White Electro 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 Electro corundum 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
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1,Used for refractory,castable
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Items
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0-1 1-3 3-5m m
|
0-100 0-200 0-320
|
|
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
|
Items
|
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
|
Items
|
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
|