White Corundum
White Corundum was made from the high quality alumina by melting above 2000 in the electric arc furnace and cooling. It is white with the main crystal phase alpha-Al2O3.The white alumina produced in titling electric arc furnace has the advantage of high bulk density and low porosity and the volume stability and thermal shock resistance can be improved.
Main Physical Properties
|
MOHS HARDNESS
|
9.0
|
|
BULK DENSITY
|
1.75-1.95g/cm3
|
|
SPECIFIC GRAVITY
|
3.95g/cm3
|
Application
1.Bonded abrasives and Coated abrasives
2.Floor / Wall Laminates
3.Thermal Spraying (Plasma Spraying)
4.Lapping & Micro-blasting applications
5.Surface preparation and finishing
6.Super Refractories, Ceramics and Tiles
7.Brake linings
1,Used for refractory,castable
|
Properties
Type
|
0-1 1-3 3-5 5-8mm
|
0-100# 0-200# 0-320# 325#
|
|
Guarantee Value
|
Typical Value
|
Guarantee Value
|
Typical Value
|
|
Chemical
Composition
|
Al2O3
|
≥99
|
99.5
|
≥98.5
|
99.0
|
|
SiO2
|
≤0.4
|
0.06
|
≤0.30
|
0.08
|
|
Fe2O3
|
≤0.2
|
0.04
|
≤0.20
|
0.10
|
|
Na2O
|
≤0.4
|
0.30
|
≤0.40
|
0.35
|
2,Used for abrasives,blasting,grinding
|
properties
Type
|
Grains
|
|
8# 10# 12# 14# 16# 20# 22# 24# 30# 36# 40# 46# 54# 60# 70# 80# 90# 100# 120# 150# 180# 220#
|
|
Guarantee Value
|
Typical Value
|
|
Chemical
Composition
|
Al2O3
|
≥99
|
99.50
|
|
SiO2
|
≤0.2
|
0.04
|
|
Fe2O3
|
≤0.2
|
0.04
|
|
Na2O
|
≤0.30
|
0.23
|
3，Used for abrasives ,lapping,Polishing
|
properties
Type
|
Micropowder
|
|
“W”
|
W63 W50 W40 W28 W20 W14 W10 W7 W5 W3.5 W2.5 W1.5 W0.5
|
|
“FEPA”
|
F230 F240 F280 F320 F360 F400 F500 F600 F800 F1000 F1200 F1500 F2000
|
|
“JIS”
|
240# 280# 320# 360# 400# 500# 600# 700# 800# 1000# 1200# 1500# 2000# 2500# 3000# 4000# 6000# 8000#
|
|
Guarantee Value
|
Typical Value
|
|
Chemical
Composition
|
Al2O3
|
≥99
|
99.20
|
|
SiO2
|
≤0.4
|
0.08
|
|
Fe2O3
|
≤0.2
|
0.06
|
|
Na2O
|
≤0.4
|
0.35
|
Application:
Aggregate for high-quality refractory materials (shaped and non-shaped)
Raw material for refractory brick
Abrasive material
High end refractory products for the steel, foundry , and glass industry
White Corundum F#60