2010年2月
Electrical and thermal conductivities of porous SiC/SiO2/C composites with different morphology from carbonized wood
JOURNAL OF MATERIALS SCIENCE
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- 巻
- 45
- 号
- 4
- 開始ページ
- 1107
- 終了ページ
- 1116
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1007/s10853-009-4053-z
- 出版者・発行元
- SPRINGER
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 A degrees C or kept at room temperature followed by sintering in the temperature range 1200-1800 A degrees 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 A degrees C produced composites exhibiting a greater size of carbon crystallites, a higher ordering of the microstructure of carbon and beta-SiC and a smaller amount of SiO2, resulting in electrical and thermal conductivities of 1.17 x 10(4) Omega(-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/cm(3). In contrast, the pre-treatment at 100 A degrees C produced composites possessing a lower thermal conductivity of 2 W/mK.
- リンク情報
- ID情報
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- DOI : 10.1007/s10853-009-4053-z
- ISSN : 0022-2461
- Web of Science ID : WOS:000273033800033