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JOURNALS // Teplofizika vysokikh temperatur // Archive

TVT, 2000 Volume 38, Issue 6, Pages 910–914 (Mi tvt2199)

This article is cited in 19 papers

Thermophysical Properties of Materials

Thermophysical properties of sulfides of lanthanum, praseodymium, gadolinium, and dysprosium

G. G. Gadzhieva, Sh. M. Ismailova, M. M. Khamidova, Kh. Kh. Abdullaeva, V. V. Sokolovb

a Daghestan Institute of Physics after Amirkhanov, Makhachkala
b Institute of Inorganic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk

Abstract: The temperature dependence of the thermal conductivity, electrical conductivity, thermoelectromotive force, and thermal expansion coefficient for sulfides of lanthanum, gadolinium, praseodymium and dysprosium of the composition $\mathrm{Ln}_{3-x}\mathrm{V}_x\mathrm{S}_4$ is investigated in the temperature range from $300$ to $1200$ K. It is shown that the transfer phenomena and thermoelectrical properties of the investigated compositions depend on the concentration of current carriers, cation vacancies, and mobility. Gadolinium sulfide is found to have the highest thermoelectrical efficiency. The scattering from ions of rare-earth elements has a noticeable effect on the magnitude and temperature dependence of the lattice thermal conductivity and electrical resistance.

UDC: 537.32.323

Received: 10.01.2000


 English version:
High Temperature, 2000, 38:6, 875–879

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