Superfine white fused alumina powder, with its ultra-high hardness, sharp cutting edge, excellent chemical and thermal stability, high purity, and controllable particle size, has become an ideal abrasive for polishing high-hardness, high-precision, and high-cleanliness sealing elements such as floating oil seals. White fused alumina powder sizes: #240 #280 #320 #360 #400# #500 #600 #700 #800 #1000 #1200 #1500 #2000 #2500 #3000 #4000 #6000 #8000 #10000
- Description for superfine white fused alumina:
Superfine white fused alumina powder is produced from high-quality aluminum oxide powder, refined and crystallized through electric arc smelting. And it features high purity, excellent self-sharpening properties, resistance to acid and alkali corrosion, high-temperature stability, and stable thermal performance. It is slightly harder than brown fused alumina but less tough. With strong grinding capabilities, low heat generation, and high efficiency, it is suitable for making abrasive tools used for grinding high-carbon steel, high-speed steel, and stainless steel. Fine-grit abrasives can also be used in precision casting and high-grade refractory materials.
- Available grain sizes for white fused alumina:
| Fraction | 0-1mm 1-3mm 3-5mm 5-8mm |
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| Fine Powder | 200#-0 320#-0 |
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| Grit | 8# 12# 14# 16# 20# 24# 30# 36# 46# 54# 60# 70# 80# 90# 100# 120# 150# 180# 220# 240# |
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| Micro Powder | JIS Standard | #240 #280 #320 #360 #400# #500 #600 #700 #800 #1000 #1200 #1500 #2000 #2500 #3000 #4000 #6000 #8000 #10000 |
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| FEPA Standard | F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 |
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- Typical Chemical Analysis for white fused alumina powder:
| Grain Size | Chemical Composition (%) |
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| Al2O3 | Fe2O3 | Na2O | SiO2 |
| Fraction | ≥99 | ≤0.08 | ≤0.35 | ≤0.08 |
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| Fine Powder | ≥98.5 | ≤0.15 | ≤0.40 | ≤0.08 |
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| Grit | ≥99 | ≤0.1 | ≤0.35 | ≤0.08 |
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| Micro Powder | ≥98 | ≤0.1 | ≤0.40 | ≤0.08 |
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- Typical Physical Properties
| Mohs Hardness | 9.0 |
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| Bulk Density | 1.55-1.95g/cm3 |
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| True Density | 3.95g/cm3 |
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| Volume Density | 3.60 |
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| Melting Point | 2250℃ |
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| Maximum Use Temperature | 1800℃ |
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