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http://dx.doi.org/10.4313/JKEM.2016.29.4.205

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

Lee, Kab-Soo (Yeongwol Eco-Materials Industry Foundation)
Yoo, Ju-Hyun (Department of Electrical Engineering, Semyung University)
Lee, Jie-Young (Department of Computer Science, Semyung University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.29, no.4, 2016 , pp. 205-209 More about this Journal
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;
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