| WA(White Fused Alumina Powder)
WA micro-powder's raw material is r-Al2O3. It is fused in electric furnace under high temperature, and is made after process of crashing, classification, sieving, etc.
The appearance of WA is white crystal. Its gravity is 3.9-3.95 g/cm3. It contains ＞99% Al2O3 and is with good chemical stability.
The Mohs Hardness of WA is 9.5. Its brittleness is higher than Brown Fused Alumina. With fine sharpness, it's fit for lapping and polishing electric material, quenching steel, high-carbon steel and high-speed steel, etc.
Properties of WA：
(1)Particle Size
| Particle Size |
Particle Size Distribution(um) |
| Maximum Particle Size in um |
Particle size at 3% point |
Particle size at 50% point |
Particle size at 94% point |
| #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 |
43 |
20.0±1.5 |
13 |
| #700 |
45 |
37 |
17.0±1.3 |
11 |
| #800 |
38 |
31 |
14.0±1.0 |
9 |
| #1000 |
32 |
27 |
11.5±1.0 |
7 |
| #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 |
1.3 |
(2)Chemcial composition:
| Product |
Gravity (g/cm3) |
Al2O3 |
SiO2 |
Fe2O3 |
| WA#240-#3000 |
3.90 |
≥99% |
＜0.3% |
＜0.15% |
|
