Brown aluminum oxide (BFA) is made from high quality bauxite by fusing in an electric arc furnace at high temperature. It has good toughness and high hardness. It is suitable for producing vitrified and resin bonded tools, and for lapping, polishing, and sand blasting and surface preparation
BFA can be also used to make superior refractory products.
Instruction:
Typical Chemical Analysis:
Al2O3 |
95.72% |
TiO2 |
2.25% |
SiO2 |
0.88% |
Fe2O3 |
0.09% |
Physical Properties:
Color |
Brown |
Shape |
Blocky |
Crystal Form |
Alpha alumina trigonal system |
Specific Gravity |
3.92 |
Hardness |
2090 Knoop scale, 9.0 Mohs scale |
Magnetic Material |
0.0076% |
Split Sizes Available :
F12-F240, P12-P240
20-0mm, 20-10mm, 8-5mm, 5-3mm, 3-1mm, 1-0mm,
8/16mesh, 16/30mesh, 30/60mesh,
0-100mesh, 0-200mesh, 0-325mesh,
Other size available upon request.
Magnetic Matters Contents (% by weight) | |
Grit No. |
Magnetic Matters Content |
16#-30 |
<0.0380 |
36#-60# |
<0.0280 |
70-120# |
<0.0230 |
150#-220# |
<0.0170 |
Available grain sizes | |||||
Grit No. |
Micron |
Grit No. |
Micron |
Grit No. |
Micron |
10 |
2360 ~ 2000 |
30 |
710 ~ 600 |
80 |
212 ~ 180 |
12 |
2000 ~ 1700 |
36 |
600 ~ 500 |
90 |
180 ~ 150 |
14 |
1700 ~ 1400 |
40 |
500 ~ 425 |
100 |
150 ~ 125 |
16 |
1400 ~ 1180 |
46 |
425 ~ 355 |
120 |
125 ~ 106 |
20 |
1180 ~ 1000 |
54 |
355 ~ 300 |
150 |
106 ~ 75 |
22 |
1000 ~ 850 |
60 |
300 ~ 250 |
180 |
90 ~ 63 |
24 |
850 ~ 710 |
70 |
250 ~ 212 |
220 |
75 ~ 53 |
Available mircron powder sizes | ||||||||
China GB 2477-83 |
JIS |
FEPA(84) / DIN(70) | ISO(77) | |||||
Grit No. |
Norminal size range(µm) |
Grit No. |
ds50 value (µm) |
Grit No. |
ds50 value (µm) |
Grit No. | ds50 value (µm) | |
Standard werte der Mikro-F-Reihe | Sedigraph 5000D | |||||||
240 |
60.0±4.0 |
P240 |
58.5±2.0 |
|||||
280 |
52.0±3.0 |
P280 |
52.2±2.0 |
|||||
W63 |
63 - 50 |
320 |
46.0±2.5 |
F230/53 |
53±3.0 |
50.0±3.0 |
P320 |
46.2±1.5 |
W50 |
50 - 40 |
360 |
40.0±2.0 |
F240/45 |
44.5±2.0 |
42.0±2.0 |
P360 |
40.5±1.5 |
400 |
34.0±2.0 |
P400 |
35.0±1.5 |
|||||
W40 |
40 - 28 |
500 |
28.0±2.0 |
F280/37 |
36.5±1.5 |
34.5±1.5 |
P500 |
30.2±1.5 |
600 |
24.0±1.5 |
F320/29 |
29.2±1.5 |
27.7±1.5 |
P600 |
25.8±1.0 |
||
W28 |
38 - 20 |
700 |
21.0±1.3 |
F360/23 |
22.8±1.5 |
21.6±1.5 |
P800 |
21.8±1.0 |
800 |
18.0±1.0 |
F400/17 |
17.3±1.0 |
16.5±1.0 |
P1000 |
18.3±1.0 |
||
W20 |
20 - 14 |
1000 |
15.5±1.0 |
F500/13 |
12.8±1.0 |
12.3±1.0 |
P1200 |
15.3±1.0 |
W14 |
14 - 10 |
1200 |
13.0±1.0 |
|||||
1500 |
10.5±1.0 |
F600/9 |
9.3±1.0 |
9.0±1.0 |
||||
W10 |
10 - 7 |
2000 |
8.5±0.7 |
|||||
W7 |
7 - 5 |
2500 |
7.0±0.7 |
F800/7 |
6.5±1.0 |
6.3±1.0 |
||
W5 |
5 - 3.5 |
3000 |
5.7±0.5 |
F1000/5 |
4.5±0.8 |
4.5±0.8 |
||
F1200/3 |
3.1±0.5 |
3.1±0.5 |
||||||
for general purposes |
for general purposes | for bonded abrasives | for coated abrasives |
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