DOI QR코드

DOI QR Code

Microstructure and Piezoelectric Properties of Low Temperature Sintering (Na,K,Li)(Nb,Sb,Ta)O3 Ceramics

저온소결 (Na,K,Li)(Nb,Sb,Ta)O3계 세라믹스의 미세구조 및 압전특성

  • Received : 2016.02.10
  • Accepted : 2016.03.08
  • Published : 2016.04.01

Abstract

In this paper, piezoelectric ceramics with the composition of $(Na_{0.525}K_{0.4425}Li_{0.0375})(Nb_{0.8975}Sb_{0.065}Ta_{0.0375})O_3+0.3wt%\;CoO+x\;CuO$ ($0.005{\leq}x{\leq}0.025$) (abbreviated to NKL-NST) were fabricated for ultrasonic sensor application. The effects of CuO addition and sintering on the microstructure and the piezoelectric properties of the NKL-NST ceramics were systematically studied. Excellent piezoelectric properties such as electromchanical coupling $factor(k_p)=0.415$, piezoelectric constant $(d_{33})=166pC/N$ and piezoelectric figure of merit $d_{{33}*}g_{33}=5.47pm^2/N$ were obtained from the 2.5 mol% CuO doped NKL-NST+0.3 wt%CoO ceramics sintered at $1,000^{\circ}C$ for 3 h.

Keywords

CuO;Lead-free piezoelectric;NKN

References

  1. Y. H. Lee, D. H. Kim, J. H. Yoo, I. S. Kim, J. S. Song, and J. I. Hong, J. Korean Inst. Electr. Electron. Mater. Eng., 22, 489, (2009).
  2. B. H. Seo and J. H. Yoo, J. Korean Inst. Electr. Electron. Mater. Eng., 23, 617 (2010).
  3. S. J. Park, H. Y. Park, K. H. Cho, S. Nahm, H. G. Lee, D. H. Kim, and B. H. Choi, Mater. Res. Bull., 43, 3580 (2008). [DOI: http://dx.doi.org/10.1016/j.materresbull.2008.01.015] https://doi.org/10.1016/j.materresbull.2008.01.015

Acknowledgement

Supported by : 세명대학교