INTRODUCTION:

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