Energy Citations Database
Bookmark and Share

Bibliographic Citation

 
Document
For copies of Journal Articles, please contact the Publisher or your local public or university library and refer to the information in the Resource Relation field.
For copies of other documents, please see the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or Document Availability.
Title Thermal-conductivity measurement of a two-dimensional anisotropic heat conductor using steady-state point heat source and sink
Creator/Author Nemoto, Eiji ; Kawashimo, Kensuke
Publication Date1995 Dec 31
OSTI IdentifierOSTI ID: 451990
Other Number(s)Journal ID: HTJPAU; ISSN 0096-0802; TRN: TRN: IM9715%%22
Resource TypeJournal Article
Resource RelationJournal Name: Heat Transfer - Japanese Research; Journal Volume: 24; Journal Issue: 6; Other Information: PBD: 1995
Subject36 MATERIALS SCIENCE; HIGH-TC SUPERCONDUCTORS; THERMAL CONDUCTIVITY; BARIUM OXIDES; COPPER OXIDES; YTTRIUM OXIDES; STEADY-STATE CONDITIONS; MEASURING METHODS
Description/AbstractA new measuring method for the principal thermal conductivities of a two-dimensional anisotropic heat conductor using a steady-state point heat source and sink is proposed here. The theory of this new thermal-conductivity measurement is based on a congruent matrix transformation from the nonuniform space of an anisotropic heat conductor to the uniform space of an isotropic one. Introduction of the hypothesis of symmetry in the heat conduction law leads to an equivalent relationship of the thermal conductivity tensor between an anisotropic space tensor {Lambda}{sub {mu}} and a uniform space tensor {Lambda}{sub {nu}}. This new measuring method can provide the two principal thermal conductivities {lambda}{sub 1,2} and the principal rotation angle {phi} from the temperature detecting axis. The temperature dependence of two principal thermal conductivities {lambda}{sub 1,2} and the principal rotation angle {phi} of Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}y} have been measured. Anomalies of the two principal thermal conductivities and the principal rotation angle are clearly observed at the superconductivity transition temperature {Tc}.
Country of PublicationUnited States
LanguageEnglish
FormatMedium: X; Size: pp. 491-503
System Entry Date2008 Feb 04

Top