Mircrogrits of white aluminum oxide
White aluminum oxide was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase α-Al2O3.
Zhengzhou haixu abrasives co.,ltd,manufacturer of white aluminum oxide from China for more than 20 years,the mircogrits of white aluminum oxide produce is as follows:
JIS standard #240-#30000
| Microgrit | D50(um) | Microgrit | D50(um) |
| #240目 | 57.0±3.0 | #1200目 | 9.5±0.8 |
| #280目 | 48.0±3.0 | #1500目 | 8.0±0.6 |
| #320目 | 40.0±2.5 | #2000目 | 6.7±0.6 |
| #360目 | 35.0±2.0 | #2500目 | 5.5±0.5 |
| #400目 | 30.0±2.0 | #3000目 | 4.0±0.5 |
| #500目 | 25.0±2.0 | #4000目 | 3.0±0.4 |
| #600目 | 20.0±1.5 | #6000目 | 2.0±0.4 |
| #700目 | 17.0±1.5 | #8000目 | 1.2±0.3 |
| #800目 | 14.0±1.0 | #10000目 | 0.9±0.1 |
| #1000目 | 11.5±1.0 | #30000目 | 0.5±0.1 |
FEPA standard F230-F2000
| Microgrit | D50(um) | Microgrit | D50(um) |
| F230 | 53.0±3.0 | F600 | 9.3±1.0 |
| F240 | 44.5±2.0 | F800 | 6.5±1.0 |
| F280 | 36.5±1.5 | F1000 | 4.5±0.8 |
| F320 | 29.2±1.5 | F1200 | 3.0±0.5 |
| F360 | 22.8±1.5 | F1500 | 2.0±0.4 |
| F400 | 17.3±1.0 | F2000 | 1.2±0.3 |
| F500 | 12.8±1.0 |
W standard W63-W0.5
| Microgrit | D50(um) | Microgrit | D50(um) |
| W63 | 63-50 | W7 | 7-5 |
| W50 | 50-40 | W5 | 5-3.5 |
| W40 | 40-28 | W3.5 | 3.5-2.5 |
| W28 | 28-20 | W2.5 | 2.5-1.5 |
| W20 | 20-14 | W1.5 | 1.5-1.0 |
| W14 | 14-10 | W1 | 1.0-0.8 |
| W10 | 10-7 | W0.5 | 0.6-0.4 |