Core Composition and Manufacturing Process of Aluminum Foil Ceramic Fiber Paper

Aluminum foil ceramic fiber paper is a composite material specially designed for extreme high-temperature environments, structured in three layers:

1. Ceramic Fiber Substrate Layer:

• Raw Materials: Mainly composed of alumina (Al₂O₃) and silica (SiO₂) in a typical ratio of 40:60, with a small amount of boric acid as a binder.
• Process: Ultrafine fibers (diameter 3–5 μm) are formed via the melt-blown method, then pressed into uniform thin sheets using a wet forming process.

2. Aluminum Foil Reflective Layer:

• Material: High-purity aluminum foil (≥99.5% purity) with a thickness of 0.05–0.1 mm, anodized to improve oxidation resistance.
• Composite Technology: The aluminum foil is bonded to the ceramic fiber layer using high-temperature hot pressing, ensuring an interface bonding strength ≥2 MPa.

3. Key Features:

• Temperature Resistance: Long-term service up to 1000℃; short-term exposure (≤2 hours) can withstand flame impact up to 1300℃.
• Density Control: Fiber distribution is optimized to maintain a density of 180–250 kg/m³, balancing lightweight design with mechanical strength.