White fused aluminum oxide 15-20um for wet sandblasting of silicon wafer
After slicing silicon wafer, sandblasting treatment can remove the oxide layer and improve the flatness. The commonly used sandblasting method is wet micro-sandblasting. The blasting media for this application is white fused aluminum oxide 15-20um powder.
White fused aluminum oxide powder is finely processed from fused alumina, with uniform particle size and high grinding efficiency. At the same time, WFA 15-20um powder is dried through overflow precipitation. Thus, it has good fluidity without agglomeration or clump.
CHEMICAL COMPOSITION of white fused aluminum oxide 15-20um:
| Item | Guarantee Value(%) | Typical Value(%) |
| Al2O3 | ≥99.2 | 99.55 |
| Fe2O3 | ≤0.04 | 0.02 |
| SiO2 | ≤0.20 | 0.11 |
| Na2O | ≤0.30 | 0.22 |
| MgO | ≤0.05 | 0.04 |
| CaO | ≤0.05 | 0.03 |
| K2O | ≤0.05 | 0.04 |
PHYSICAL PROPERTIES:
| Specific Weigh | Hardness | PH Value | Melting Point |
| 3.95 g/ cm3 | 9.0Mohs scale | 7-9.5 | 2050℃ |
PARTICLE SIZE DISTRIBUTION (Laser Analyzer LS609) :
| Size | White fused aluminum oxide 800 mesh | White fused aluminum oxide 1000 mesh |
| D10 | ≥10 um | ≥8 um |
| D50 | 18-21 um | 14-17 um |
| D90 | ≤33 um | ≤28 um |
