Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)–0.035LiTaO3 Lead-Free Piezoelectric Ceramics

Authors

  • Yan Kang,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
    Search for more papers by this author
    • Present address: Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853.

  • Yuzhen Zhao,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
    Search for more papers by this author
  • Rongxia Huang,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
    Search for more papers by this author
  • Yongjie Zhao,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
    Search for more papers by this author
  • Heping Zhou

    Corresponding author
    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
      †Author to whom correspondence should be addressed. e-mail: zhp-dms@mail.tsinghua.edu.cn
    Search for more papers by this author

Errata

This article is corrected by:

  1. Errata: Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)–0.035LiTaO3 Lead-Free Piezoelectric Ceramics Volume 95, Issue 1, 443, Article first published online: 6 December 2011

  • D. Lin—contributing editor

  • This work was financially supported by National Natural Science Foundation of China. (Grant No. 50972073).

†Author to whom correspondence should be addressed. e-mail: zhp-dms@mail.tsinghua.edu.cn

Abstract

(NaxKy) (Nb0.885Sb0.08)–0.035LiTaO3 lead-free piezoelectric ceramics (NxKyNS–LT) with an excessive amount of Na or K were synthesized by conventional solid-state processes. Effects of Na/K ratio on structure and electrical properties of NxKyNS–LT ceramics were investigated. Excessive Na or K did not change the major crystal structure and barely influenced the sintering temperature, but excessive Na or K exhibited effects on grain size. Better piezoelectric properties of the ceramics were achieved when a certain amount of excessive K was added (the Na/K ratio before calcining was adjusted to 0.520:0.450). X-Ray fluorescence was used to examine the cause, and the enhanced properties are attributed to the formation of an MPB-like composition when the Na/K was changed. Specimens with properties of d33=183 pC/N, kp=0.33, Qm=103 were obtained in this work.

Ancillary