‡Present address: Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853.
Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)–0.035LiTaO3 Lead-Free Piezoelectric Ceramics
Article first published online: 27 APR 2011
© 2011 The American Ceramic Society
Journal of the American Ceramic Society
Volume 94, Issue 6, pages 1683–1686, June 2011
How to Cite
Kang, Y., Zhao, Y., Huang, R., Zhao, Y. and Zhou, H. (2011), Effect of Changing Na/K Ratio on Structure and Electrical Properties of (NaxKy) (Nb0.885Sb0.08)–0.035LiTaO3 Lead-Free Piezoelectric Ceramics. Journal of the American Ceramic Society, 94: 1683–1686. doi: 10.1111/j.1551-2916.2011.04558.x
D. Lin—contributing editor
This work was financially supported by National Natural Science Foundation of China. (Grant No. 50972073).
- Issue published online: 7 JUN 2011
- Article first published online: 27 APR 2011
- Manuscript No. 28980. Received November 28, 2010; approved March 7, 2011.
Vol. 95, Issue 1, 443, Article first published online: 6 DEC 2011
(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.