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Published on: February 28, 2014
SiO2/SiC Composite Aerogels: Controlled Fabrication, Structure-Property Relationships, and Multifunctional
Fei Li1,2, Xiaoli Bao2,3, Guangliang Yan2,3
1School of Metallurgy and Environment, Lanzhou University of Technology, Lanzhou, China.
None:
SiO2/SiC composite aerogels are a novel multifunctional nanoporous material that combine the excellent thermal insulation properties, high porosity, and low density of SiO2 aerogels with the superior mechanical properties and high-temperature stability of SiC. This effectively overcome the limitations of traditional SiO2 aerogels, such as brittleness and structural collapse at elevated temperatures. This paper systematically reviews preparation strategies for SiO2/SiC composite aerogels, including sol-gel, carbothermic reduction, cryogenic casting, chemical vapor deposition, and electrospinning techniques. It analyzes the effects of different methods on the material's microstructure, mechanical properties, thermal properties, and microwave absorption characteristics, and explores the broad applications of SiO2/SiC composite aerogels in high-temperature thermal insulation, electromagnetic wave absorption, catalyst supports, and adsorption separation. Finally, challenges and future research directions for SiO2/SiC composite aerogels are evaluated to advance their engineering applications.
