White Fused Alumina Micro Powder is a finer grade White Fused Alumina Powder with main content Aluminium Oxide(Al2O3) made sieved by water pressure. It’s a single crystal, self-sharpening, abrasion-resistant abrasives for precision grinding, polishing, cutting, etc. White Fused Alumina finer grades are further graded into China GB, FEPA, JIS, or ANSI standards for precision abrasives, cutting, blasting, or polishing. It’s also used for precision abrasive tools for special equipment.
White Fused Alumina Fine Powder‘s property is more concentrated in particle size distribution than an ordinary fine powder, making refractory and foundry the application effect better.
White Fused Alumina Fine Powder
| Using | Specifications | The main chemical components % | |||||
| Al2O3 | Fe2O3 | SiO2 | Na2O | CaO | |||
| Refractory | Fine powder | 180#—0 | ≥99.0 | <0.05 | <0.05 | ≤0.35 | － |
| 240#-0 | |||||||
| 320#-0 | |||||||
| Foundry | Fine powder | 200#-0 | ≥99.0 | ≤0.1 | ≤0.1 | ≤0.35 | － |
| 270#-0 | |||||||
| 320#-0 | |||||||
White Fused Alumina Powder Micro Series Sizes—JIS Standard
| Bonded abrasives micro size distribution | ||||||||
| (μm) | （μm） | |||||||
| Settlement pipe particle size analysis method | Electric-resistivity grain counter method | |||||||
| 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 | |||||||
White Fused Alumina Powder Micro Series Sizes—FEPA Standard
| F230-F2000 bonded abrasives micro size distribution | ||||||
| (μm) | （μm） | |||||
| Settlement pipe particle size analysis method | Photoelectricity settlement method | |||||
| 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 | |||||
White Fused Alumina Powder Micro Series Sizes—P Standard
| (μm) | ||||
| Settlement pipe particle size analysis method | ||||
| 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 |
CHINA GB White Fused Alumina Powder Micro Series Sizes—W Micro National Standard
| Size | distribution(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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