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(Ba1-xBi0.67xNa0.33x)(Ti1-xBi0.33xSn0.67x)O3 (abbreviated as BBNTBS, 0.02 ≤ x ≤ 0.12) ceramics were fabricated via a traditional solid state reaction method. The phase transition of BBNTBS from tetragonal to pseudo cubic is demonstrated by XRD and Raman spectra. The BBNTBS (x = 0.1) ceramics have decent properties with a high εr (~2250), small Δε/ε25°C values of ±15% over a wide temperature range from -58 to 171 ℃, and low tanδ ≤ 0.02 from 10 to 200 ℃. The basic mechanisms of conduction and relaxation processes in the high temperature region were thermal activation, and oxygen vacancies might be the ionic charge transport carriers. Meanwhile, BBNTBS (x = 0.1) exhibited decent energy storage density (Jd = 0.58 J/cm3) and excellent thermal stability (the variation of Jd is less than 3% in the temperature range of 25-120 ℃), which could be a potential candidate for high energy density capacitors.


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Phase evolution, microstructure, electric properties of (Ba1-xBi0.67xNa0.33x)(Ti1-xBi0.33xSn0.67x)O3 ceramics

Show Author's information Xiuli CHEN( )Xu LIHuanfu ZHOUJie SUNXiaoxia LIXiao YANCongcong SUNJunpeng SHI
Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi, Key Laboratory of Nonferrous Materials and New Processing Technology, Ministry of Education, School of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China

Abstract

(Ba1-xBi0.67xNa0.33x)(Ti1-xBi0.33xSn0.67x)O3 (abbreviated as BBNTBS, 0.02 ≤ x ≤ 0.12) ceramics were fabricated via a traditional solid state reaction method. The phase transition of BBNTBS from tetragonal to pseudo cubic is demonstrated by XRD and Raman spectra. The BBNTBS (x = 0.1) ceramics have decent properties with a high εr (~2250), small Δε/ε25°C values of ±15% over a wide temperature range from -58 to 171 ℃, and low tanδ ≤ 0.02 from 10 to 200 ℃. The basic mechanisms of conduction and relaxation processes in the high temperature region were thermal activation, and oxygen vacancies might be the ionic charge transport carriers. Meanwhile, BBNTBS (x = 0.1) exhibited decent energy storage density (Jd = 0.58 J/cm3) and excellent thermal stability (the variation of Jd is less than 3% in the temperature range of 25-120 ℃), which could be a potential candidate for high energy density capacitors.

Keywords:

structure, thermal stability, energy storage
Received: 28 December 2018 Revised: 08 March 2019 Accepted: 22 March 2019 Published: 05 August 2019 Issue date: September 2019
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Publication history

Received: 28 December 2018
Revised: 08 March 2019
Accepted: 22 March 2019
Published: 05 August 2019
Issue date: September 2019

Copyright

© The author(s) 2019

Acknowledgements

This work was supported by National Natural Science Foundation of China (Nos. 11664008 and 61761015), and Natural Science Foundation of Guangxi (Nos. 2018GXNSFFA050001, 2017GXNSFDA198027, and 2017GXNSFFA198011).

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