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- Title
Dielectric and impedance studies of (PbCa)(FeNb)O dielectric ceramics.
- Authors
Puri, Maalti; Bahel, Shalini; Raevski, I.; Narang, Sukhleen
- Abstract
Ceramic samples of (PbCa)(FeNb)O with x = 0.20, 0.40, 0.45, 0.50, 0.55 and 0.60 were obtained by columbite precursor method. All the synthesized samples have perovskite structure with pseudo-cubic symmetry. Dielectric properties of all the samples were measured as a function of frequency from room temperature up to 573 K. Two dielectric anomalies were observed in ε-T plots at about 400 and 500 K. The impedance analysis depicts a single relaxation process. Activation energies obtained from temperature dependence of relaxation frequency, f and grain resistance, R were found to be more or less comparable. The observed relaxation in all the samples seems to be due to electron relaxation associated with oxygen vacancies.
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 2, p1077
- ISSN
0957-4522
- Publication type
Academic Journal
- DOI
10.1007/s10854-015-3854-x