کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10624793 989606 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Physical properties of (1−x)Ba0.95Pb0.05TiO3+xCo2O3 (x=0, 0.1, 0.3, 0.5, 1.0, 2.0 wt%) ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Physical properties of (1−x)Ba0.95Pb0.05TiO3+xCo2O3 (x=0, 0.1, 0.3, 0.5, 1.0, 2.0 wt%) ceramics
چکیده انگلیسی
The paper reports studies of the (1−x)Ba0.95Pb0.05TiO3 - xCo2O3 (x≤0.02) ceramics. Results of X-ray powder diffraction, dielectric, magnetic and IR measurements, as well as ab initio simulations are presented. The Co-doping induces small decrease of the (c/a) tetragonality of the perovskite lattice and leads to the gradual shift of the ferroelectric transition temperature from 398 K for x=0 down to 357 K for x=0.02. The conductivity activation energies are in the range 0.8-0.9 eV in agreement with the calculations. The high-temperature conductivity can be ascribed by the migration of oxygen vacancies introduced to compensate the charge deficiency due to Co3+ valence at the B-site of the perovskite lattice. At the base of present data we can say that BPTC is promising new multiferroic material with weak coupling between magnetic and ferroelectric properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 41, Issue 3, Part A, April 2015, Pages 3983-3991
نویسندگان
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