Mullite Brick Mullite Brick

Mullite Brick

Al2o3: ≥72%
Fe2o3: ≤0.8%
Bulk density : ≥2.55g/cm3
Apparent porosity : ≤17%
Cold crushing strength: ≥80Mpa
Thermal shock resistance: Excellent

Mullite brick: 

Mullite bricks are high-alumina refractories with mullite (3Al2O3·2SiO2) as the main crystal phase. Generally, the alumina content is between 70% and 80%. Mullite Refractory bricks have high refractoriness, which can reach above 1790℃. The starting temperature of load softening is 16001700℃. It has the good thermal shock resistance with cold crushing strength of 70260MPa. There are two types of mullite refractories: sintered mullite bricks and fused mullite bricks. If the Al2O3 content in refractory brick is more than 80%, we call it as corundum mullite brick. If there is ZrO2 in the brick, we call it as Zircon Mullite Brick.
As a professional mullite bricks manufacturer, we have exported different mullite refractory bricks to more than 30 countries. Please kindly read the following more information and make Inquiry.

Scope of application:

Mullite bricks are widely used in glass furnaces,hot blast stove and etc


Low thermal expansion rate

Strong resistance to corrosion by metallurgical slag and various glass liquids

High temperature wear resistance

High temperature thermal stability, anti-corrosion of glass liquid

Long service lifetime

Technical Data:


Mullite brick M72

Mullite brick M78

Mullite brick M80

Al2o3  %




Fe2o3   %




Bulk density g/cm3




Apparent porosity %




Cold crushing strength   mpa




Thermal shock resistance



Very good

Softening under load




Thermal expansion %




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