White fused alumina electrically fused in arc furnace with high grade processed alumina as raw material. It has higher hardness and slight lower toughness comparing with brown fused alumina. It is also characterized by its high purity, ability of self-sharpening, better cutting, less heat emit, higher efficiency.
White fused aluminum oxide becomes the first choice for the sandblasting technics, meanwhile, it is also the ideal material for abrasive and workpiece cleaning, and polishing.
| 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: | |
| FEPA | F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 |
| JIS | 240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000# 10000# |
PSD for white aluminum oxide micropowder：
| ITEM | D0（um） | D3(um) | D50(um) | D94(um) |
| #240 | ＜127 | ＜103 | 57.0±3.0 | ＞40 |
| #280 | ＜112 | ＜87 | 48.0±3.0 | ＞33 |
| #320 | ＜98 | ＜74 | 40.0±2.5 | ＞27 |
| #360 | ＜86 | ＜66 | 35.0±2.0 | ＞23 |
| #400 | ＜75 | ＜58 | 30.0±2.0 | ＞20 |
| #500 | ＜63 | ＜50 | 25.0±2.0 | ＞16 |
| #600 | ＜53 | ＜41 | 20.0±1.5 | ＞13 |
| #700 | ＜45 | ＜37 | 17.0±1.5 | ＞11 |
| #800 | ＜38 | ＜31 | 14.0±1.0 | ＞9.0 |
| #1000 | ＜32 | ＜27 | 11.5.±1.0 | ＞7.0 |
| #1200 | ＜27 | ＜23 | 9.5±0.8 | ＞5.5 |
| #1500 | ＜23 | ＜20 | 8.0±0.6 | ＞4.5 |
| #2000 | ＜19 | ＜17 | 6.7±0.6 | ＞4.0 |
| #2500 | ＜16 | ＜14 | 5.5±0.5 | ＞3.0 |
| #3000 | ＜13 | ＜11 | 4.0±0.5 | ＞2.0 |
| #4000 | ＜11 | ＜8.0 | 3.0±0.4 | ＞1.8 |
| #6000 | ＜8.0 | ＜5.0 | 2.0±0.4 | ＞0.8 |
| #8000 | ＜6.0 | 3.5 | 1.2±0.3 | ＞0.6 |