WA 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 alpha-Al2O3.The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved.
|
Physical Properties |
|
|
Hardness: micro |
21600-22600kg/mm3 |
|
Hardness: Mohs |
9.0 min |
|
Specific Gravity |
3.95-3.97g/cm3 |
|
Bulk Density |
1.65-2.05g/cm3 |
|
Particle Shape |
Blocky, Sharp |
|
Color |
white |
|
Chemical compositions |
|
|
Al2O3 |
99.40min |
|
SiO2 |
0.15max |
|
Na2O |
0.28max |
|
Fe2O3 |
0.06max |
|
CaO |
0.03max |
Size Distribution of WA 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 |
Package ：
