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JM28 Mullite Insulation Brick

Al2O3: 64-66%

Bulk Density: 0.8-1.0g/cm3

High porosity

Small volume density

High mechanical intensity

Small thermal conductivity

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JM28 mullite insulation brick is a lightweight insulation brick made of pure mullite as raw material, adding alumina powder according to different types and sintering at high temperature.

This lightweight mullite insulation brick has the advantages of stable volume, good thermal stability, high strength and low thermal conductivity. It is an ideal energy-saving product.


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

JM28 Mullite Insulation Brick Specification

JM28 Mullite Insulation BrickABC
Volume density (g/cm3)0.80.91
Reheating Linear Change 1500℃*12h %-1-0.8-0.7
Cold Compression Strength (Mpa)
Modulus of Rupture (Mpa)
Thermal Conductivity w/m·k0.280.320.34
Al2O3 (%)646566
SiO2 (%)333231
Fe2O3 (%)


  1. Glass industries iron & steel industries.
  2. Ceramics industries non-ferrous metals industries.
  3. Electrolytic Aluminum industries power generation industries.
  4. Heat surface fireproof lining other fire-proof back lining.


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