Effect of nonstoichiometry on the thermoelectric properties of Tl4TiS4 crystals

Stoichiometric (1), Tl 2 S-enriched (2), and TiS 2 -enriched (3) Tl 4 TiS 4 crystals (with deviations from stoichiometry within the homogeneity range of the ternary compound) have been grown by the Bridgman method, and their thermoelectric properties have been studied by the Harman technique. All of...

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Bibliographic Details
Published in:Inorganic materials 2010, Vol.46 (1), p.11-13
Main Authors: Sabov, M. Yu, Sevryukov, D. V., Galagovets, I. V., Betsa, V. V., Peresh, E. Yu
Format: Article
Language:English
Subjects:
Bridgman method
Chemistry
Chemistry and Materials Science
Crystal growth
Crystals
Deviation
Figure of merit
Homogeneity
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Materials Science
Stoichiometry
Thermoelectricity
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Summary:Stoichiometric (1), Tl 2 S-enriched (2), and TiS 2 -enriched (3) Tl 4 TiS 4 crystals (with deviations from stoichiometry within the homogeneity range of the ternary compound) have been grown by the Bridgman method, and their thermoelectric properties have been studied by the Harman technique. All of the crystals have a high thermoelectric figure of merit. The highest figure of merit is offered by crystal 1 at positive thermoelectric powers and by crystal 3 at negative thermoelectric powers. The thermoelectric properties of crystal 2 were found to irreversibly degrade over time.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168510010036