期刊
JOURNAL OF POROUS MATERIALS
卷 26, 期 5, 页码 1305-1312出版社
SPRINGER
DOI: 10.1007/s10934-019-00732-y
关键词
Carbon foam; SiO2 aerogel; Composite; Thermal conductivity
资金
- National Natural Science Foundation of China [51772151]
- Jiangsu RD project [BE2017054]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
In this study, carbon foam (CF) and SiO2 aerogel composite were prepared by the sol-gel method under a circumstance of the atmospheric drying process. The Pyrolysis mechanism of carbon foam was investigated through thermal gravimetric analysis and Fourier transform infrared spectroscopy (FTIR). Carbon foam having ultralight properties with a density of 5.44 kg/m(3), functions as a skeleton to support the composite. The maximum compressive stress measured for CF/SiO2 aerogel composite was about 1.0 MPa. At room temperature, the measured thermal conductivities of the CF and CF/SiO2 aerogel composite were 0.035 W/m K and 0.024 W/m K, while at 300 degrees C, it was reported to be 0.120 W/m K and 0.057 W/m K. Aerogel filled in carbon foam cells have significantly reduced the gaseous thermal conductivity of the prepared composite.
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