Frontiers in Materials (May 2021)

Enhanced Electrical Properties of Lead-Free Piezoelectric KNLN-BZ-BNT Ceramics With the Modification of Sm3+ Ions

  • Yi Quan,
  • Lingyan Wang,
  • Wei Ren,
  • Jinyan Zhao,
  • Jian Zhuang,
  • Kun Zheng,
  • Zhe Wang,
  • Tomoaki Karaki,
  • Zhishui Jiang,
  • Li Wen

DOI
https://doi.org/10.3389/fmats.2021.695330
Journal volume & issue
Vol. 8

Abstract

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Environment-friendly lead-free piezoelectric ceramics with great properties and high thermal stability are desired in the industry. In this work, the Sm3+-modified lead-free 0.915(K0.45Na0.5Li0.05)NbO3–0.075BaZrO3–0.01(Bi0.5Na0.5)TiO3 (KNLN-BZ-BNT) ceramics are prepared. The piezoelectric properties are improved with the introduction of Sm3+, and the optimal properties (d33 = 325 pC/N and d33* = 384 pm/V) are achieved in the ceramic modified with 0.3 mol% Sm3+ ions. Meanwhile, this sample shows good thermal stability such that the values of d33* decreased less than 20% when the temperature raised from 30 to 180oC. These results show the Sm3+-modified KNLN-BZ-BNT ceramics are good for further applications even under high temperature.

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