Electrical and thermal conductivities of porous SiC/SiO2/C composites with different morphology from carbonized wood

Joko Sulistyo, and Toshimitsu Hata, and Hiroyuki Kitagawa, and Paul Bronsveld, and Masashi Fujisawa , and Kozo Hashimoto, and Yuji Imamura, (2010) Electrical and thermal conductivities of porous SiC/SiO2/C composites with different morphology from carbonized wood. pp. 1107-1116. ISSN 0022-2461

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Official URL: http://dx.doi.org/10.1007/s10853-009-4053-z

Abstract

Porous SiC/SiO2/C composites exhibiting a wide range of high thermal and electrical conductivities were developed from carbonized wood infiltrated with SiO2. As a pre-treatment, the samples were either heated at 100 °C or kept at room temperature followed by sintering in the temperature range 1200–1800 °C. The microstructure, the morphology, and the electrical and thermal conductivities of the composites were investigated. Pre-treatment at room temperature followed by sintering up to 1800 °C produced composites exhibiting a greater size of carbon crystallites, a higher ordering of the microstructure of carbon and β-SiC and a smaller amount of SiO2, resulting in electrical and thermal conductivities of 1.17 × 104 Ω−1 m−1 and 25 W/mK, respectively. The thermal conductivity could be further improved to 101 W/mK by increasing the density of the composite to 1.82 g/cm3. In contrast, the pre-treatment at 100 °C produced composites possessing a lower thermal conductivity of 2 W/mK.

Item Type:Article
Uncontrolled Keywords:carbonized wood, thermal conductivities, temperature, carbon crystallites
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:FACULTY > Faculty of Food Science and Nutrition
ID Code:12627
Deposited By:IR Admin
Deposited On:11 May 2016 13:48
Last Modified:11 May 2016 13:48

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