Solid Solutions Study of BaTiO₃ Doped on B Site by Electronic Compensation

Abstract:

Several compositions of BaTiO:Nb5⁺ were made by conventional solid-state method in air atmosphere, according to the general formula BaTi_1-xNb_xO₃; (x= 0.005, 0.04, 0.08, 0.20, and 0.25). The crystal structure, microstructure, dielectric and ferroelectric properties of samples were investigated by XRD, Raman Spectroscopy, Electrical Measurements and SEM. X-ray diffraction results clearly indicated that when x ≥ 0.25 was prepared; the hexagonal phase Ba₈Ti₃Nb₄O₂₄ appeared. Electrical measurements at 1 kHz were carried out and several pellets were made, the relative permittivity was calculated. The dielectric constant of the pristine BaTiO₃ is about 7000, and the Curie temperature is ≈120°C at room temperature, decreasing to 90°C with Nb⁵⁺ addition (x = 0.005).

• Periodical: Advanced Materials Research (Volume 976)
• Pages: 30-35
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.976.30
• Online since: June 2014
• Authors: Francisco Raúl Barrientos-Hernández*, Alberto Arenas-Flores, Iván Alonso Lira Hernández, Carlos Gómez-Yáñez, Miguel Pérez Labra
• Keywords: Curie Temperature, Dielectric, Ferroelectric, Permittivity, Perovskite

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DOI: 10.1016/s0955-2219(00)00076-5

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