A high-temperature-resistant SiO2-based aerogel composite and a preparation method thereof
By introducing high-silica fiber cloth and radiation-resistant agent into SiO2 aerogel and combining it with a specific drying method, the problems of structural collapse and decreased thermal insulation performance of SiO2 aerogel at high temperatures were solved, and an aerogel composite material with excellent compressive strength and thermal insulation performance was prepared, which is suitable for high-temperature thermal protection.
Patent Information
- Application Number
- CN202610627546.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-05-08
- Publication Date
- 2026-07-17
AI Technical Summary
Traditional SiO2 aerogels are prone to collapse, a sharp drop in specific surface area, a surge in thermal conductivity, and brittle fracture under high-temperature conditions. Furthermore, it is difficult to achieve uniform dispersion and stable bonding of radiation-resistant agents in aerogel materials, which limits their improvement in high-temperature insulation and mechanical properties.
Using high-silica fiber cloth as fiber reinforcement, and introducing radiation-resistant agents such as indium tin oxide, TiO2, ZrO2 or SiC, and by combining the precursor tetraethyl orthosilicate and Si40, combined with vacuum drying and supercritical drying methods, a SiO2-based aerogel composite material with compressive strength and high-temperature thermal insulation properties was prepared.
It achieves improved structural stability and thermal insulation performance of aerogel at high temperatures, with excellent compressive strength and low thermal conductivity, making it suitable for high-temperature thermal protection applications.
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