Get access
Advertisement

Preparation and Electric Properties of Bi0.5Na0.5TiO3Bi(Mg0.5Ti0.5)O3 Lead-Free Piezoceramics

Authors

  • Qi Wang,

    1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China
    Search for more papers by this author
  • Jun Chen,

    Corresponding author
    • Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China
    Search for more papers by this author
  • Longlong Fan,

    1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China
    Search for more papers by this author
  • Laijun Liu,

    1. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin, China
    Search for more papers by this author
  • Liang Fang,

    1. Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, Guilin University of Technology, Guilin, China
    Search for more papers by this author
  • Xianran Xing

    Corresponding author
    1. Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China
    2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, China
    • Department of Physical Chemistry, University of Science and Technology Beijing, Beijing, China
    Search for more papers by this author

Authors to whom co-correspondence should be addressed. e-mail: junchen@ustb.edu.cn and xing@ustb.edu.cn.

Abstract

Lead-free BNT-based piezoceramics, (1−x)Bi0.5Na0.5TiO3xBi(Mg0.5Ti0.5)O3 [(1−x)BNT–xBMT] (0.00 ≤  0.06) binary system, were synthesized using a conventional ceramic fabrication method. Effect of Bi(Mg0.5Ti0.5)O3 (BMT) substitution on room temperature (RT) crystal structure, and temperature dependence of electric properties were investigated. The XRD indicates that a pure perovskite phase is formed. The introduction of BMT decreases EC of BNT from 7.3 to 4.0 kV/mm, and increases d33 from 58 pC/N to 110 pC/N for the = 0.05. The system shows a typical ferroelectric (FE) polarization loop P(E) and butterfly bipolar strain-electric S(E) curve at RT. For the composition of 0.95BNT–0.05BMT antiferroelectric (AFE) phase appears near 80°C, characterized by a constricted P(E) loop and altered bipolar S(E) butterfly, and gradually prevails with increasing temperature. Temperature dependence of dielectric constant shows that TC increases from 310°C for pure BNT to 352°C for the = 0.05. The results indicate that the piezoelectric properties of BNT have been improved by means of Bi(Mg0.5Ti0.5)O3 substitution.

Get access to the full text of this article

Ancillary