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

被引：8

作者：

Sulistyo, Joko ^{[1
,2
]}

Hata, Toshimitsu ^{[1
]}

Kitagawa, Hiroyuki ^{[3
]}

Bronsveld, Paul ^{[4
]}

Fujisawa, Masashi ^{[5
]}

Hashimoto, Kozo ^{[6
]}

Imamura, Yuji ^{[1
]}

机构：

[1] Kyoto Univ, Lab Innovat Humanohabitabil, Res Inst Sustainable Humanosphere, Kyoto 6110011, Japan

[2] Gadjah Mada Univ, Dept Forest Prod Technol, Fac Forestry, Bulaksumur 55281, Yogyakarta, Indonesia

[3] Shimane Univ, Dept Mat Sci, Shimamoto, Osaka 6908504, Japan

[4] Univ Groningen, Dept Appl Phys, NL-9747 AG Groningen, Netherlands

[5] Akita Prefectural Univ, Inst Wood Technol, Akita 0160876, Japan

[6] Kyoto Univ, Lab Appl Radio Engn Humanosphere, Res Inst Sustainable Humanosphere, Kyoto 6110011, Japan

来源：

JOURNAL OF MATERIALS SCIENCE | 2010年 / 45卷 / 04期

关键词：

X-RAY-DIFFRACTION; SILICON-CARBIDE; MICROSTRUCTURE EVOLUTION; CERAMICS; MECHANISMS; CONVERSION; GRAPHITE; NANORODS; SIO2;

D O I：

10.1007/s10853-009-4053-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：1107 / 1116

页数：10

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