Study of the Dielectric Properties of Lead-Free Perovskite Ba(Fe1/2Ta1/2)O3 and Ba(Bi1/2Ta1/2)O3 Ceramics
Abstract
Lead-free complex perovskite ceramics Ba(Fe1/2Ta1/2)O3 and Ba(Bi1/2Ta1/2)O3 were synthesized using conventional solid state reaction technique. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software. XRD analysis of the compound indicated the formation of a single-phase cubic structure with the space group Pm3m. A very high value of dielectric constant (∼104) was observed for Ba(Fe1/2Ta1/2)O3 while for Ba(Bi1/2Ta1/2)O3 it is 639. The correlated barrier hopping (CBH) model was employed to successfully explain the mechanism of charge transport in Ba(Fe1/2Nb1/2)O3 and Ba(Bi1/2Ta1/2)O3.
- Publication:
-
XVI National Seminar on Ferroelectrics and Dielectrics (NSFD-XVI)
- Pub Date:
- November 2011
- DOI:
- 10.1063/1.3644441
- Bibcode:
- 2011AIPC.1372..188M
- Keywords:
-
- ceramics;
- crystal symmetry;
- X-ray diffraction;
- stoichiometry;
- 81.05.Je;
- 61.50.Ah;
- 61.05.cp;
- 61.50.Nw;
- Ceramics and refractories;
- Theory of crystal structure crystal symmetry;
- calculations and modeling;
- X-ray diffraction;
- Crystal stoichiometry