Abstract
SiOC ceramic aerogels (SiOC CAs) were successfully fabricated through vacuum freeze-drying method combined with PDC process. The microstructure, phase composition and thermal conductivity of the as-prepared samples were systematically investigated. The results showed that the as-prepared SiOC CAs were composed of amorphous phase with three-dimensional network porous structure. In addition, the as-prepared SiOC CAs demonstrated high specific surface area of 635.72 m2/g, low density of 0.19 g/cm3, large pore volume of 0.49 cm3/g, and ultra-low thermal conductivity of 0.031 ± 0.0015 W/(m K). The present developed work provided a new thought to produce other porous Si-based ceramic aerogel materials.
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Acknowledgements
The authors would like to thank Jinghua Xu from Shiyanjia Lab (www.shiyanjia.com) for the XRD analysis.
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This work is supported by the National Outstanding Youth Science Fund Project of National Natural Science Foundation of China.
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DL: Performed the experiments; Analyzed and interpreted the data; Wrote the paper; YX: Contributed reagents, Supervision, Revised the paper.
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Liu, D., Xue, Y. Preparation and structure of silicon oxycarbide aerogels fabricated by polymer derived ceramics method. J Porous Mater 30, 881–887 (2023). https://doi.org/10.1007/s10934-022-01389-w
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DOI: https://doi.org/10.1007/s10934-022-01389-w