Published September 1, 2009
| Version v1
Journal article
Polaron relaxation associated with the localized oxygen vacancies in Ba0.85Sr0.15TiO3 ceramics at high temperatures
Creators
- 1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072 (China)
Description
The temperature and frequency dependences of dielectric properties of barium strontium titanate [Ba0.85Sr0.15TiO3 (BST15)] ceramics have been investigated. The dielectric relaxation behavior above 180 deg. C was observed in BST15 ceramics with broad dielectric peaks. The contribution of dc conduction and universal dielectric response to the relaxation has been studied. In contrast to typical ion conductor such as La2Mo2O9, the extent of dielectric dispersion shows the similar temperature dependence characteristic. Polaron theory indicates that the relaxation in BST15 ceramics at high temperatures is associated with the hopping localized oxygen vacancies.
Additional details
Identifiers
- DOI
- 10.1063/1.3211308;
Publishing Information
- Journal Title
- Journal of Applied Physics
- Journal Volume
- 106
- Journal Issue
- 5
- Journal Page Range
- p. 054102-054102.5
- ISSN
- 0021-8979
- CODEN
- JAPIAU
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 41096360
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BARIUM; BARIUM COMPOUNDS; CERAMICS; CRYSTALS; DISPERSIONS; FERROELECTRIC MATERIALS; FREQUENCY DEPENDENCE; IONIC CONDUCTIVITY; OXYGEN; PERMITTIVITY; POLARONS; RELAXATION; STRONTIUM; STRONTIUM COMPOUNDS; TEMPERATURE DEPENDENCE; TITANATES; VACANCIES
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; ALKALINE EARTH METALS; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIELECTRIC MATERIALS; DIELECTRIC PROPERTIES; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTS; MATERIALS; METALS; NONMETALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; QUASI PARTICLES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Notes
- (c) 2009 American Institute of Physics