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      https://www.ias.ac.in/article/fulltext/boms/044/0100

    • Keywords

       

      BNT; (Mn$_{1/3}$Nb$_{2/3})$^{4+}$; phase transition; piezoelectric; strain.

    • Abstract

       

      The complex ions (Mn$_{1/3}$Nb$_{2/3}$)$^{4+}$ doped 0.82BNT–0.18BKT (BNKT-xMN) ceramics were prepared by conventional solid-state sintering. The effects of the MN content on the structural and electrical properties of the BNKT-$x$MN ceramics were investigated. The grain size decreases sharply after doping MN. With the increase of the MN content, the phase structure changes from the rhombohedral and tetragonal phase to the tetragonal phase, then to the pseudo-cubic phase. The ferroelectric phase transforms to the relaxor phase. At critical phase (x = 0.03), the maximum positive bipolar strain and unipolar strain are 0.38 and 0.386%, respectively. The corresponding $d^*$$_{33}$ and $d_{33}$ are 767 pm V$^{–1}$ and 158 pC N$^{–1}$, respectively. Meanwhile, the dielectric constant gradually decreases with the increase of the MN content, which flattens the permittivity curves. The large piezoelectric responses are closely associated with the reversible relaxor ferroelectric phase transformation.

    • Author Affiliations

       

      YIXUAN SHEN1 HANG XIE1 YABIN SUN1 JIWEN XU1 LING YANG1 XIAOYI PAN2 CHANGRONG ZHOU1 HUA WANG1

      1. School of Materials Science and Engineering, Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, People’s Republic of China
      2. Guilin Science and Technology Information Research Institute, Guilin 541002, People’s Republic of China
    • Dates

       
  • Bulletin of Materials Science | News

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