Deviation from Wiedemann-Franz Law for the Thermal Conductivity of Liquid Tin and Lead at Elevated Temperature

E. Yamasue, M. Susa, H. Fukuyama, K. Nagata

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The thermal conductivities of tin and lead in solid and liquid states have been determined using a nonstationary hot wire method. Measurements on tin and lead were carried out over temperature ranges of 293 to 1473 K and 293 to 1373 K, respectively. The thermal conductivity of solid tin is 63.9 ± 1.3 W · m-1 · K-1 at 293 K and decreases with an increase in temperature, with a value of 56.6 ± 0.9 W · m -1 · K-1 at 473 K. For solid lead, the thermal conductivity is 36.1 ± 0.6 W · m-1 · K -1 at 293 K, decreases with an increase in temperature, and has a value of 29.1 ± 1.1 W · m-1 · K-1 at 573 K. The temperature dependences for solid tin and lead are in good agreement with those estimated from the Wiedemann-Franz law using electrical conductivity values. The thermal conductivities of liquid tin displayed a value of 25.7 ± 1.0 W · m-1 · K-1 at 573 K, and then increased, showing a maximum value of about 30.1 W · m-1 · K-1 at 673 K. Subsequently, the thermal conductivities gradually decreased with increasing temperature and the thermal conductivity was 10.1 ± 1.0 W · m-1 · K-1at 1473 K. In the case of liquid lead, the same tendency, as was the case of tin, was observed. The thermal conductivities of liquid lead displayed a value of 15.4 ± 1.2 W · m-1 · K-1 at 673 K, with a maximum value of about 15.6 W · m-1 · K-1 at 773 K and a minimum value of about 11.4 ± 0.6 W · m -1 · K-1 at 1373 K. The temperature dependence of thermal conductivity values in both liquids is discussed from the viewpoint of the Wiedemann-Franz law. The thermal conductivities for Group 14 elements at each temperature were compared.

Original languageEnglish
Pages (from-to)713-730
Number of pages18
JournalInternational Journal of Thermophysics
Volume24
Issue number3
DOIs
Publication statusPublished - 2003 May 1
Externally publishedYes

Keywords

  • Lead
  • Liquid
  • Thermal conductivity
  • Tin
  • Wiedemann-Franz law

ASJC Scopus subject areas

  • Condensed Matter Physics

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