Al₂O₃ fiber aerogel

Lightweight, flexible, heat-resistant

Prepared via needleless electrospinning, combining ultra-low density with effective thermal insulation for flexible high-temperature applications.

Xuehua, Cao · Liping, Chen · Huaqiu, Sun · Fengliang, Liao · Sun, Runjun · Wei, Liang

Chemical Engineering Journal 2026

Specifications

Bulk density

{'zh': '27', 'en': '27'} mg/cm³

Thermal conductivity

{'zh': '0.0386', 'en': '0.0386'} W/(m·K)

Surface temperature (350 °C hot stage)

{'zh': '130–150', 'en': '130–150'} °C

Advantages

Lightweight and flexible

The aerogel has a bulk density of only 27 mg/cm³ and is flexible yet high-temperature resistant, enabling conformable insulation where sol-gel aerogels would crack.

Excellent thermal insulation

Thermal conductivity is only 0.0386 W/(m·K) after 700 °C calcination; on a 350 °C hot stage the surface stays at 130–150 °C, showing strong heat blocking.

Wide-width scalable production

A linear narrow-slit needleless spinneret enables efficient fabrication of wide-width fiber membranes, overcoming the low productivity of single-needle electrospinning.

Applications

• High-temperature thermal insulation：Used as insulation layers for high-temperature equipment, replacing brittle sol-gel aerogels.
• Aerospace insulation：Lightweight and flexible, suitable for spacecraft thermal protection, reducing weight and allowing conformal installation.
• Ceramic insulation materials：As a ceramic insulation material, it combines high temperature resistance with low thermal conductivity.
• Flexible thermal protection：It can bend to fit irregular surfaces, serving as flexible thermal protection components.
• High-temperature composites：It can act as a thermally insulating filler in high-temperature composites.