Knowledge Forum

The fire resistance of magnesium oxide boards stems primarily from their inorganic base material properties—they are inherently Class A non-combustible materials. They do not burn or release toxic gases when exposed to fire, making them a commonly used fire-retardant building material in the construction industry.

The key factors supporting their fire resistance are as follows:

- Intrinsically Non-Combustible Base Material: Magnesium oxide boards use inorganic minerals (such as magnesium oxide and magnesium chloride) as their main raw materials. These components are naturally high-temperature resistant and non-combustible; they will not burn or melt in high-temperature environments, fundamentally preventing the spread of flames.

- Excellent Fire Resistance Rating: The fire resistance rating of ordinary magnesium oxide boards can reach 0.5 to 2 hours (with slight variations depending on thickness and formula). They maintain structural integrity under high temperatures and do not crack or collapse quickly, buying time for fire escape and firefighting.

- Smoke-Free and Non-Toxic Trait: They do not release toxic and harmful gases (like formaldehyde or carbon monoxide) during a fire—only a small amount of harmless water vapor may be produced. This effectively reduces secondary injuries from fires and meets the "green fire protection" requirements for fire safety.

- Fire and Heat Insulation Effect: The microporous structure inside the boards can slow down heat transfer. They can be used as core materials for components such as fire walls and fire-resistant ceilings, helping to block the spread of fire and high temperatures to other areas.

I can help you compile a comparison table of specific fire performance parameters of magnesium oxide boards in different construction scenarios (such as residential partition walls and commercial suspended ceilings), which will provide you with a more intuitive reference for their practical application effects. Do you need this?