粉体および粉末冶金
Online ISSN : 1880-9014
Print ISSN : 0532-8799
ISSN-L : 0532-8799
メカニカルアロイングにより合成したp型Si80Ge20焼結体の熱電特性
新野 真紀子岡村 寛志朴 容浩宮島 雅史渡辺 龍三
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ジャーナル オープンアクセス

1998 年 45 巻 8 号 p. 733-737

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抄録
The key to improving the thermoelectric figure of merit of Si-Ge sytem is to reduce the thermal conductivity. Alloy powder with grain size of 20-30nm was prepared by mechanical alloying. The amounts of boron was varied to achieve optimum carrier concentration. The thermoelectric properties of the hot-pressed Si-Ge alloys were measured in the temperature range from 300 K to 1073 K.
The sintered Si-Ge compact was found to have a fine grain structure of about 200 nm. As a consequence, a reduction in thermal conductivity of up to 30% was achieved compared to conventional p-type alloy. A maximum figure of merit of 9×10-4K-1was obtained at 1073K.
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© 社団法人粉体粉末冶金協会

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