کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5460831 | 1516196 | 2017 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrical and dielectric properties of the Li 1.5Na0.5WO4 compound
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
In the context to determinate the electrical proprieties of new composition of Li1.5Na0.5WO4 compound we have synthesized and characterized this compound by X-ray diffraction, Raman spectroscopy, calorimetric study and impedance spectroscopy. The purity of this compound is showed by the X-ray diffraction which indicates that this material has a monoclinic structure with P2/m space group and the lattice parameters are: a = 15.914 Ã
, b = 7.191 Ã
, c = 12.628 Ã
and β = 114.313°. All modes of vibrations of WO42â tetrahedral appear in the Raman spectrum. The calorimetric and dielectric studies show a single phase transitions at 501 K. The impedance spectroscopy shows the contribution of the grain which allows choosing an equivalent circuit modeled by parallel combination of resistance (R), a capacitance (C) and constant phase element (CPE). The variation of the Ïg and Ïdc as a function of temperature confirms the phase transition observed in the calorimetric study. The conduction mechanism in the two phases indicates that the first phase (I) described by the OLPT model and the second by the CBH model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 698, 25 March 2017, Pages 510-517
Journal: Journal of Alloys and Compounds - Volume 698, 25 March 2017, Pages 510-517
نویسندگان
M. Krimi, K. Karoui, A. Ben Rhaiem,