Electrical and dielectric characterization of the Bi12TiO20 polycrystalline system

Authors

  • Denise de Jesus Santos Departamento de Física, Universidade Federal de Sergipe
  • Luciara B. Barbosa Departamento de Física, Universidade Federal de Sergipe
  • Zélia Soares Macedo Departamento de Física, Universidade Federal de Sergipe

Keywords:

Bismuth titanate, microstructure, impedance spectroscopy

Abstract

The production, electrical and dielectric characterization of bismuth titanate (Bi12TiO20-BTO) ceramic bodies are reported in this work. BTO has potential to technological applications that are closely related to its photo and radio-conductive properties. The experimental data obtained from AC electrical measurements were doconvoluted to obtain the separate contributions from grain and grain boundaries. For the samples sintered at low temperatures, it was observed the same charge transport mechanism related before for single crystalline samples, with activation energy at around 1 eV. Nevertheless, samples with higher density presented activation energies higher than 1eV, which can be related to a new conduction mechanism in this material. The relative permittivity presented a dispersive behaviour at low frequencies and the value ε=52 measured at 100 kHz is in good agreement with the value reported for single crystal.

Author Biographies

Denise de Jesus Santos, Departamento de Física, Universidade Federal de Sergipe



Luciara B. Barbosa, Departamento de Física, Universidade Federal de Sergipe


Zélia Soares Macedo, Departamento de Física, Universidade Federal de Sergipe


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How to Cite

Santos, D. de J., Barbosa, L. B., & Macedo, Z. S. (2011). Electrical and dielectric characterization of the Bi12TiO20 polycrystalline system. Scientia Plena, 5(5). Retrieved from https://scientiaplena.org.br/sp/article/view/631

Issue

Vol. 5 No. 5 (2009): May/Maio 2009

Section

Articles

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