Here are the differences between calcium sulfate boards and MgO boards based on their composition, performance, applications, and cost:
I. Material Composition
Calcium Sulfate Board: Primarily made of calcium sulfate, either anhydrous or semi-hydrated, and formed through compression molding. It’s commonly used in high-strength flooring and decorative applications.
Magnesium Oxide Board: Composed mainly of magnesium oxide, usually reinforced with materials like magnesium chloride and fibers. It’s produced through a chemical reaction and curing process, making it suitable for a wide range of uses, including fireproofing and soundproofing.
II. Physical Performance
Strength: Magnesium oxide boards typically exhibit higher strength than calcium sulfate boards, especially in thicker panels. They’re also known for their flexibility and resilience, as they can bend under pressure without cracking, which makes them ideal for high-load and durable applications.
Fire Resistance: Both boards offer excellent fire resistance, but magnesium oxide boards excel in fire, moisture, and soundproofing. For this reason, they are widely used in residential and commercial buildings requiring fire-rated walls, doors, and ceilings.
Moisture Resistance: Magnesium oxide boards adapt well to humid environments, whereas calcium sulfate boards, though moisture-resistant, may be less durable in extremely damp conditions.
III. Application Areas
Calcium Sulfate Board: Primarily used in high-strength flooring systems and raised floors in equipment rooms, where moisture exposure is less frequent.
Magnesium Oxide Board: With broader applications, it can be used for walls, floors, ceilings, and fire doors, as well as in damp environments and highway tunnels. Magnesium oxide boards can also be combined with other materials (like sandwich panels and SIP panels) and serve as acoustic panels, making them suitable for eco-friendly construction projects.
IV. Environmental Impact
Magnesium oxide boards are made from natural minerals and do not require high-temperature firing, making them energy-efficient and environmentally friendly.
Calcium sulfate boards require a more complex production process, which makes them slightly less eco-friendly than magnesium oxide boards.
V. Cost
Calcium sulfate boards are typically more expensive due to the precision and physical compression molding involved in their production.
Magnesium oxide boards are more cost-effective, especially as China has abundant raw materials, offering a price advantage and great overall value.
VI. Summary
Magnesium oxide boards outperform calcium sulfate boards in terms of strength, flexibility, fire resistance, moisture resistance, and eco-friendliness. They also have a broader range of applications. Calcium sulfate boards, however, are well-suited for specific high-strength flooring systems. Ultimately, the choice depends on the project’s performance requirements and budget.
