کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1518089 1511625 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modification of dielectric relaxations in sodium bismuth titanate with samarium doping
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Modification of dielectric relaxations in sodium bismuth titanate with samarium doping
چکیده انگلیسی

Na0.5Bi(0.5−x) SmxTiO3 (NBST) ceramics with x=0.05x=0.05, 0.1, and 0.15 are prepared through chemical route. The X-ray diffraction studies confirmed the formation of single phase. Dielectric measurements in the temperature region ranging from room temperature (∼30 °C) to 600 °C at different frequencies (10 kHz–1 MHz) showed anomalies at 130, 306, and 474 °C (at 10 kHz frequency) for x=0.05x=0.05 sample. Other samples showed only two peaks. To establish the electrical nature of these relaxations, impedance measurements are done at different temperatures and frequencies. The relaxation time, obtained from both impedance and modulus data, is found to decrease with increase in temperature. The relaxations observed are of non-Debye type. Increase in samarium content increases the activation energy for relaxation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issue 8, August 2006, Pages 1803–1808
نویسندگان
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