کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1627601 1516455 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of non-stoichiometry on thermoelectric properties of γ-Tb2S3−x
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Effect of non-stoichiometry on thermoelectric properties of γ-Tb2S3−x
چکیده انگلیسی

The electrical resistivity, thermopower, and thermal conductivity measurements have been made on the cubic γ-Tb2S3−x with low sulfur content. The powders were synthesized by reacting the oxide with carbon disulfide at 1323 K, followed by heating at 1853 K. The heat treatments lead to a decrease in the sulfur content. In order to obtain the samples close to the theoretical density solids, the powders were consolidated by a pulse electric current sintering at 1673 K. In the temperature range from 300 to 1000 K, all the samples exhibit a high negative thermopower. The electrical resistivity and the magnitude of thermopower increase almost linearly with increasing temperature. The thermal conductivity ranges from 1.3 to 1.4 W/K m. The thermoelectric properties improve for decreasing sulfur content. A maximum thermoelectric figure of merit of 0.17 was obtained at 873 K for these compounds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 418, Issues 1–2, 20 July 2006, Pages 209–212
نویسندگان
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