Futong Industry Co., Ltd.

Products

	White Fused Alumina

Model Number

White fused alumina

White fused alumina is made from high quality Bayer-processed alumina by fusing in an electric arc furnace at high temperature. It has high hardness and better cutting characteristics. It is suitable for manufacturing of vitrified and resinoid tools, and for lapping, polishing and blasting. It can be also used to make engineering ceramic and superior refractory products.

Chemical & Physical Properties
Crystal Form Alpha alumina trigonal system
Chemical nature Amphoteric
Reaction with acids Attck less than brown fused alumina
Reaction with Alkalies Very slight with strong hot solution only
Oxidation-reduction effects None
True Density (g/cm3) 3.96
Hardness Knoop (kg/cm2) 2000-2200
Moh� 9.0
Color White
Color after firing White
Melting point 2000oC
Max usable temperature 1900oC
Specific heat (cal/g.oC) 20oC 100oC
0.183 0.217
Coefficient of thermal conductivity (cal/cm2.sec oC) Room temperature 900oC
0.047 0.013
Electrical resistivity (Wcm) 30oC 300oC 900oC 1600oC
1016 1013 105 104
Coefficient of liner expansion (x10-6) 25oC-500oC 25oC-1000oC 25oC-1500oC
7.58 8.52 9.29

Chemical Composition

Grit 12# - 90# 100# - 220# 230# - 400# 500# - 1200#
Al2O3 98.5 min 98.5 min 98.0 min 97.0 min
Na2O 0.5 max 0.7 max 0.8max 0.8max

Magnetic Material Content (% by weight)
Grit Magnetic Material Content
16#-24# <0.0023
30#-120# <0.0021
150#-240# <0.0015

Available Sizes

F10-F220, F230-1200,W63-W5,JIS240-JIS3000.
Other sizes can be also available according to customers requirements

Applications

Vitrified tools Lapping
Resinoid tools Blasting
Coated tools Scrubing
Engineering ceramic Deburring
Investment casting Non-slip
Polishing Refractory

White Fused Alumina Refractories (% by weight)
Group Sizes Mixed Sizes
Sizes(mm) Chemical conntent Sizes(mm) Chemical Content
30-10, 8-5
5-3, 3-1
4-2, 2-1
1-0.5 Al2O3> 98
SiO2<0.1
Na2O<0.5
CaO<0.1 50-0
10-0
25-0
5-0 Al2O3>98
SiO2<0.1
Na2O<0.5
CaO<0.1

Packing

25 kgs or 50 kgs packed in three layers bags, or can be packed on request.