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Study on a Thermal-diffusivity Standard for Laser Flash Method Measurements

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The National Metrology Institute of Japan (NMIJ) of AIST has been studying the laser flash method in order to establish an SI traceable thermal- diffusivity standard. Key technologies have been developed to reduce the uncertainty in laser flash measurements. In the present study, an uncertainty evaluation has been carried out on the laser flash measurement method in order to determine the thermal diffusivity value of IG-110, a grade of isotropic high-density graphite, as a candidate reference material. The thermal diffusivity measured by the laser flash method is derived from a specimen thickness and a heat diffusion time. And a laser flash measurement is carried out at a given temperature. The measurement system is composed of three sections corresponding to each measured quantity: length, time, and temperature. Therefore, we checked and calibrated our measurement system, and estimated the uncertainty of measurement results for the case of a grade of isotropic graphite.

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Authors and Affiliations

  1. National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki, 305-8563, Japan

    M. Akoshima & T. Baba

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  1. M. Akoshima
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  2. T. Baba
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Correspondence to M. Akoshima.

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Akoshima, M., Baba, T. Study on a Thermal-diffusivity Standard for Laser Flash Method Measurements. Int J Thermophys 27, 1189–1203 (2006). https://doi.org/10.1007/s10765-006-0091-9

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  • DOI: https://doi.org/10.1007/s10765-006-0091-9

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