کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1623918 1516417 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Crystal structure analysis and thermoelectric properties of p-type pseudo-binary (Al2Te3)x–(Bi0.5Sb1.5Te3)1−x (x = 0 ∼ 0.2) alloys prepared by spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Crystal structure analysis and thermoelectric properties of p-type pseudo-binary (Al2Te3)x–(Bi0.5Sb1.5Te3)1−x (x = 0 ∼ 0.2) alloys prepared by spark plasma sintering
چکیده انگلیسی

p-Type pseudo-binary alloys (Al2Te3)x–(Bi0.5Sb1.5Te3)1−x (x = 0 ∼ 0.2) were prepared by spark plasma sintering (SPS) technique and their thermoelectric properties were evaluated. Measurements show that the Seebeck coefficient decreases and electrical conductivity increases with Al2Te3 content increasing due to a possible increment of free carrier (holes) concentration and establishment of special conducting mechanism upon adding Al2Te3. Thermal conductivity (κ) increases with temperature but reduces noticeably over the broad temperature range, such a reduction is directly attributed to the enhancement of phonon scattering resulted from both the precipitation of the second phase AlSb and nearly 12% atomic occupation of element Al in Te1 and Te2 sites in the crystal. The maximum ZT value of 0.86 can be obtained for x = 0.1 at 419 K, which is 0.28 higher than that of Bi0.5Sb1.5Te3 under the same fabrication technology.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 460, Issues 1–2, 28 July 2008, Pages 426–431
نویسندگان
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