Phase Transformation and Tunable Piezoelectric Properties of Lead-Free (Na0.52K0.48−xLix)(Nb1−xySbyTax)O3 System

Authors

  • Ruzhong Zuo,

    Corresponding author
    1. Institute of Electro Ceramics and Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
      †Author to whom correspondence should be addressed. e-mail: piezolab@hfut.edu.cn
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  • Jian Fu,

    1. Institute of Electro Ceramics and Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
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  • Danya Lv

    1. Institute of Electro Ceramics and Devices, School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
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  • S. Zhang—contributing editor

  • This work was financially supported by HFUT RenCai Foundation (No. 103-035006) and a special Program for Excellence Selection “R&D of Novel Lead Free Piezoelectric Ceramics” (No. 103-035034). The Project was Sponsored by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

†Author to whom correspondence should be addressed. e-mail: piezolab@hfut.edu.cn

Abstract

Lead-free (Na0.52K0.48−x)(Nb1−xySby)O3-xLiTaO3 (NKNS–LT) piezoelectric ceramics have been fabricated by ordinary sintering. A special attention was paid to the composition design through which the dielectric and piezoelectric properties of the (Li, Ta, Sb) modified NKN systems were significantly promoted. A property spectrum was generated with a particular discussion on the relationship between the Sb content, the LT content, the polymorphic phase transition, and the electrical properties and their temperature stability. Excellent and tunable electrical properties of d33=242–400 pC/N, kp=36%–54%, inline image, and Tc=230°–430°C demonstrate a tremendous potential of the compositions studied for device applications.

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