |
| F40 | 710 | 0 | 500 | 30% | 425 | 40% | 355 | 65% | 300 | 3% |
| F46 | 600 | 0 | 425 | 30% | 355 | 40% | 300 | 65% | 250 | 3% |
| F54 | 500 | 0 | 355 | 30% | 300 | 40% | 250 | 65% | 212 | 3% |
| F60 | 425 | 0 | 300 | 30% | 250 | 40% | 212 | 65% | 180 | 3% |
| F70 | 355 | 0 | 250 | 25% | 212 | 40% | 180 | 65% | 150 | 3% |
| F80 | 300 | 0 | 212 | 25% | 180 | 40% | 150 | 65% | 125 | 3% |
| F90 | 250 | 0 | 180 | 20% | 150 | 40% | 125 | 65% | 106 | 3% |
| F100 | 212 | 0 | 150 | 20% | 125 | 40% | 106 | 65% | 90 | 3% |
| F120 | 180 | 0 | 125 | 20% | 106 | 40% | 90 | 65% | 75 | 3% |
| F150 | 150 | 0 | 106 | 15% | 90 | 40% | 75 | 65% | 63 | 3% |
| F180 | 125 | 0 | 90 | 15% | 75 | * | 63 | 40% | 53 | * |
| F220 | 106 | 0 | 75 | 15% | 63 | * | 53 | 40% | 45 | * |