کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7924247 1511968 2015 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and thermoelectric properties in Fe-doped ZrCoSb half-Heusler compounds
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Microstructure and thermoelectric properties in Fe-doped ZrCoSb half-Heusler compounds
چکیده انگلیسی
This study aimed to understand the effect of Fe-doped ZrCoSb-based half-Heusler compounds on the microstructures and thermoelectric properties. ZrFexCo1−xSb (x = 0-0.6) were prepared by arc melting. XRD results indicated that α-Fe, ZrCoSb half-Heusler phase and Fe0.63ZrSb can be found in ZrFexCo1−xSb alloy. In addition, the peak of Fe0.63ZrSb increase with increasing of Fe content. SEM results show a tendency of grain refinement, where the grain size decreases with increasing of Fe content. The Seebeck coefficient changed from negative to positive by Fe doping, and the electrical conductivity increased with increasing Fe content. The thermal conductivity for ZrFexCo1−xSb is considerably reduced, because the point defects, mass fluctuations and strain field effects induced by Fe substitution for Co intensively scatter the thermal phonons. Fe doping improved the thermoelectric figure of merit ZT of ZrFexCo1−xSb and the maximum ZT value of 0.036 was obtained for ZrFe0.2Co0.8Sb sample at 900 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 198, August 2015, Pages 80-85
نویسندگان
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