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- Title
Study of aliovalent modification on dielectric and ac conductivity properties in lead titanate nanoceramics.
- Authors
Shukla, Archana; Choudhary, R. N. P.
- Abstract
Substitution of aliovalent ions on Pb and Ti sites of ferroelectric lead titanate nanoceramics has been carried out by using a novel mechanical activation followed by a conventional solid-state reaction technique to modify the dielectric and electric properties. The Optimization of calcinations and sintering temperatures has been checked by thermal gravimetric analysis and repeated firing. High resolution X-ray diffractogram (HRXRD) analysis of some aspects of crystal structure showed that single phase compounds were formed exhibiting a tetragonal structure. The ferroelectric phase-transition of PLMT materials is studied using dielectric measurements. A shift in the transition temperature towards the lower-temperature side with increased doping concentration has been noticed. The electrical conductivity calculated from impedance data has been observed to increase as a function of Mn concentration. Conduction and charge carrier behaviors were studied based on study of frequency and temperature dependence of ac conductivity. The low temperature conductivity mechanism shows frequency dependence.
- Subjects
DIELECTRICS; LEAD; TITANATES; CERAMIC metals; ELECTRIC conductivity; ELECTRIC properties of metals; X-ray diffraction
- Publication
Journal of Materials Science: Materials in Electronics, 2011, Vol 22, Issue 9, p1222
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-011-0289-x