Item unit typical standard test method
al (oh)3 % 99.6 max 99.5 by difference
al2o3 % 64.50 max 65.00 by difference
sio2 % 0.08 max 0.015 isiri 908
fe2o3 % 0.010 max 0.020 isiri 904
na2o % 0.33 max 0.40 isiri 10616
cao % 0.009 max 0.020 isiri 10619
l.o.i % 34.7 max 35 isiri 8346
moisture % 7 max 10 isiri 8346
-44 m % 11 max 15 iso 13320
+150 m % 14 max 25 iso 13320
median m 92 80-120 iso 13320.

0-1 mm 1-3 mm 3-6 mm -325 mesh
al2o3 99.67 % al2o3 99.70 % al2o3 99.70 % al2o3 99.67 %
sio2 0.02% sio2 0.02 % sio2 0.02 % sio2 0.04 %
fe2o3 0.05 % fe2o3 0.06 % fe2o3 0.04 % fe2o3 0.04 %
na2o 0.18 % na2o 0.17% na2o 0.18 % na2o 0.19 %
cao 0.04 % cao 0.03 % cao 0.03 % cao 0.04 %

+1.4 mm 0 % +4 mm 0% +6.3 mm 3% +325 mesh 0.80 %
0.16 mm 10.50 % -1 mm 0.20 % -2 mm 0.20 % -325 mesh 99.20 %.

Black aluminum oxide supplied by our principles, which has good features as high hardness, strong tenacity, better bonding ability and hydrophilicity, giving less heat, good self sharpening, smooth surface and high finish. It's suitable for polishing various spare parts such as, bicycles, sewing machine, hard metal tools, medical apparatus, time pieces, glass products and stone grinding.

It's also the right material for making abrasive tools: fiber-reinforced cutting wheels, grinding wheels, sand cloth paper and paste.

Range of grits chemical composition (% by weight)
al2o3 sio2 fe2o3 tio2
24#-100# 77.00min 11.0 min 5.0 1.5-3.5
120#-200# 75-81 9-12 4-6 2-3
240#-280# 64.0 min 10.0 min 7.0 min 1.5-3.0

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 46 425 355 120 125 105
20 1180 1000 54 355 300 150 106 75
22 100 850 60 300 250 180 90 63
24 850 710 70 250 212 220 75 53

White fused aluminaWhite aluminum oxide (WA) is electrically fused in the furnace with high grade Bayer processed alumina as raw material. It has high purity, ability of self-sharpening, better cutting, less heat emit, higher Efficiency, acid and alkali resistance, good thermal stability. Abrasives tools made of it are suitable for grinding high-speed, high carbon steel, etc. It also can be used as materials for grinding and polishing, precision casting, spaying and coating, medium body for chemical industry, special ceramics and high-grade refractory materials etc.

The physical and chemical analysis

Al2O3 MIN 99.53%
Na2O MAX 0.4%
Fe2O3 MAX 0.1%
SiO2 MAX 0.1%
Crystal system Hexagonal
Color White
Micro Hardness HV2200-2300
Grinding ability (compared with diamond as one) 0.12
Hardness (mohs) 9
Ture density 3.9 gcm3
Bulk density 1.75-1.95 gcm3

Purpose Specifications Chemical Composition Magnetic material Content (%) Max
Abrasives Grade AL2O3 Min. Fe2O3 Max SiO2 Max TiO2 Max
Grain 12-80 99 0.05 0.26 0.08 0.0023
90-150 99 0.06 0.28 0.09 0.0021
180-220 99 0.08 0.30 0.10 0.0018
Micro powder 240-4000 98.5 0.1 0.40 0.15 -
Refractory Grade Group Size 0-1 mm
1-3 mm
3-5 mm
5-8 mm 99 0.1 0.35 0.3 -
Fine Powder -180 Mesh
-200 Mesh
-240 Mesh
-320 Mesh 99 0.1 0.35 0.3 -
Color White
Hardness (mohs) 9.0

Melting point C 2250
Maximum Service Temperature C 1900
Ture Density (gcm3) 3.9


Abrasives grade

Grain: 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
Application
1. It is suitable for Grinding High Speed, High Carbon Steel.
2. High Grade refractory Materials.
3. Abrasive Tools
4. Grinding & Polishing
5. Ceramics
6. LED