white fused alumina (WFA ;WA)

white fused alumina (WFA ;WA)
  • Post Date: 10/23/2007
  • Expiry Date: 1/21/2008
white fused alumina (WFA ;WA)

Detailed Product Description

4-Size Powder
Al2O3 99% min 98.5% min
Na2O 0.4% max 0.4 %
SiO2 0.2% max 0.25% max
Fe2O3 0.15% max 0.5% max
Hardness(Mohs) 9.0 min
True density 3.95 g/cc min
Principal crystalline Phase α-Al2O3
index White Alumina White Alumina with a little Sodium
Al2O3 >99% >99.3%
SiO2 <0.15% <0.15%
Fe2O3 <0.1% <0.1%
Na2O <0.3% <0.25%
Volume density ≥3.50g/cm3 ≥3.55g/cm3
Real density α-Al2O3
Main crystallographic direction 8-5MM 5-3MM 3-1MM 1-10MM
Coarseness 16# 20# 22# 24# 36# 40# 80# 90# 120#
Fines 180F 200F 240F 325F

Physical Properties
Chemical Composition(%)
Particle Size Fine Powder
Principal crystal phase;α-Al2O3
Al2O3 ≥99 ≥98.5
Cystal system: Hexzagon Na2O ≤0.4 ≤0.4
Colour and lustre: White SiO2 ≤0.2 ≤0.25
True densyty(g/cm3):≥3.95 Fe2O3 ≤0.15 ≤0.5
Packing density(g/cm3):1.75-1.95
Mohs hardness:9
Linear expansion Coefficent (1/癈):8.3?0-4
Grain size(mm) 3~5, 1~3, 0~1
Fine Powder(mesh) 80,120,240,320 etc
Micro Powder(um) 3~5,5~10
 Typical Min Max
Al2O3 98.21 98.00 -
Fe2O3 0.10 - 0.20
Na2O 0.01 - 0.05
SiO2 0.31 - 0.50
TiO2 1.05 - 1.20
Magnetism 0.03 - 0.05
Water 0.05 - 0.20
B.D.g/cm3 3.95 3.90 -
Mesh sizes -1mm,1-3mm.3-5mm,-60mesh(250um),3?mesh,6?mesh,14?0mesh,4?0mesh,-4mesh,-14mesh,-70mesh,-100mesh,-200mesh,-325mesh.
Chemical composition(%)
Grain Size Range
Al2O3 Na2O Fe2O3
Min Typical Max Typical Max Typical
12#-90# 98.50 99.50 0.40 0.35 0.05 0.04
100#-240# 98.50 99.50 0.40 0.38 0.05 0.04
240#-0 98.00 99.00 0.50 0.45 0.05 0.04
320#-0 97.50 99.00 0.50 0.45 0.05 0.04
1-0 8-0 98.50 99.50 0.40 0.36 0.06 0.05

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