Measurement of thermal conductivity in diamond films using a simple scanning thermocouple technique

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Author(s)

Detail(s)

Original languageEnglish
Pages (from-to)1312-1319
Journal / PublicationDiamond and Related Materials
Volume9
Issue number7
Publication statusPublished - 3 Jul 2000

Abstract

In this paper we present a simple scanning thermocouple technique for measuring the thermal conductivity (κ) of diamond thin films. We first describe the fabrication procedure of the thermocouple tip, which involves first fixing a 10-μm-thick tungsten wire inside a glass capillary tube and then coating the exposed tip with gold. The gold/tungsten thermocouple was used to map the temperature distribution on the diamond surface. The measured data are fitted into the solution obtained from solving the steady-state heat conduction equations which also take into account the heat loss from the sample. For our diamond sample, the measured κ for the temperature range between 299.2 K and 317.4 K is between 5.4 and 6.2 (±0.6) W cm-1 K-1, which is within the range published elsewhere for 'dark' CVD diamond materials. (C) 2000 Elsevier Science S.A. All rights reserved.

Research Area(s)

  • Diamond films, Scanning thermocouple technique, Thermal conductivity