期刊
CERAMICS INTERNATIONAL
卷 44, 期 3, 页码 3484-3487出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.11.064
关键词
Carbon; Aerogel; Microstructure; Thermal properties
资金
- National Natural Science Foundation of China [11602125, 90816019, 91016021, 11227801]
- China Postdoctoral Science Foundation [2016M591168, 2017T100068, 2016M591085]
- National Basic Research Program of China [G2010CB832701]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [11521202]
To improve the thermal insulation and mechanical properties of lightweight carbon-bonded carbon fiber composites (CBCF), a porous CBCF decorated with nano SiO2-Al2O3 aerogel was prepared by sol-gel impregnation. Results showed that the nano aerogel were uniformly assembled within the pores in the CBCF framework. The aerogel played a significant role on reducing the thermal conductivity of CBCF, which could be mainly ascribed to reduced radiation and gas thermal conductivity of CBCF. Moreover, the aerogel in the CBCF pores hindered the bending fracture or elastic bending/rotation of the fibers and enhanced the mechanical properties of the composites.
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