| |
4-Size |
Powder |
| Al2O3 |
99%
min |
98.5%
min |
| Na2O |
0.4%
max |
0.4
% |
| SiO2 |
0.2%
max |
0.25%
max |
| Fe2O3 |
0.15%
max |
0.5%
max |
| Hardness(Mohs) |
9.0
min |
| True
density |
3.95
g/cc min |
| Principal
crystalline Phase |
¦Á-Al2O3 |
|
index |
White Alumina |
White Alumina
with a little Sodium |
| Al2O3 |
>99% |
>99.3% |
| SiO2 |
<0.15% |
<0.15% |
| Fe2O3 |
<0.1% |
<0.1% |
| Na2O |
<0.3% |
<0.25% |
| Volume density |
¡Ý3.50g/cm3 |
¡Ý3.55g/cm3 |
| Real density |
¦Á-Al2O3 |
| Main crystallographic
direction |
8-5MM 5-3MM
3-1MM 1-10MM |
| Coarseness |
16# 20#
22# 24# 36# 40# 80# 90# 120# |
| Fines |
180F 200F
240F 325F |
| Physical
Properties |
Chemical Composition(%)
|
Particle
Size |
Fine Powder |
| Principal
crystal phase;¦Á-Al2O3 |
Al2O3
|
¡Ý99 |
¡Ý98.5 |
| Cystal system:
Hexzagon |
Na2O |
¡Ü0.4 |
¡Ü0.4 |
| Colour and
lustre: White |
SiO2 |
¡Ü0.2 |
¡Ü0.25 |
| True densyty(g/cm3):¡Ý3.95 |
Fe2O3 |
¡Ü0.15 |
¡Ü0.5 |
| Packing
density(g/cm3):1.75-1.95 |
| Mohs hardness:9 |
| Linear expansion
Coefficent (1/¡ãC):8.3¡Á10-4 |
| Grain size(mm) |
3~5, 1~3,
0~1 |
| Fine Powder(mesh) |
80,120,240,320
etc |
| Micro Powder(um) |
3~5,5~10 |
| |
Typical |
Min |
Max |
| Al2O3 |
98.21 |
98.00 |
- |
| Fe2O3 |
0.10 |
- |
0.20 |
| Na2O |
0.01 |
- |
0.05 |
| SiO2 |
0.31 |
- |
0.50 |
| TiO2 |
1.05 |
- |
1.20 |
| Magnetism |
0.03 |
- |
0.05 |
| Water |
0.05 |
- |
0.20 |
| B.D.g/cm3 |
3.95 |
3.90 |
- |
| Mesh sizes |
-1mm,1-3mm.3-5mm,-60mesh(250um),3¡Á6mesh,6¡Á4mesh,14¡Á70mesh,4¡Á10mesh,-4mesh,-14mesh,-70mesh,-100mesh,-200mesh,-325mesh. |
Chemical composition(%)
Grain Size Range |
Al2O3 |
Na2O |
Fe2O3 |
Min |
Typical |
Max |
Typical |
Max |
Typical |
| 12#-90# |
98.50 |
99.50 |
0.40 |
0.35 |
0.05 |
0.04 |
| 100#-240# |
98.50 |
99.50 |
0.40 |
0.38 |
0.05 |
0.04 |
| 240#-0 |
98.00 |
99.00 |
0.50 |
0.45 |
0.05 |
0.04 |
| 320#-0 |
97.50 |
99.00 |
0.50 |
0.45 |
0.05 |
0.04 |
| 1-0
8-0 |
98.50 |
99.50 |
0.40 |
0.36 |
0.06 |
0.05 |
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