Mullite lightweight thermal insulation brick

Product ID: 7aa10
 
 
 
 
 

Kiln furniture large-sized lightweight mullite bricks are new type of mullite material formed by an advanced manufacturing process, which use of top-grade mullite grogs as raw materials, high quality alumina as additive to fit different use temperature.


The characteristics of this product include: high strength, low thermal conductivity, good heat preservation performance, small linear change on reheating, and excellent high temperature perfomance.


Large-sized lightweight mullite bricks can be used in a variety of industrial kiln: pottery kiln, metallurgy furnace, casting furnace.


The standard specifications is 230 x 114 x 64 mm. Custom-made order is also available to meet specific requirements.


Material Properties:

Type 1 Type 2 Type 3 Type 4 Type 5 Type 6
Al2O3 Content>=4545 54 54 65 65
SiO2 Content>=53 53 45 45 33 33
Fe2O3 Content>=1.0 1.0 0.8 0.8 0.7 0.7
Bulk Density (g/cm3) 0.60.8 0.8 1.0 0.8 1.0
Linear Reheating Shrinkage (%)<=0.6 in 24hrs @1230 0C <=0.5 in 24hrs @ 1230 0C<=0.4 in 24hrs @ 1400 0C <=0.4 in 24hrs @ 1400 0C<=0.5 in 24hrs @ 1500 0C <=0.5 in 24hrs @ 1500 0C

Compressive Mechanical Strength @ Tamb (MPa)

>=1.1>=2.1 >=2.0 >=3.2 >=3.2 >=4.8
Thermal Expansion coefficient @ 1000 0C (%)0.4 0.5 0.5 0.5 0.6 0.6
Thermal Conductivity Coefficient @ <350 0C (W/(m.K))0.2 0.24 0.25 0.320.28 0.36
Working Temperature (0C)1250 1250 1400 1400 1540 1540

 

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