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Research Article | Open Access

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

Xiuli CHEN( ), Xu LI, Huanfu ZHOU, Jie SUN, Xiaoxia LI, Xiao YAN, Congcong SUN, Junpeng 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
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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

structurethermal stabilityenergy storage

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Journal of Advanced Ceramics
Volume 8 Issue 3,
September 2019
Pages 427-437
DOI: 10.1007/s40145-019-0326-4

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CHEN X, LI X, ZHOU H, et al. Phase evolution, microstructure, electric properties of (Ba1-xBi0.67xNa0.33x)(Ti1-xBi0.33xSn0.67x)O3 ceramics. Journal of Advanced Ceramics, 2019, 8(3): 427-437. https://doi.org/10.1007/s40145-019-0326-4

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Received: 28 December 2018
Revised: 08 March 2019
Accepted: 22 March 2019
Published: 05 August 2019
© The author(s) 2019

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