Silicon Carbide Aerogel Felt

I. Core Parameters

1. Structural Parameters

2. Thermal Properties

●Thermal conductivity: ≤ 0.0221 W/(m·K) at room temperature, ≤ 0.030 W/(m·K) at high temperature (400℃);

●Temperature resistance limit:

●Inert atmosphere: 1300℃ (withstand for 2 hours);

●Oxidizing atmosphere: 1600℃ (instantaneous);

●Coefficient of thermal expansion: 2.77×10^-6K^-1 (well matched with metal matrix).  

3. Mechanical and Physical Properties

●Density: 0.025 g/cm³, adjustable according to compression ratio;

●Compressive strength: 1.365 MPa (3D printed enhanced type), Young's modulus 21.8 MPa;

●Flexibility: Bendable and foldable, tensile strength ≥ 100 kPa;

●Porosity: 90% - 99.8%, specific surface area 15 - 40 m²/g.  

II. Core Features

●Lightweight and High Strength: The interpenetrating network of nanofibers endows the material with high porosity (>98%) and mechanical stability, combining low density with compressive resistance.

●Integrated Functionality: Combining the typical characteristics of aerogels (such as sound insulation and corrosion resistance) with the inherent advantages of SiC ceramics (such as oxidation resistance and thermal shock resistance).

●Processability: The bulk form supports post-treatment such as cutting and coating, suitable for complex engineering scenarios.

●Multi-functionality

- Electromagnetic Wave Absorption: The one-dimensional nanowire structure optimizes radar wave absorption, suitable for military stealth coatings.

- Hydrophobic and Flame Retardant: Overall hydrophobic, with a flame retardancy rating of UL94-V0.  

III. Application Fields  

1. Aerospace and High-Temperature Equipment

●Spacecraft Thermal Protection: Used in the insulation layer of high-speed aircraft, it can withstand aerodynamic heating up to 1600℃.

●Aviation Engine: Turbine blade ablation-resistant coating, reducing weight by 30% and extending service life by three times.  

2. New Energy and Electric Vehicles

●Battery Thermal Insulation: Insert 1-3mm aerogel felt between battery cells to prevent thermal runaway spread (withstand 400℃);

●Fuel Cell Thermal Management: Insulation layer for hydrogen fuel cell stacks to reduce cold start energy consumption.  

3. Industrial Energy Conservation and Protection

●High-temperature pipelines/tanks: Replace traditional glass wool, reducing thickness by 60% (6mm aerogel blanket is equivalent to 30mm rock wool);

●Chemical reactors: Corrosion-resistant inner lining, resistant to strong acid environments.  

4. Emerging Fields

●Electronic Device Heat Dissipation: 5G base station power semiconductor packaging, thermal conductive fillers enhance heat dissipation efficiency;

●Special Clothing: Firefighter suit interlayer (≤ 450℃), delays heat transfer;

●Building Energy Conservation: Ultra-thin thermal insulation curtains (2mm thick, sound insulation 12dB).