کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10629255 991047 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low-temperature phase transition and transport properties of β-Cu2−xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Low-temperature phase transition and transport properties of β-Cu2−xSe fabricated using hydrothermal synthesis and evacuating-and-encapsulating sintering
چکیده انگلیسی
A series of phonon-liquid electron-crystal materials of β-Cu2−xSe (0 ≤ x ≤ 0.04) is fabricated using hydrothermal synthesis followed by evacuating-and-encapsulating sintering. These materials are characterized using powder X-ray diffraction, field-emission scanning electron micrograph, electronic and thermal transport. Low-temperature X-ray diffraction patterns along with the electronic and thermal transport data reveal that β-Cu2Se exhibit a phase transition at around 160 K. We find that all the electrical conductivity, carrier concentration and thermopower of β-Cu2−xSe increase with copper deficiency content x. A knee behavior is observed in the temperature dependence of both electrical resistivity and thermopower on cooling the samples from room temperature to around 160 K, which could be associated with the structural transition at the corresponding temperature. The thermal conductivity of β-Cu2−xSe at room temperature is found to be larger than that of α-Cu2−xSe.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 36, Issue 11, September 2016, Pages 2755-2760
نویسندگان
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