کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5492081 | 1525141 | 2017 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Ca2+ substitution on impedance and electrical conduction mechanism of Ba1âxCaxZr0.1Ti0.9O3 (0.00â¤xâ¤0.20) ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of Ca2+ substitution on impedance and electrical conduction mechanism of Ba1âxCaxZr0.1Ti0.9O3 (0.00â¤xâ¤0.20) ceramics Effect of Ca2+ substitution on impedance and electrical conduction mechanism of Ba1âxCaxZr0.1Ti0.9O3 (0.00â¤xâ¤0.20) ceramics](/preview/png/5492081.png)
چکیده انگلیسی
The Ca modified Ba1âxCaxZr0.1Ti0.9O3 (BCZT) system for x=0.00-0.20 is synthesized by the high-temperature conventional solid state reaction method. The morphotropic phase boundary (MPB) between the tetragonal and cubic structure is obtained at room temperature for the composition x=0.15. The doping of Ca facilitates the enhancement of the homogeneity of microstructure and growth of the grain size. The phase transition is also confirmed by Raman spectroscopy. In order to explore the effect of Ca concentration variation on the conduction mechanism of BaZr0.1Ti0.9O3 (BZT) ceramic, the frequency dependent ac impedance spectroscopy technique is used at various temperatures. The effect of Ca doping on the electrical properties of BZT is clearly noticeable. The resistance of the grain (bulk) and the grain boundary is increased as a consequence of the increase in the activation energy of Ca substituted BZT samples. The enhanced resistivity of the Ca substituted BZT ceramics is explained in terms of the decrease in the mobility of the charge carriers associated with the lattice distortion. The electric modulus analysis reveals the enhanced capacitance of BCZT ceramics which is in good agreement with the results obtained from complex impedance analysis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 508, 1 March 2017, Pages 124-135
Journal: Physica B: Condensed Matter - Volume 508, 1 March 2017, Pages 124-135
نویسندگان
Tanusree Mondal, Sayantani Das, T. Badapanda, T.P. Sinha, P.M. Sarun,