Heat transfer and thermoelectric voltage at metallic point contacts

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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationHeat Transfer on the Microscale
PublisherPubl by ASME
Pages63-69
Number of pages7
Volume200
ISBN (Print)0791809269
Publication statusPublished - 1992
Externally publishedYes
Event28th National Heat Transfer Conference and Exhibition - San Diego, CA, USA
Duration: Aug 9 1992Aug 12 1992

Other

Other28th National Heat Transfer Conference and Exhibition
CitySan Diego, CA, USA
Period8/9/928/12/92

Fingerprint

Point contacts
Heat transfer
Electric potential
Dissimilar metals
Acoustic impedance
Temperature sensors
Heat resistance
Contacts (fluid mechanics)
Temperature
Electric properties
Metals
Electrons

All Science Journal Classification (ASJC) codes

  • Fluid Flow and Transfer Processes
  • Mechanical Engineering

Cite this

Phelan, P. E., Nakabeppu, O., Ito, K., Hijikata, K., Ohmori, T., & Torikoshi, K. (1992). Heat transfer and thermoelectric voltage at metallic point contacts. In Heat Transfer on the Microscale (Vol. 200, pp. 63-69). Publ by ASME.

Heat transfer and thermoelectric voltage at metallic point contacts. / Phelan, Patrick E.; Nakabeppu, O.; Ito, Kohei; Hijikata, Kunio; Ohmori, T.; Torikoshi, K.

Heat Transfer on the Microscale. Vol. 200 Publ by ASME, 1992. p. 63-69.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Phelan, PE, Nakabeppu, O, Ito, K, Hijikata, K, Ohmori, T & Torikoshi, K 1992, Heat transfer and thermoelectric voltage at metallic point contacts. in Heat Transfer on the Microscale. vol. 200, Publ by ASME, pp. 63-69, 28th National Heat Transfer Conference and Exhibition, San Diego, CA, USA, 8/9/92.
Phelan PE, Nakabeppu O, Ito K, Hijikata K, Ohmori T, Torikoshi K. Heat transfer and thermoelectric voltage at metallic point contacts. In Heat Transfer on the Microscale. Vol. 200. Publ by ASME. 1992. p. 63-69
Phelan, Patrick E. ; Nakabeppu, O. ; Ito, Kohei ; Hijikata, Kunio ; Ohmori, T. ; Torikoshi, K. / Heat transfer and thermoelectric voltage at metallic point contacts. Heat Transfer on the Microscale. Vol. 200 Publ by ASME, 1992. pp. 63-69
@inproceedings{4bd73658ca2b43ac84c61b9b3ee76239,
title = "Heat transfer and thermoelectric voltage at metallic point contacts",
abstract = "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.",
author = "Phelan, {Patrick E.} and O. Nakabeppu and Kohei Ito and Kunio Hijikata and T. Ohmori and K. Torikoshi",
year = "1992",
language = "English",
isbn = "0791809269",
volume = "200",
pages = "63--69",
booktitle = "Heat Transfer on the Microscale",
publisher = "Publ by ASME",

}

TY - GEN

T1 - Heat transfer and thermoelectric voltage at metallic point contacts

AU - Phelan, Patrick E.

AU - Nakabeppu, O.

AU - Ito, Kohei

AU - Hijikata, Kunio

AU - Ohmori, T.

AU - Torikoshi, K.

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0027072945&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027072945&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0027072945

SN - 0791809269

VL - 200

SP - 63

EP - 69

BT - Heat Transfer on the Microscale

PB - Publ by ASME

ER -