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- POLYCRYSTALLINE ALUMINA FIBER |
- Polycrystalline Alumina Fiber Board
Polycrystalline Alumina Fiber Board
Polycrystalline alumina fiber board is a premium-grade inorganic insulation material made primarily from high-purity alumina (Al?O?). Manufactured through a controlled molding and curing process, the board structure delivers exceptional thermal stability, mechanical strength, and chemical resistance. Designed for use in extreme-temperature environments, it serves dual functions as a structural component and thermal insulator across various high-temperature industries.
Key Features
Exceptional High-Temperature Resistance
Designed for continuous operation between 1000°C and 1600°C, withstanding short-term exposure to temperatures exceeding 1800°C, depending on alumina content. Ideal for use in open flames, molten metal environments, and other high-heat conditions.
High Strength and Structural Integrity
Unlike traditional fiber blankets, this board features increased density and compressive strength through precise pressing and curing. It resists mechanical shock, air erosion, and deformation, enabling direct load-bearing use.
Superior Thermal Insulation
With thermal conductivity as low as 0.04–0.12 W/(m·K) at room temperature, the board’s micro-porous fiber matrix minimizes heat loss and significantly improves energy efficiency in industrial systems.
Outstanding Chemical and Oxidation Resistance
The board offers strong resistance to acids, alkalis, oxidation, and high-temperature flue gases, maintaining stability even when in contact with molten metals or aggressive chemical atmospheres.
Lightweight and Easy to Fabricate
With a density range of 0.3–1.0 g/cm³, it is much lighter than traditional refractory materials. It can be easily cut, machined, or assembled onsite, reducing installation time and cost.
Environmentally Friendly & Non-Hazardous
Free from asbestos or hazardous binders, the board is non-toxic, non-combustible, and safe for personnel handling and long-term application.
Applications
Metallurgical Industry
Used in converter linings, electric arc furnaces, slag baffles, and continuous casting mold insulation, it provides reliable protection against molten metal impact while minimizing heat loss.
High-Temperature Kilns
Suitable for furnace roofs, walls, and doors in ceramic, glass, and sintering kilns. It supports the kiln structure while enhancing thermal insulation and extending equipment lifespan.
Energy and Chemical Processing
Ideal for cracking furnaces, reactors, boilers, and gas turbines, offering durable insulation in chemically aggressive, high-temperature environments.
Aerospace and Defense
Utilized as thermal barriers in rocket engine combustion chambers, missile components, and high-temperature testing enclosures, where it withstands rapid temperature cycling and mechanical load.
