Compensation mechanisms at high temperature in Y-doped BaTiO3
- 1. Department of Metallurgical and Materials Engineering, ESIQIE National Polytechnic Institute, U.P.A. Lopez Mateos, Zacatenco, Mexico City 07738 (Mexico)
- 2. Department of Electrical Engineering, SEPI-ESIME National Polytechnic Institute, U.P.A. Lopez Mateos, Zacatenco, Mexico City 07738 (Mexico)
Description
Samples of BaTiO3 with different concentrations of Y were synthesized from powders. The mixtures of powders were pressed and sintered at 1500 °C for 1 h. Two groups of samples were processed, one satisfying Ba/(Ti+Y)<1 and the other satisfying Ba/(Ti+Y)=1. X-ray diffraction patterns were analyzed by Rietveld refinement and it was concluded that Y3+ occupies the Ti4+ lattice sites. The conductivity behavior as a function of Y concentration suggests that the compensation mechanisms are hole and oxygen vacancies. Due to the presence of charge carriers in the material, high values for the dielectric constant and dielectric loss were observed. Analysis of the microstructure showed that the average grain size decreases as the Y concentration is increased.
Availability note (English)
Available from http://dx.doi.org/10.1016/j.physb.2012.11.001Additional details
Identifiers
- DOI
- 10.1016/j.physb.2012.11.001;
- PII
- S0921-4526(12)00973-8;
Publishing Information
- Journal Title
- Physica. B, Condensed Matter
- Journal Volume
- 410
- Journal Issue
- Complete
- Journal Page Range
- p. 157-161
- ISSN
- 0921-4526
- CODEN
- PHYBE3
INIS
- Country of Publication
- Netherlands
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 44041730
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- BARIUM COMPOUNDS; CHARGE CARRIERS; CRYSTAL DEFECTS; DIELECTRIC MATERIALS; DOPED MATERIALS; ELECTRIC CONDUCTIVITY; GRAIN SIZE; LOSSES; OXYGEN; PERMITTIVITY; POWDERS; SINTERING; TITANATES; TITANIUM IONS; VACANCIES; X-RAY DIFFRACTION; YTTRIUM ADDITIONS; YTTRIUM IONS
- Descriptors DEC
- ALKALINE EARTH METAL COMPOUNDS; CHARGED PARTICLES; COHERENT SCATTERING; CRYSTAL DEFECTS; CRYSTAL STRUCTURE; DIELECTRIC PROPERTIES; DIFFRACTION; ELECTRICAL PROPERTIES; ELEMENTS; FABRICATION; IONS; MATERIALS; MICROSTRUCTURE; NONMETALS; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; POINT DEFECTS; SCATTERING; SIZE; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.