کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1518673 1511622 2006 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dielectric and AC conductivity behavior of BaBi2Nb2O9 ceramics
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Dielectric and AC conductivity behavior of BaBi2Nb2O9 ceramics
چکیده انگلیسی

The complex dielectric and AC conductivity response of BaBi2Nb2O9 relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz–10 MHz) at various temperatures. The observed dielectric behavior was characterized by two types of relaxation processes which were described by the ‘universal relaxation law’. The frequency dependence of conductivity which showed a classical relaxor behavior followed the Jonscher's universal law σ(ω)=σ0+Aωnσ(ω)=σ0+Aωn. The exponent n exhibited a minimum in the vicinity of temperatures of dielectric anomaly while the pre-factor A showed a maximum. The temperature dependence of n followed the Vogel–Fulcher relation with activation energy of about 0.14 eV.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issue 12, December 2006, Pages 2437–2441
نویسندگان
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