白剛玉微粉是一種較細的白剛玉粉，主要成分為氧化鋁（Al2O3），經水壓篩分而成。它是一種單晶、自銳、耐磨磨料，用於精密研磨、拋光、切割等。 白剛玉更細的牌號進一步分級為中國 GB、FEPA、JIS 或 ANSI 精密磨料、切割、噴砂、或拋光。也用於特殊設備的精密磨俱。
白剛玉細粉在粒度分佈上比普通細粉更集中，使耐火材料和鑄造應用效果更好。
白色電熔氧化鋁細粉
| 使用 | 規格 | 主要化學成分% | |||||
| 氧化鋁 | Fe2O3 | 二氧化矽 | 氧化鈉 | CaO | |||
| 耐火 | 細粉 | 180#—0 | ≥99.0 | <0.05 | <0.05 | ≤0.35 | － |
| 240#-0 | |||||||
| 320#-0 | |||||||
| 鑄造廠 | 細粉 | 200#-0 | ≥99.0 | ≤0.1 | ≤0.1 | ≤0.35 | － |
| 270#-0 | |||||||
| 320#-0 | |||||||
白色電熔氧化鋁粉微系列尺寸—JIS標準
| 固結磨俱微觀粒度分佈 | ||||||||
| (微米) | （微米） | |||||||
| 沉降管粒度分析方法 | 電阻率顆粒計數器法 | |||||||
| ds0 | ds3 | ds50 | ds94 | ds0 | ds3 | ds50 | ds94 | |
| #240 | 127 | 90 | 60±4.0 | 48 | 127 | 103 | 57±3.0 | 40 |
| #280 | 112 | 79 | 52±3.0 | 41 | 112 | 87 | 48±3.0 | 33 |
| #320 | 98 | 71 | 46±2.5 | 35 | 98 | 74 | 40±2.5 | 27 |
| #360 | 86 | 64 | 40±2.0 | 30 | 86 | 68 | 35±2.0 | 23 |
| #400 | 75 | 56 | 34±2.0 | 25 | 75 | 58 | 30±2.0 | 20 |
| #500 | 65 | 48 | 28±2.0 | 20 | 63 | 50 | 25±2 | 16 |
| #600 | 57 | 43 | 24.0±1.5 | 17 | 52 | 41 | 20±1.5 | 13 |
| #700 | 50 | 39 | 21.0±1.3 | 14 | 45 | 37 | 17±1.3 | 11 |
| #800 | 46 | 35 | 18.0±1.0 | 12 | 38 | 31 | 14±1.0 | 9 |
| #1000 | 42 | 32 | 15.5±1.0 | 9.5 | 32 | 27 | 11.5±1.0 | 7 |
| #1200 | 39 | 28 | 13.0±1.0 | 7.8 | 27 | 23 | 9.5±0.8 | 5.5 |
| #1500 | 36 | 24 | 10.5±1.0 | 6 | 23 | 20 | 8.0±0.6 | 4.5 |
| #2000 | 33 | 21 | 8.5±0.7 | 4.7 | 19 | 17 | 6.7±0.6 | 4 |
| #2500 | 30 | 18 | 7.0±0.7 | 3.6 | 16 | 14 | 5.5±0.5 | 3 |
| #3000 | 28 | 16 | 5.7±0.5 | 2.8 | 13 | 11 | 4.0±0.5 | 2 |
| #4000 | 4.7±0.4 | 11 | 8 | 3.0±0.4 | 1.3 | |||
| #6000 | 8 | 5 | 2.0±0.4 | 0.8 | ||||
| #8000 | 6 | 3.5 | 1.2±0.3 | 0.6（ds75） | ||||
| #10000 | 0.8±0.2 | |||||||
白色熔融氧化鋁粉 微型系列尺寸 – FEPA 標準
| F230-F2000固結磨俱微觀粒度分佈 | ||||||
| (微米) | （微米） | |||||
| 沉降管粒度分析方法 | 光電結算方式 | |||||
| ds3 | ds50 | ds94 | ds3 | ds50 | ds94 | |
| F230 | 77 | 55.7±3.0 | 38 | 82 | 53.0±3.0 | 34 |
| F240 | 68 | 47.5±2.0 | 32 | 70 | 44.5±2.0 | 28 |
| F280 | 60 | 39.9±1.5 | 25 | 59 | 36.5±1.5 | 22 |
| F320 | 52 | 32.8±1.5 | 19 | 49 | 29.2±1.5 | 16.5 |
| F360 | 46 | 26.7±1.5 | 14 | 40 | 22.8±1.5 | 12 |
| F400 | 39 | 21.4±1.0 | 10 | 32 | 17.3±1.0 | 8 |
| F500 | 34 | 17.1±1.0 | 7 | 25 | 12.8±1.0 | 5 |
| F600 | 30 | 13.7±1.0 | 4.6 | 19 | 9.3±1.0 | 3 |
| F800 | 26 | 11.0±1.0 | 3.5 | 14 | 6.5±1.0 | 2 |
| F1000 | 23 | 9.1±0.8 | 2.4 | 10 | 4.5±0.8 | 1 |
| F1200 | 20 | 7.6±0.5 | 2.4 | 7 | 3.0±0.5 | 80% 1 |
| F1500 | 5 | 2.0±0.4 | 80% 0.8 | |||
| F2000 | 3.5 | 1.2±0.3 | 80% 0.5 | |||
| F2500 | 0.8±0.1 | |||||
| F3000 | 0.4±0.5 | |||||
白色熔融氧化鋁微粉系列尺寸—P 標準
| (微米) | ||||
| 沉降管粒度分析方法 | ||||
| ds0 | ds3 | ds50 | ds94 | |
| P240 | 110 | 81.7 | 58.5±2.0 | 44.5 |
| P280 | 101 | 74 | 52.2±2.0 | 39.2 |
| P320 | 94 | 66.8 | 46.2±2.0 | 34.2 |
| P360 | 87 | 60.3 | 40.5±2.0 | 29.6 |
| P400 | 81 | 58.9 | 35.5±1.5 | 25.2 |
| P500 | 77 | 48.3 | 30.2±1.5 | 21.5 |
| P600 | 72 | 43 | 25.8±1.0 | 18 |
| P800 | 67 | 38.1 | 21.8±1.0 | 15.1 |
| P1000 | 63 | 33.7 | 18.3±1.0 | 12.4 |
| P1200 | 58 | 29.7 | 15.3±1.0 | 10.2 |
| P1500 | 58 | 25.8 | 12.6±1.0 | 8.3 |
| P2000 | 58 | 22.4 | 10.3±0.8 | 6.7 |
| P2500 | 58 | 19.3 | 8.4±0.5 | 5.4 |
中國國標白剛玉粉微系列尺寸—W微國標
| 尺寸 | 分佈(μm) |
| W63 | 63~50 |
| W50 | 50~40 |
| W40 | 40~28 |
| W28 | 28~20 |
| W20 | 20~14 |
| W14 | 14~10 |
| W10 | 10~7 |
| W7 | 7~5 |
| W5 | 5~3.5 |
| W3.5 | 3.5~2.5 |
| W2.5 | 2.5~1.5 |
| W1.5 | 1.5~1 |
| W1 | 1~0.5 |
| W0.5 | 0.5~0 |
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