The Properties of Corundum Bricks

Corundum bricks are widely recognized for their exceptional refractory properties and suitability for high-temperature applications. Composed primarily of alumina (Al2O3), these bricks exhibit remarkable resistance to heat, chemical corrosion, and mechanical stress. In this article, we will delve into the properties of corundum bricks, highlighting their unique characteristics that make them a preferred choice for demanding industrial environments.


High Temperature Resistance

One of the key properties of corundum bricks is their remarkable resistance to high temperatures. Corundum, a crystalline form of alumina, has an extremely high melting point of approximately 2050°C (3722°F). This exceptional thermal stability allows corundum bricks to withstand intense heat without significant deformation or structural degradation. They are commonly used in applications such as kiln linings, furnaces, and other high-temperature areas where thermal insulation and resistance are paramount.

Excellent Chemical Stability

Corundum bricks exhibit excellent chemical stability, making them highly resistant to chemical attack and corrosion from acids, alkalis, and other aggressive substances. The high alumina content in corundum bricks provides a protective barrier against chemical reactions, ensuring the integrity and longevity of the brick structure. This property makes corundum bricks suitable for applications involving acidic or alkaline environments, such as chemical reactors, incinerators, and metal refining processes.

Low Thermal Conductivity

Corundum bricks possess low thermal conductivity, which is crucial for effective heat insulation and energy conservation. Their dense and tightly packed structure minimizes heat transfer through the bricks, allowing for efficient heat containment within the protected area. The low thermal conductivity of corundum bricks contributes to reduced energy consumption, improved thermal efficiency, and enhanced temperature uniformity in high-temperature applications. We also produce azs refractory.


High Mechanical Strength

Despite their excellent thermal insulation properties, corundum bricks also exhibit high mechanical strength and resistance to mechanical stress. This property enables them to withstand the physical demands of industrial processes, including thermal cycling, mechanical load, and abrasion. Corundum bricks maintain their structural integrity even under extreme conditions, ensuring long-lasting and reliable performance in harsh industrial environments.

Abrasion Resistance

Corundum bricks are known for their exceptional resistance to abrasion and erosion. The dense and homogeneous structure of corundum, combined with its high hardness, allows the bricks to withstand the impact and friction generated by solid particles or aggressive gases. This property makes corundum bricks suitable for applications involving high-velocity gas flows, abrasive materials, and environments with particle-laden atmospheres. You can also click on this link to learn about other refractory products:

Dimensional Stability

Corundum bricks exhibit excellent dimensional stability, even when exposed to rapid temperature changes. They have minimal thermal expansion, which reduces the risk of cracking or spalling during thermal cycling. This property ensures that corundum bricks maintain their shape and structural integrity over prolonged use, contributing to their reliability and longevity in high-temperature applications.

KERUI Corundum Bricks


The properties of refractory material, including high-temperature resistance, chemical stability, low thermal conductivity, high mechanical strength, abrasion resistance, and dimensional stability, make them an ideal choice for demanding refractory applications. These bricks provide effective thermal insulation, protect against chemical corrosion, and withstand mechanical stress, ensuring optimal performance and durability in various industrial settings. By understanding the unique properties of corundum bricks, industries can confidently select and utilize this high-performing refractory solution to meet their specific high-temperature requirements.