Kiln Furniture & Refractories

Mullite Stable Refractory


Mullite Stable Refractory

Mullite (3Al2O3-2SiO2) is a refractory material formed by bonding aluminum oxide (Al2O3) and silicon dioxide (SiO2) in a ratio of 3:2. It features exceptional thermal shock resistance and is ideal for use in kiln furniture used for ring of electronic ceramics.


  • Features superior thermal shock resistance and shape stability at high temperatures.
  • Reactivity with products can be reduced by means of an alumina or zirconia coating.

Product characteristics

Product codeMullron
MX-800 NF-1
Material Mullite
Chemical composition (%) Al2O3 71 83
SiO2 28 16
Physical properties Apparent porosity (%) 18.0 20.0
Apparent density 3.24 3.40
Bulk density 2.66 2.71
Strength (MPa) Room temperature bending strength 11 10
High temperature bending strength
9 8
Feature High strength
Spalling resistance
Reaction resistance
Application For plate, ferrite and ceramic capacitors for electronics industry

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