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Journal of Advanced Ceramics 2018, 7(3): 256-265 https://doi.org/10.1007/s40145-018-0277-1
Research Article | Open Access | Issue | Published: 10 October 2018

Temperature dependent conductivity of Bi4Ti3O12 ceramics induced by Sr dopants

Show Author's Information Lin WANG,  Mengqi GUI,  Hai-Bo JIN,  Xinyuan HU,  Yongjie ZHAO,  Naseer Muhammad ADNAN,  Jing-Bo LI( )
Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Keywords:
electrical properties, dielectric, defects, impedance analysis, Aurivillius compound
Cite this article:
WANG L, GUI M, JIN H-B, et al. Temperature dependent conductivity of Bi4Ti3O12 ceramics induced by Sr dopants. Journal of Advanced Ceramics, 2018, 7(3): 256-265. https://doi.org/10.1007/s40145-018-0277-1
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Abstract Full text Electronic supplementary material About this article

Bi4Ti3O12 is an important lead-free ferroelectric material. Doping modification of Bi4Ti3O12 has attracted great attention to improving its performances. In this work, the effect of Sr dopants on the microstructure, dielectric, and conductivity of Bi4Ti3O12 ceramic was investigated by XRD, SEM, and AC impedance spectroscopy. Substitution of 1 at% Sr for Bi decreased the grain size, suppressed the dielectric dispersion of Bi4Ti3O12 ceramic at room temperature, and resulted in different effects on the conductivity of grains and grain boundaries. The conductivity of grains in Bi4Ti3O12 ceramic was increased by the small amount of Sr dopants in the whole experimental temperature range. While the grain boundaries of 1 at% Sr-doped Bi4Ti3O12 exhibited lower conductivity than pure Bi4Ti3O12 below ~380 ℃ and higher conductivity above ~380 ℃. The experimental phenomena were interpreted in term of compensating defects for Sr dopants.


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Abstract
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Electronic supplementary material
About this article

Temperature dependent conductivity of Bi4Ti3O12 ceramics induced by Sr dopants

Show Author's information Lin WANG, Mengqi GUI, Hai-Bo JIN, Xinyuan HU, Yongjie ZHAO, Naseer Muhammad ADNAN, Jing-Bo LI( )
Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China

Abstract

Bi4Ti3O12 is an important lead-free ferroelectric material. Doping modification of Bi4Ti3O12 has attracted great attention to improving its performances. In this work, the effect of Sr dopants on the microstructure, dielectric, and conductivity of Bi4Ti3O12 ceramic was investigated by XRD, SEM, and AC impedance spectroscopy. Substitution of 1 at% Sr for Bi decreased the grain size, suppressed the dielectric dispersion of Bi4Ti3O12 ceramic at room temperature, and resulted in different effects on the conductivity of grains and grain boundaries. The conductivity of grains in Bi4Ti3O12 ceramic was increased by the small amount of Sr dopants in the whole experimental temperature range. While the grain boundaries of 1 at% Sr-doped Bi4Ti3O12 exhibited lower conductivity than pure Bi4Ti3O12 below ~380 ℃ and higher conductivity above ~380 ℃. The experimental phenomena were interpreted in term of compensating defects for Sr dopants.

Keywords: electrical properties, dielectric, defects, impedance analysis, Aurivillius compound

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Received: 06 December 2017
Revised: 07 March 2018
Accepted: 21 April 2018
Published: 10 October 2018
Issue date: September 2018

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© The author(s) 2018

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