کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1611783 | 1516295 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and thermoelectric properties of Sb0.20CoSb2.80 skutterudite
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Polycrystalline samples of cobalt antimonide (CoSb2.79) were submitted to different conditions of pressure, temperature and processing time, in a high-pressure toroidal-type chamber, aiming to maximize the production of the high pressure phase previously observed in experiments with a diamond anvil cell. Rietveld refinements of X-ray powder diffraction data were performed to determine the phase composition and structural parameters. The maximum yield, 89(2) wt.% of SbxCoSb3âx phase, was obtained at 7.7 GPa, 550 °C and (at least) 5 min of processing time. The mechanism behind the formation of SbxCoSb3âx at high pressure and high temperature is actually not the same as that previously inferred from experiments at higher pressures (20 GPa) and room temperature with the diamond anvil cell. Indeed, evidences suggest that, at high pressure and high temperature, SbxCoSb3âx is formed by insertion of Sb resulting from decomposition of cobalt antimonide. Thermal conductivity, Seebeck coefficient and electrical conductivity were estimated for CoSb2.79 and Sb0.20CoSb2.80. The thermoelectric figure of merit at room temperature for Sb0.20CoSb2.80 resulted 33% greater than that for CoSb2.79.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 598, 15 June 2014, Pages 266-271
Journal: Journal of Alloys and Compounds - Volume 598, 15 June 2014, Pages 266-271
نویسندگان
C.A. Figueirêdo, M.R. Gallas, J.E. Zorzi, C.A. Perottoni,