Brown Fused Alumina (BFA)
High Purity Alumina for Abrasives and Refractories
High Purity Alumina for Abrasives and Refractories
|
Items
|
Unit
|
Index
|
Typical
|
|
|
Chemical composition |
Al2O3 |
% |
95%min |
95.5% |
|
SiO2 |
% |
1.50max |
1.33% |
|
|
Fe2O3 |
% |
0.50max |
0.18% |
|
|
Ti2O |
% |
3.50max |
2.45% |
|
|
CaO |
% |
0.30% |
0.11% |
|
|
Melting point |
|
2050 |
||
|
Refractoriness |
|
1980 |
||
|
True density |
g/cm 3 |
3.90min |
||
|
Mohs hardness
|
--- |
9.00min |
||
|
Grain size
|
mm |
0-50.0-1, 1-3, 3-5.5-8 |
||
|
Fine powder
|
mesh |
-100, -200, -325 |
||
|
Abrasive grade
|
FEPA |
F12---F30F150-F220 |
||
Grits No: F8F10F12F14F16F20F22F24F30F36F40F46F54F60F70F80F90F100F120F150F180F220
|
Grits NO:
|
cumuli density
|
Grits No
|
cumuli density
|
|
F8
|
1.96-2.06
|
F46
|
1.73-1.83
|
|
F10
|
1.95-2.05
|
F54
|
1.73-1.82
|
|
F12
|
1.93-2.03
|
F60
|
1.71-1.81
|
|
F14
|
1.91-2.01
|
F70
|
1.66-1.76
|
|
F16
|
1.89-1.99
|
F80
|
1.64-1.74
|
|
F20
|
1.89-1.99
|
F90
|
1.63-1.72
|
|
F22
|
1.88-1.98
|
F100
|
1.63-1.71
|
|
F24
|
1.87-1.97
|
F120
|
1.60-1.70
|
|
F30
|
1.83-1.93
|
F150
|
1.58-1.68
|
|
F36
|
1.82-1.92
|
F180
|
1.58-1.68
|
|
F40
|
1.78-1.88
|
F220
|
1.58-1.65
|
Magnetism Material Content:
8# -30# ≤ 0.0250
36# -70# ≤ 0.0200
80# -120# ≤ 0.0150
150# -220# ≤ 0.0120