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Carbon-fiber felt reinforced carbon/alumina aerogel composite fabricated with high strength and low thermal conductivity

  • Original Paper: Nano-structured materials (particles, fibers, colloids, composites, etc.)
  • Published:
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Abstract

The objective of this research was to develop a high-strength carbon-fiber felt reinforced carbon/alumina aerogel (CF-C/Al2O3) with low thermal conductivity. The carbon-fiber felt reinforced resorcinol formaldehyde/alumina aerogel (CF-RF/Al2O3) was initially prepared using sol­gel technique followed by ambient pressure drying technique. The CF-C/Al2O3 was obtained after the thermal treatment at 1600 °C under flowing argon atmosphere. Both CF-RF/Al2O3 and CF-C/Al2O3 displayed extremely little linear shrinkages due to the high structural strength of carbon fiber felt. The compression strength of CF-C/Al2O3 were 0.50, 0.78, 1.30 and 2.35 MPa, the corresponding compressive stress at the strains of Ɛ 20%, Ɛ 30%, Ɛ 40% and Ɛ 50%, respectively. The thermal conductivity of CF-C/Al2O3 is as low as 0.284 W/(m·K) at a ultrahigh temperature 1600 °C under argon, which is only about one half of the value of carbon fiber felt (0.538 W/(m·K)). The as-synthesized CF-C/Al2O3 possessed greatly controllable and stable structure, which would be fabricated and machined to a large-scale composites and be used as high temperature thermal insulators.

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Acknowledgements

The authors acknowledge the supports from the National Natural Science Foundation of China (51702156 and 51602151), the Priority Academic Program Development of Jiangsu Higher Education Institution (PAPD)—China, the Natural Science Foundation of Jiangsu Province—China (BK20161002 and BK20161003), the Scientific and Technologic Start-ups Incubation Program—Entrepreneurship Competition Winning Project (BC2016036), and Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Nanjing Tech University, Nanjing, 210009, China

    Ya Zhong

  2. Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University, Nanjing, 210009, China

    Ya Zhong, Junjun Zhang, Xiaodong Wu, Xiaodong Shen, Sheng Cui & Chunhua Lu

  3. Suqian Anjiao Technology Co., LTD, Suqian, 223800, China

    Ya Zhong

  4. State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing, 210009, China

    Xiaodong Shen, Sheng Cui & Chunhua Lu

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  1. Ya Zhong
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  2. Junjun Zhang
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  3. Xiaodong Wu
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  4. Xiaodong Shen
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  5. Sheng Cui
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  6. Chunhua Lu
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Correspondence to Ya Zhong or Xiaodong Shen.

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Zhong, Y., Zhang, J., Wu, X. et al. Carbon-fiber felt reinforced carbon/alumina aerogel composite fabricated with high strength and low thermal conductivity. J Sol-Gel Sci Technol 84, 129–134 (2017). https://doi.org/10.1007/s10971-017-4485-x

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  • DOI: https://doi.org/10.1007/s10971-017-4485-x

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