کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1462754 989638 2013 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Study of AC electrical properties of V2O5–P2O5–B2O3–Dy2O3 glasses
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Study of AC electrical properties of V2O5–P2O5–B2O3–Dy2O3 glasses
چکیده انگلیسی

The AC conductivity of glass samples of composition 60V2O5–5P2O5–(35−x)B2O3–xDy2O3, 0.4≤x≤1.2 has been analyzed. The samples were prepared by the usual melt-quench technique. The prepared compounds were analyzed by X-ray diffraction (XRD) and thermo gravimetric–differential thermal analysis (TG/DTA). The activation energies were evaluated using glass transition temperature (Tg) and peak temperature of crystallization (Tc) from TG/DTA. The dependence of activation energy on composition was discussed. The electrical conductance and capacitance were measured over a frequency range of 20 Hz to 1 MHz and a temperature range of 303–473 K; these reveal semiconducting features based predominantly on an ionic mechanism. The dielectric and complex-impedance response of the sample is discussed. The relaxation time was found to increase with increasing temperature. Jonscher's universal power law is applied to discuss the conductivity. The electrode polarization was found to be negligible and confirmed from electrical modulus.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 39, Issue 6, August 2013, Pages 6303–6311
نویسندگان
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