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Brown aluminium oxide/brown fused alumina is fused and crystallized under high temperature from a mixture of bauxite and other and other raw materials. It is characterized by its high hardness,good toughness and shape in size. Abrasives tools made of it are suitable for grinding metals of high-tensile strength such as: carbon steel,general-purpose alloy steel,annealed malleable iron and hard broze,etc.It also can be used as refractory materials.
Abrasives Grade:
Grit Size: 16#,20#,24#30#,36#,46#,54#,60#,80#,100#,120#,150#,180#,220#
Micropowder: 240#,280#,320#,360#,400#,500#,600#,800#,1000#,1200#,1500#
2000#,2500#,3000#,4000#
Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320mesh
The physical and chemical analysis
Al2O3 MIN 95%
TiO2 MAX 3.0%
Fe2O3 MAX .3%
SiO2 MAX 1.5%
Crystalsys tem : Hexagonal
Color: Brown
Micro hardness : HV1800-2200
Grinding ability(compared with diamond as one): 0.10
Hardness(mohs) : 9
Ture density : 3.9 g/cm3
Bulk density : 1.68-1.95g/cm3
Purpose |
Specification |
Chemical Composition(%) |
Magnetic material content(%)max |
||||
Abrasives grade |
Al2O3min |
Fe2O3max |
SiO2max |
TiO2max |
|||
grain |
12-80 |
95 |
0.3 |
1.5 |
3.0 |
0.05 |
|
90-150 |
94 |
0.3 |
1.5 |
3.0 |
0.03 |
||
180-220 |
93 |
0.3 |
1.5 |
3.5 |
0.02 |
||
micropowder |
240-4000 |
92.5 |
0.5 |
1.8 |
4.0 |
— |
|
Refractory grade |
Group Size |
0-1mm 1-3mm 3-5mm 5-8mm |
94.5 |
0.3 |
1.5 |
3.0 |
— |
Fine Powder |
-180mesh -200mesh -240mesh -320mesh |
93.5 |
0.5 |
1.5 |
3.5 |
— |
|
color |
Dark brown |
||||||
Hardness(mohs) |
9.0 |
||||||
Melting point(℃) |
2250 |
||||||
Maximum service temperature(℃) |
1900 |
||||||
Ture density(g/cm3) |
3.9 |
||||||
Application:
1. Sanding blasting
2. Resinoid high bonded abrasive tooles
3. Grinding abrasive
4. Polishing materials
5. Precision casting
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