Heat transfer and thermoelectric voltage at metallic point contacts

Patrick E. Phelan, O. Nakabeppu, K. Ito, Kunio Hijikata, T. Ohmori, K. Torikoshi

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

Metallic point contacts have been extensively studied from the viewpoint of their interesting, and often nonlinear, electrical properties. Their thermal characteristics, however, have largely been ignored, even though they show great potential as microscale temperature sensors. It has been previously demonstrated that when a temperature drop exists across a point contact consisting of two identical metals, a thermoelectric voltage can be generated, provided the mean contact radius is comparable in size to the electron mean free path. In the present experimental study, a point contact is formed by pressing a sharply etched Ag whisker against either a Ag or a Cu flat plate. In addition to confirming the previous results, the feasibility of using such a point contact is demonstrated by calibrating the voltage output against the nondimensionalized plate temperature. Furthermore, the thermoelectric voltage at a Ag-Cu point contact is also presented, showing that a point contact made from dissimilar metals is even more promising than one made from identical materials. Finally, the point-contact thermal resistance is demonstrated to depend nonlinearly on the electrical resistance, or contact area, and on the temperature drop.

本文言語英語
ホスト出版物のタイトルHeat Transfer on the Microscale
出版社Publ by ASME
ページ63-69
ページ数7
ISBN(印刷版)0791809269
出版ステータス出版済み - 12 1 1992
外部発表はい
イベント28th National Heat Transfer Conference and Exhibition - San Diego, CA, USA
継続期間: 8 9 19928 12 1992

出版物シリーズ

名前American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
200
ISSN(印刷版)0272-5673

その他

その他28th National Heat Transfer Conference and Exhibition
CitySan Diego, CA, USA
Period8/9/928/12/92

All Science Journal Classification (ASJC) codes

  • 機械工学
  • 流体および伝熱

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