کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10620458 | 988631 | 2012 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermoelectric properties of p-type skutterudites YbxFe3.5Ni0.5Sb12 (0.8 ⩽ x ⩽ 1)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
p-Type skutterudites, with nominal compositions YbxFe3.5Ni0.5Sb12 (0.8 ⩽ x ⩽ 1), have been synthesized by induction melting with subsequent annealing, and their thermoelectric properties evaluated from 3.5 to 745 K to assess their suitability for thermoelectric-based waste heat recovery applications. We report results for the synthesis and measurements of Seebeck coefficient (S), electrical resistivity (Ï), thermal conductivity (κ), Hall coefficient (RH) and effective mass (m*/m0) of YbxFe3.5Ni0.5Sb12 (0.8 ⩽ x ⩽ 1). Powder X-ray diffraction and electron probe microanalysis show that this system has a narrow filling fraction range of x â¼Â 0.84-0.86 for Yb in the crystallographic voids. All samples show positive RH for the entire temperature range studied, with carrier concentrations ranging from 9.6 Ã 1020 to 2.8 Ã 1021 cmâ3 at room temperature. Relatively high values of S result in high power factors up to 17 μW cmâ1 Kâ2 at room temperature. However, large values of κ and a sharp reduction in the S at high temperature due to bipolar conduction prevent the attainment of high thermoelectric figure of merit.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Acta Materialia - Volume 60, Issue 5, March 2012, Pages 2104-2110
Journal: Acta Materialia - Volume 60, Issue 5, March 2012, Pages 2104-2110
نویسندگان
J.Y. Cho, Z. Ye, M.M. Tessema, R.A. Waldo, J.R. Salvador, J. Yang, W. Cai, H. Wang,