Aluminum foil ceramic fiber paper is a composite material designed for extreme high temperature environments. Its structure is divided into three layers:
1. Ceramic fiber substrate layer:
Raw materials: Alumina (Al₂O₃) and silica (SiO₂) are the main components (usually in a ratio of 40:60), with a small amount of boric acid added as a binder.
Process: Ultrafine fibers (diameter 3-5μm) are formed by melt blowing, and then pressed into a uniform thin layer by wet molding process.
2. Aluminum foil reflective layer:
Material: High-purity aluminum foil (purity ≥99.5%), thickness 0.05-0.1mm, anodized to improve oxidation resistance.
Composite technology: A high-temperature hot pressing process is used to combine the aluminum foil and the ceramic fiber layer to ensure that the interface bonding strength is ≥2MPa.
3. Key features:
Temperature resistance limit: Long-term resistance to 1000℃, short-term (≤2 hours) resistance to 1300℃ flame impact.
Density control: Through the optimization of fiber distribution, the density is controlled at 180-250kg/m³, achieving a balance between lightness and strength.
