کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1792932 1023661 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparison of space- and ground-grown Bi2Se0.21Te2.79 thermoelectric crystals
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Comparison of space- and ground-grown Bi2Se0.21Te2.79 thermoelectric crystals
چکیده انگلیسی

Two crystals of Bi2Se0.21Te2.79 doped with 0.08 wt% TeI4 were grown by zone melting on the Foton-M3 spacecraft of Russia and the ground in 2007, respectively. The chemical composition, structure and thermoelectric properties of the space and ground crystals grown were evaluated by EPMA, XRD and thermoelectric measurements including Seebeck coefficient, electrical conductivity and thermal conductivity. The compositions of the space crystal grown along growth direction were more homogeneous than that of the ground crystal grown. The crystallization of space crystal grown was obviously improved. The maximum ZT value of space crystal reached 1.14 at 300 K, which was higher about 29% than that of ground crystal at room temperature. These results imply that the composition homogeneity and crystallization of Bi2Se0.21Te2.79 crystal can be improved under microgravity conditions, which is helpful for enhancing thermoelectric figure of merit of Bi2Te3-base materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 312, Issue 6, 1 March 2010, Pages 775–780
نویسندگان
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