A reference material for laser flash apparatus for thermal diffusivity measurements

S. Lee2, S. Kwon2 and H. Ham1

1KRISS (Korea Research Institute of Standards and Science), Korea
2Kyungpook National University, Korea

Keywords: reference material, laser flash
property: thermal diffusivity
material: silicon carbide

The laser flash method is very useful methods as the test method for the thermal diffusivity and is used to measure over a wide temperature range. This apparatus is needed a reference material for a system check and evaluation of uncertainty. Recently, Akoshima’s group (NMIJ, AIST Japan) was developed to the isotropic graphite (IG 110) as a reference material for laser flash apparatus. IG 110 is from 1.3 x 10-5 m2s-1 to 1.0 x 10-4 m2s-1 and used pilot study for CCT WG 9. Pyroceram 9606 as BCR-724 reference material for thermal transport properties was developed by NPL (UK) etc. and distributed by Institute of Reference Materials and Measurements (IRMM). Thermal diffusivity of Pyroceram 9606 is a 1.9 x 10-6 m2s-1 to 8.8 x 10-7 m2s-1 temperature range from 300 K to 1300 K. We established a laser flash system temperature range 150 K to 700 K in vacuum or inactive gas atmosphere and development of reference material for this system. The thermal conductivity of SiC (slilicon carbide) ceramics was varied by additive materials and gray color is suitable to the laser flash method. We expect to the thermal diffusivity of SiC is a between IG 110 and Pyroceram 9606, and from 1.8 x 10-4 m2s-1 to 2.0 x 10-5 m2s-1 dependent on temperature.

  1. M. Akoshima and T. Baba, Int. J. Thermophy. 27, 1189 (2006)

  2. D. Salmon, G. Roebben, A. Lamberty, R. Brandt, BCR-724, IRMM (2007).

  3. Y. Zhou et al., J. Eur. Ceram. Soc., 24, 265 (2004).

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