کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1506629 993802 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of nano-TiO2 dispersion on the thermoelectric properties offilled-skutterudite Ba0.22Co4Sb12
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Effects of nano-TiO2 dispersion on the thermoelectric properties offilled-skutterudite Ba0.22Co4Sb12
چکیده انگلیسی

Homogeneously dispersed nano-TiO2 was introduced into the matrix of n-type barium-filled cobalt antimony (Ba0.22Co4Sb12) via sol–gel method successfully. The Seebeck coefficients are improved and the lattice thermal conductivities are depressed with a proper addition of nano-TiO2 not more than 0.8 vol.%, while the electrical conductivities nearly remain unchanged. The effects of n-type semiconductive nanoscale inclusions on the electrical and thermal transport characteristics are discussed. Microstructure analyses indicate that the fine nanoinclusions locate on the grain boundaries as well as inside grains, which serve as extra phonon scattering mode and new type energy filtering. As a result, the optimal ZT value was achieved for the sample of 0.4 vol.% TiO2 composition.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 11, Issue 9, September 2009, Pages 1612–1616
نویسندگان
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