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- Title
High-temperature impedance spectroscopy of BaFeNbO ceramics doped with BiNaTiO.
- Authors
Huang, Yanmin; Shi, Danping; Liu, Laijun; Li, Guizhong; Zheng, Shaoying; Fang, Liang
- Abstract
BiNaTiO (BNT)-doped BaFeNbO (BFN) ceramics were synthesized by a two-step solid-state reaction. Temperature dependence of dielectric properties measured at different frequencies was investigated over broad temperature and frequency ranges. Impedance spectroscopy and universal dielectric response were employed to study the relaxation behavior and conductivity mechanism of the ceramics in a frequency range from 40 Hz to 100 MHz and a temperature range from 300 K to 800 K. The complex plane impedance data revealed the bulk and grain boundary contributions toward conductivity processes in the form of semicircular arcs. The high-temperature conductivity of ceramics is attributable to thermally activated second ionized oxygen vacancy.
- Publication
Applied Physics A: Materials Science & Processing, 2014, Vol 114, Issue 3, p891
- ISSN
0947-8396
- Publication type
Academic Journal
- DOI
10.1007/s00339-013-7735-y