White Fused Alumina

White Fused Alumina

WhiteOxide1

Oxygen Bonded Silicon
Chemical Properties
Physical Properties
Index

Apparent porosity %	< 18
Mpa cold temperature bending strength	30
Bulk density g/cm³	> 2.58
Refractoriness ℃	≤1650
Mpa cold crushing strength	>100
Using Service Temperature ℃	≥1350
SIC %	≥85
Fe₂O₃	≤0.5

Chemical composition(%) Grain Size Range	Al₂O₃		Na₂O		Fe₂O₃
Chemical composition(%) Grain Size Range	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

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/^°C):8.3×10^-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

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

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