TITLE

Strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples

AUTHOR(S)
Manohar, Srirang; Asokan, S.
PUB. DATE
January 2001
SOURCE
Applied Physics Letters;1/22/2001, Vol. 78 Issue 4, p469
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The strip inverse-configuration photopyroelectric technique to measure the thermal conductivity of bulk samples of metals, semiconductors, and insulators is presented. It utilizes a narrow (500 μm wide) strip of a 9 μm thick pyroelectric sensor in an inverse configuration. A mathematical model is outlined that yields an expression for the output voltage of the pyroelectric sensor following heat dissipation into the sample, in a frequency range where the proposed measurement is possible. Experimentally, the sensor was operated in an "isothermal-voltage" mode to identify the frequency regime within which the measurement of the thermal conductivity of representative samples was possible after suitable calibration of the system.
ACCESSION #
4710957

 

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