Compensation mechanisms at high temperature in Y-doped BaTiO3

M. Paredes-Olguín; I. A. Lira-Hernández; C. Gómez-Yáñez; F. P. Espino-Cortés

doi:10.1016/j.physb.2012.11.001

Compensation mechanisms at high temperature in Y-doped BaTiO₃

M. Paredes-Olguín, I. A. Lira-Hernández, C. Gómez-Yáñez, F. P. Espino-Cortés

Escuela Superior de Ingeniería Mecánica y Eléctrica (ESIME), Unidad Zacatenco

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

12 Citas (Scopus)

Resumen

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.

Idioma original	Inglés
Páginas (desde-hasta)	157-161
Número de páginas	5
Publicación	Physica B: Condensed Matter
Volumen	410
N.º	1
DOI	https://doi.org/10.1016/j.physb.2012.11.001
Estado	Publicada - 1 feb. 2013

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abstract = "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.",

keywords = "BaTiO and titanates, Defects, Electrical conductivity, Sintering",

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AU - Lira-Hernández, I. A.

AU - Gómez-Yáñez, C.

AU - Espino-Cortés, F. P.

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AB - 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.

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