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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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
Depositing User: Unnamed user with email storage.bpmlib@ums.edu.my
Date Deposited: 11 May 2016 05:48
Last Modified: 13 Oct 2017 06:37
URI: http://eprints.ums.edu.my/id/eprint/12627

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