کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1616271 1516372 2012 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis and thermoelectric properties of In0.2+xCo4Sb12+x composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Synthesis and thermoelectric properties of In0.2+xCo4Sb12+x composite
چکیده انگلیسی

In this work we have synthesized In0.2+xCo4Sb12+x samples using a melting–annealing–hot pressing procedure, with the In and Sb contents concomitantly varied. The microstructures and thermoelectric properties have been subsequently studied and correlated. Increasing x value leads to an increase of the electrical conductivity, a decrease of the Seebeck coefficient in magnitude, and non-monotonic changes in the power factor and the lattice thermal conductivity. In particular, we have for the first time observed the InSb/Sb eutectic formation through thermal analysis when x is well above 0.2. The high density of interfaces via the formation of InSb/Sb mixture on the grain boundaries seems to decrease the lattice thermal conductivity and accounts for a dimensionless figure of merit, ZT, of 1.0 in In0.8Co4Sb12.6 at 650 K.


► Skutterudite-based composite has been prepared with InSb/Sb eutectic.
► Electrical resistivity is significantly decreased.
► Existence of InSb/Sb mixture on the grain boundaries increases interface density.
► Lattice thermal conductivity deceases due to increased interface density.
► A considerable enhancement of thermoelectric performance has been obtained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 521, 25 April 2012, Pages 141–145
نویسندگان
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