An apparatus for the measurement of thermal diffusivity and electrical resistivity at elevated temperatures on a single sample

U. Even, G. Erez

Research output: Contribution to journalArticlepeer-review

Abstract

An apparatus for measuring the thermal diffusivity, electrical resistivity and heat capacity of metals is described. All measurements are performed on the same cylindrical sample, which is kept in high vacuum and externally heated to the desired temperature (100-900°C). Thermal diffusivity is determined from the phase relation of a propagating heat wave created at the ends of the sample by two miniature furnaces. Heat capacity is determined from the rate of temperature rise while the sample is ohmically heated. Electrical resistivity is determined from the voltage drop along the sample, produced by known direct current. The measurements yield accurate values for the determination of the Wiedemann-Franz ratio.

Original languageEnglish
Article number309
Pages (from-to)917-920
Number of pages4
JournalJournal of Scientific Instruments
Volume43
Issue number12
DOIs
StatePublished - 1966
Externally publishedYes

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