• Mullite Insulation Brick
  • Mullite Insulation Brick
  • Mullite Insulation Brick
  • Mullite Insulation Brick

Mullite Insulation Brick

Catalog: Mullite Insulation Brick | 2021-01-26

1. Al2O3: 30-45%
2. Bulk Density: 0.6-1.2g/cm3

√ High porosity
√ Small volume density
√ High mechanical intensity
√ Small thermal conductivity

Product Details

Mullite insulation brick holds special grade mullite (3Al2O3•2SiO2) as the major crystal phase. The content of alumina in mullite insulating brick is 42%-72%. The service temperature could be 1250℃-1600℃.

Performance Characters:

1.High porosity.
2.Small volume density.
3.Good insulation effect.
4.High mechanical intensity.
5.Small thermal conductivity.


Mullite insulating brick is widely used in different types of high temperature furnaces or kilns. For example, it is widely used for hot-blast furnace, regenerative chamber of glass melting furnace, ceramic kiln, blind angle furnace lining of petroleum cracking system, shuttle kiln, roller kiln and petrochemical burning pits and so on.

Classification Temperature (℃)1350143015401600
Bulk Density (g/cm3)0.6-10.8-10.8-10.8-1
Reheating Linear Change (%)   CT-30 ℃*8h1250℃ -0.51400℃ -0.51500℃ -0.51550℃ -0.5
Cold Crushing Strength (Mpa)3.0-4.53.0-4.53.0-4.53.0-4.5
Modulus of Rupture (Mpa)
Thermal conductivity400℃(W/m.k)
Thermal Expansion1000℃(%)