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White Fused Alumina

White Fused Alumina is produced by fusing calcined alumina in an electric arc furnace under carefully controlled conditions at high temperature. The dense mineral is white in color, and has predominantly large crystals of Alpha Alumina.

Refractory Raw Material - White Fused Alumina, Fused Alumina

White Fused Alumina (WFA or WA) is an important raw material for advanced refractories and abrasives, a widely used raw material in refractories, ceramics shapes, grinding wheels, sandpaper, blasting media, metal preparation, laminates, coatings, lapping, polishing, grinding, and hundreds of other applications. As it is a very pure, low iron alumina, specific refractory applications include high tech refractory castables, isostatic pressed refractories, and pre-cast refractory shapes. The benefits of White Fused Alumina in these applications are high alumina content, low impurities, and stability at high temperatures.

KT Refractories distributes white fused alumina grains and powders, available in standard grit and powder sizes, and they can also be made to individual specifications. Contact KT Refractories for white fused alumina or other refractory raw material because we save you time and money!

Call us at 1-877-365-2995 or email us at for your refractory raw material, chemical additives or minerals need!

White Fused Alumina Data Sheet:



Lower sodium (I) Middle sodium (II)
Fraction (mesh)
0-1 1-2 3-5m/m
Fine (mesh)
0-180 0-320
Fraction (mesh)
0-1 1-2 3-5m/m
Fine (mesh)
0-180 0-320
Guaranteed value Typical value Guaranteed value Typical value Guaranteed value Typical value Guaranteed value Typical value
Chemical Composition (%) a-Al2O3 ≥99 99.3 ≥98.5 99.23 ≥99 99.14 ≥98.5 98.75
SiO2 ≤0.2 0.15 ≤0.3 0.22 ≤0.4 0.12 ≤0.4 0.19
Fe2O3 ≤0.2 0.04 ≤0.25 0.04 ≤0.2 0.01 ≤0.25 0.05
Na2O ≤0.15 0.12 ≤0.25 0.18 ≤0.4 0.35 ≤0.5 0.23
Principal crystalline phase a-Al2O3
Crystalline system Hexagon
Color white
True density (g/cm3) ≥3.95
Packing density (g/cm3) 1.75-1.95
Mohs hardness 9
Linear expansion (1/°C) 8.3×10-4
Size (mm) 8-5 5-3 3-1 1-0
Fine (mesh) -80, -120, -240, -320
Micropowder (um) 3-5 5-10
Test standard GB/T3044-89
Packing 25 kg/bag, 1000 kg/big bag
Usage Refractories