Silicon Mullite Brick
Silicon Mullite Brick is a composite refractory brick made primarily from mullite, high-alumina raw materials and silicon carbide (SiC). It combines the high-temperature strength and stability of mullite and alumina with the excellent thermal shock resistance, wear resistance and corrosion resistance of silicon carbide. Silicon mullite brick is also commonly referred to as mullite silicon carbide brick or mullite-SiC brick.
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60-65
Al2O3% (≥)
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20–30
SiC% (≥)
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2.55-2.65
Bulk Density (g/cm³)
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75-90
Cold Crushing Strength (MPa)



What is Kerui Silicon Mullite Brick?
Kerui Silicon Mullite Brick, is a composite refractory brick comprised of 60%-68% Al2O3 and 28%-30% SiC. This composite refractory brick for sale is specially formulated to possess the advantageous properties of both alumina and silicon carbide. These two excellent materials make it highly suitable for a variety of refractory applications.
Physical and Chemical Index of Kerui Silicon Mullite Brick
To understand the suitability of Silicon Mullite Bricks, you can refer to the physical and chemical index below. Kindly specify the product you need, and Kerui will promptly respond to your inquiry.
| Item | GM1650 | GM1600 | GM1550 | |
|---|---|---|---|---|
| Al2O3, % | ≥ | 65 | 63 | 60 |
| Bulk Density, g/cm3 | ≥ | 2.65 | 2.60 | 2.55 |
| Apparent Porosity, % | ≤ | 17 | 17 | 19 |
| Cold Crushing Strength, MPa | ≥ | 85 | 90 | 90 |
| 0.2MPa Refractoriness Under Load, °C | ≥ | 1650 | 1600 | 1550 |
| Thermal Shock Resistances (1100°C, Water Cooling), Cycle | ≥ | 10 | 10 | 12 |
Advantages of Kerui Silicon Mullite Brick for Sale
Silicon mullite brick has excellent resistance to rapid temperature changes. The mullite structure provides good high-temperature stability, while silicon carbide helps improve resistance to thermal shock and reduce the risk of cracking and spalling.
This makes silicon mullite bricks suitable for kiln areas that experience frequent heating and cooling cycles. Compared with conventional high alumina refractory bricks, the mullite-SiC structure can provide better stability under severe thermal cycling conditions.
The silicon carbide component gives silicon mullite brick good resistance to abrasion and mechanical wear. This property is particularly important in areas where refractory linings are exposed to material flow, dust, particles or mechanical impact.
For applications with severe abrasion, the appropriate SiC-containing refractory grade should be selected according to the actual operating conditions. Silicon carbide bricks can also be considered when higher SiC content and stronger wear resistance are required.
Silicon mullite brick maintains good mechanical strength at elevated temperatures. Its mullite-based structure provides high-temperature stability, helping the refractory lining maintain its shape and resist deformation during long-term operation.
This makes it suitable for high-temperature zones of cement kilns, lime kilns, industrial furnaces and other thermal equipment where both temperature and mechanical loads need to be considered.
Silicon mullite bricks provide good resistance to various corrosive gases, dust and process materials encountered in industrial kilns. The combination of mullite and silicon carbide helps the brick maintain its structural integrity when exposed to demanding working environments.
For applications involving particularly aggressive slag or molten materials, other specialized refractory products, such as alumina silicon carbide bricks, may be selected according to the specific chemical conditions.
Applications of Silicon Mullite Brick
Silicon mullite bricks are widely used in high-temperature industrial kilns and furnaces where excellent thermal shock resistance, wear resistance, corrosion resistance, and high-temperature strength are required. The combination of mullite and silicon carbide gives these refractory bricks good resistance to thermal cycling and mechanical wear under demanding operating conditions.
Silicon mullite brick, also known as mullite silicon carbide brick or mullite-SiC brick, is suitable for various high-temperature applications, particularly in areas exposed to rapid temperature changes, abrasion, and chemical attack.
Silicon mullite bricks are used in cement rotary kilns, particularly in transition zones, cooling zones, kiln outlets, and other areas subject to high temperature, thermal shock, and mechanical wear. Their good wear resistance and thermal stability help maintain the integrity of the refractory lining during continuous kiln operation.
In lime kilns, silicon mullite bricks can be used in high-temperature and high-wear sections where the refractory lining is exposed to thermal cycling, abrasion, and alkaline materials. Their resistance to thermal shock helps reduce cracking and spalling during kiln operation.
Silicon mullite bricks are suitable for selected areas of metallurgical furnaces and other high-temperature equipment. They can withstand high temperatures and mechanical wear while providing good resistance to thermal shock.
Silicon mullite refractory bricks can be used in waste incinerators and thermal treatment equipment exposed to high temperatures, abrasion, and corrosive gases. Their combination of mullite and silicon carbide provides good resistance to thermal cycling and material erosion.
Silicon mullite bricks are also used in various industrial furnaces and kiln linings where high-temperature strength, thermal shock resistance, and wear resistance are required. The specific brick grade can be selected according to the operating temperature and working conditions.

Silicon Mullite Brick and Mullite Silicon Carbide Brick
Silicon mullite brick is a mullite-based refractory brick containing silicon carbide (SiC). In the refractory industry, Mullite Silicon Carbide Brick, Mullite-SiC Brick, and Silicon Mullite Brick may be used to describe similar mullite-SiC refractory products.
However, formulations can vary between manufacturers. The actual chemical composition, SiC content, bulk density, apparent porosity and cold crushing strength should therefore be confirmed according to the specific product grade.

Leading Silicon Mullite Brick Manufacturer – Kerui Refractory
Innovative R&D Ability
To maintain competitive edge, Kerui is dedicated to exploring new materials, formulations and manufacturing techniques. Thus, it improves the performance and durability of these high temp fire bricks. As a result. KERUI developes Silicon Mullite Bricks and many other composite bricks to improve your efficiency.
Responsible Service
From project consultation to after-sales service, Kerui offers responsible support. International business manager is ready to solve your problems at any time. Meanwhile, a professional after-sales team can guide the installation and maintenance of Silicon Mullite Bricks.
Efficient Production
A reasonable production process and intelligent equipment in Kerui are important to optimize production efficiency. The annual output of Kerui is 150,000 tons. Even if customers require a large scale of Silicon Mullite Bricks, Kerui can complete production and delivery in a short time.
Rich Project Experience
During the past 20 years, Kerui has been an experienced firebrick supplier. We have cooperated with more than 2,000 customers and various industries. Now, by drawing on extensive experience, Kerui ensures that customers receive reliable, high-performance Silicon Mullite Bricks that meet their unique project needs.
Kerui silicon mullite bricks combine excellent thermal shock resistance, wear resistance, high-temperature strength, and corrosion resistance for demanding kiln and furnace applications. As a professional refractory manufacturer in China, Kerui supplies silicon mullite refractory bricks in various sizes and grades to meet different operating conditions. If you are looking for high-quality silicon mullite bricks or mullite silicon carbide bricks, please contact Kerui for specifications and a competitive quotation.


