Research Progress on High-temperature-resistant Al2O3-SiO2 Aerogel Thermal Insulation Materials

ZHAO Kongli; DONG Lingshu; ZHANG Liwen; PENG Xing; TANG Jingjing; WANG Xuan; SUN Caiyun; WU Daoxun

doi:10.7643/ issn.1672-9242.2026.05.009

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (5) : 73-84. DOI: 10.7643/ issn.1672-9242.2026.05.009

Aviation and Aerospace Equipment

Research Progress on High-temperature-resistant Al₂O₃-SiO₂Aerogel Thermal Insulation Materials

ZHAO Kongli¹, DONG Lingshu¹, ZHANG Liwen², PENG Xing¹, TANG Jingjing¹, WANG Xuan¹, SUN Caiyun^1,*, WU Daoxun¹

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Abstract

This paper reviews the preparation processes, high-temperature resistance, and the latest research progress on high-temperature infrared modification of Al₂O₃-SiO₂ aerogel thermal insulation materials. Researchers, based on the high-temperature phase transition behavior of Al₂O₃-SiO₂ aerogels, have proposed strategies to enhance temperature resistance by increasing the crystallinity of the nanoscale skeleton and introducing elemental doping, and further carried out IR-opacified modification to improve the suppression of infrared radiative heat transfer at high temperature. Moreover, from the perspective of practical applications, this paper also presents prospects for future research directions of Al₂O₃-SiO₂ aerogel thermal insulation materials.

Key words

Al₂O₃-SiO₂ aerogel / sol-gel process / high-temperature resistance / α-Al₂O₃ phase transition / IR-opacified / elemental doping / thermal insulation material

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ZHAO Kongli, DONG Lingshu, ZHANG Liwen, PENG Xing, TANG Jingjing, WANG Xuan, SUN Caiyun, WU Daoxun. Research Progress on High-temperature-resistant Al₂O₃-SiO₂Aerogel Thermal Insulation Materials[J]. Equipment Environmental Engineering. 2026, 23(5): 73-84 https://doi.org/10.7643/ issn.1672-9242.2026.05.009

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