Articles
  • Regulation of BaTiO3 ceramics’ electrical properties by varying Na0.5Bi0.5TiO3 dopants

  • Shuiyun Lia, Mingyang Maa, Yongshang Tiana,*, Ruobing Lia, Xiongjie Hub and Peng Liua

  • aCollege of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
    bLoyalty Enterprise Development (Xinyang) Co., LTd., Xinyang 464017, China

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The piezoelectricity of BaTiO3 (BT) ceramics could be effectively regulated by Na0.5Bi0.5TiO3 (NBT) compounds, and the mechanism is still controversial. In this work, BT-xNBT ceramics with various NBT contents (x) were synthesized by a conventional solid-state sintering process. The characteristic of phase, cross-section morphology, permittivity, ferroelectricity, and piezoelectricity were fully explored by some advanced test equipment. With an increment of x, the ceramics possessed a high densification with a sole tetragonal phase, the diffused phase transition and relaxor ferroelectricity enhanced firstly and then receded. The inherent ferroelectricity and large strain of NBT materials under an electric field were deemed as the reasons for the increased ferroelectricity and piezoelectric coefficients with excessive x, respectively. Moreover, influences of impurity phases, fine grains, internal stress, etc. on the electrical properties were also discussed. This work provides a novel strategy to regulate BT-based lead-free piezoelectric ceramics


Keywords: BT ceramics, NBT dopants, Tetragonal phase, Relaxor ferroelectricity, Piezoelectric coefficients

This Article

  • 2023; 24(4): 693-699

    Published on Aug 31, 2023

  • 10.36410/jcpr.2023.24.4.693
  • Received on Apr 24, 2023
  • Revised on Aug 4, 2023
  • Accepted on Aug 7, 2023

Correspondence to

  • Yongshang Tian

  • College of Chemistry and Chemical Engineering, Henan Key Laboratory of Utilization of Non-Metallic Mineral in the South of Henan, Xinyang Normal University, Xinyang 464000, China
    Tel : +86 0376 6390702 Fax: +86 0376 6390702

  • E-mail: tianyongshang423@163.com; tianyongshang@xynu.edu.c