October 29, 2025
Calcium silicate board is a rigid, high-temperature insulation material made from silica powder, lime, and reinforcing fibers. Designed for superior mechanical strength and thermal stability, calcium silicate board is widely used across industries that require durable, non-combustible insulation solutions. Its combination of lightweight structure, precise dimensional stability, and excellent resistance to heat and moisture makes it an essential material in both industrial and construction applications.
In thermal engineering, calcium silicate board acts as a reliable back-up insulation behind refractory linings in furnaces, kilns, and boilers. It prevents heat loss, maintains stable operating temperatures, and protects outer casings from overheating. Even under continuous exposure to temperatures between 650 °C and 1100 °C, calcium silicate board retains its shape and compressive strength, unlike fiber materials that tend to shrink or degrade. This dimensional integrity ensures consistent insulation performance and minimizes maintenance costs over long service periods.
One of the most valued characteristics of calcium silicate board is its low thermal conductivity. The micro-porous structure effectively blocks heat transfer, enabling energy-efficient designs in power generation plants, petrochemical facilities, and steel processing systems. Additionally, its resistance to vibration and mechanical stress allows calcium silicate board to perform reliably in dynamic environments where equipment undergoes frequent thermal cycling.
Beyond heavy industry, calcium silicate board plays a critical role in building and architectural applications. It is used for fireproof partitions, ceilings, wall panels, and duct insulation, providing superior safety and stability in high-rise and commercial structures. Unlike gypsum boards, calcium silicate board does not warp or swell when exposed to humidity, making it suitable for kitchens, tunnels, and marine structures where moisture resistance is essential.
The chemical stability of calcium silicate board makes it compatible with most refractory coatings and adhesives. It does not release harmful gases or smoke during heating, ensuring a safe and environmentally friendly insulation solution. When combined with other refractory components, it enhances overall thermal efficiency and extends the lifespan of the entire lining system.
Modern manufacturing technology allows calcium silicate board to be produced in different densities and grades to meet specific industrial needs. High-density boards provide improved strength for structural applications, while low-density types offer better thermal insulation for lightweight assemblies. Each type maintains excellent machinability — calcium silicate board can be easily cut, drilled, or shaped into custom forms without cracking, making installation fast and efficient.
Whether used in a high-temperature furnace or as a structural fire barrier, calcium silicate board combines mechanical reliability, thermal performance, and safety. Its proven durability and versatility have made it one of the most trusted refractory insulation materials in the world. For engineers and project designers seeking long-term efficiency and protection, calcium silicate board delivers dependable performance under even the most demanding conditions.
