Fused Mullite is produced by melting high-purity industrial alumina and high-quality quartz sand (or high-purity bauxite) in an electric arc furnace at temperatures exceeding 2000°C, followed by controlled cooling and crystallization.
Specification
Items
Unit
Index
Al2O3
%
71-76
SiO2
%
24-29
Fe2O3
%
0.10
Na2O
%
0.35max
CaO
%
0.10max
TiO2
%
0.10max
Bulk Density
g/cm3
2.90min
Mullite phase
%
93min
Grain Size
mm
5-3,3-1,1-0 or customized
Fine Powder
mesh
-200,-325 or customized
Application
Compared with Sintered Mullite, Fused Mullite features larger crystals, a denser structure, and a more uniform glass phase distribution. It offers low thermal expansion, excellent creep resistance, and strong chemical corrosion resistance. It is a key lining material for demanding applications in metallurgy, glass, ceramics, electronics, and other high-temperature industries.
