Evaluation of the Effective Sample Temperature in Thermal Diffusivity Measurements Using the Laser Flash Method

H. Ohta, T. Baba, H. Shibata, Y. Waseda

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In the measurement of thermal diffusivity by the laser flash method, a temperature rise occurs in the sample as a pulsed laser hits on the sample surface. Due to the temperature dependence of thermal diffusivity of the sample, the thermal diffusivity corresponds to a temperature that is larger by T eff than the temperature before laser irradiation is applied. This effective temperature rise, Teff, has been investigated by using a numerical simulation. The results indicate that the effective temperature rise is almost equal to a maximum temperature rise, TM, of the back surface of the sample in cases where both linear and nonlinear temperature variations of thermal diffusivity are considered.

Original languageEnglish
Pages (from-to)1659-1668
Number of pages10
JournalInternational Journal of Thermophysics
Volume23
Issue number6
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Glassy carbon
  • Laser flash method
  • Pulse width
  • Temperature dependence
  • Thermal diffusivity

ASJC Scopus subject areas

  • Condensed Matter Physics

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