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Magnesium aluminum silicate board, also known as magnesium aluminum silicate composite board, is a type of composite material used in various industrial and construction applications. It combines the properties of magnesium oxide (MgO), aluminum oxide (Al2O3), and silica (SiO2) to create a durable and versatile board. Here are some key points about magnesium aluminum silicate boards:

  • Composition: Magnesium aluminum silicate boards are typically composed of magnesium oxide, aluminum oxide, silica, and other additives such as fibers, binders, and fillers. The exact composition can vary depending on the manufacturer and specific product requirements.

  • Properties: These boards exhibit a range of desirable properties, including high fire resistance, excellent thermal insulation, low thermal conductivity, good mechanical strength, and resistance to moisture, chemicals, and pests. They are also lightweight compared to traditional building materials like concrete or brick.

  • Applications: Magnesium aluminum silicate boards find applications in various industries and construction projects, including:

    • Building construction: They are used for fireproofing walls, ceilings, and floors in commercial and residential buildings. They can also be used as cladding material for facades and exterior walls.
    • Industrial applications: These boards are used in industrial settings for thermal insulation, fire protection, and acoustic insulation in equipment, machinery, and structures.
    • HVAC systems: They are suitable for insulating HVAC ducts, pipes, and equipment due to their thermal insulation properties.
    • Marine and offshore structures: The boards are used in marine and offshore applications where fire resistance and durability are crucial.
    • Transportation: They can be used in vehicles and transportation infrastructure for fire protection and insulation purposes.
  • Installation: Magnesium aluminum silicate boards can be installed using mechanical fasteners, adhesives, or a combination of both. They are easy to cut and shape on-site to fit specific dimensions and design requirements.

  • Advantages: The key advantages of magnesium aluminum silicate boards include their high fire resistance, excellent thermal insulation properties, durability, low maintenance requirements, lightweight nature, and versatility in various applications.

  • Safety: While magnesium aluminum silicate boards are generally safe and non-toxic, proper handling and installation practices should be followed to minimize any potential health risks, such as exposure to airborne particles during cutting or installation.

Overall, magnesium aluminum silicate boards are valuable construction materials known for their fire resistance, thermal insulation, and durability, making them suitable for a wide range of applications across different industries.


Quality HDAlSi 1000
Classification temperatureºC1100
Bulk densitykg/m31000
Cold compressive strengthMPa10
Bending strengthMPa8
Shrinkage after 24 hºC %< 2 at 1000
Thermal conductivity  
200 ºCW/(m K)0.1
400 ºCW/(m K)0.12
600 ºCW/(m K)0.16
800 ºCW/(m K)0.2
Chemical analysis  
CaO + MgO%20 - 25
SiO2%45 - 55
Al2O3%16 - 20

Magnesium Aluminum Silicate Board

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