کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1518089 | 1511625 | 2006 | 6 صفحه PDF | دانلود رایگان |

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.
Journal: Journal of Physics and Chemistry of Solids - Volume 67, Issue 8, August 2006, Pages 1803–1808