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http://dx.doi.org/10.4313/JKEM.2014.27.10.630

Dielectric and Piezoelectric Properties of (Na,K,Li)(Nb,Sb,Ta)O3 Ceramics as a Function of CuO Addition  

Lee, KabSoo (Department of Electrical Engineering, Semyung University)
Kim, YouSeok (Department of Electrical Engineering, Semyung University)
Yoo, JuHyun (Department of Electrical Engineering, Semyung University)
Mah, Sukbum (Department of Lighting and Interior Design, Yong-in Songdam College)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.27, no.10, 2014 , pp. 630-634 More about this Journal
Abstract
$(Na_{0.525}K_{0.4425}Li_{0.0375})(Nb_{0.9975}Sb_{0.065}Ta_{0.0375})O_3+0.3 wt%CoO$ ceramics were fabricated as a function of CuO addition by traditional solid state sintering process in order to develop excellent lead-free piezoelectric ceramics composition. The addition of CuO in the LNKNTS composition ceramics can effectively enhance the densification of the ceramics, resulting in the oxygen vacancies as hardening effect. The excellent piezoelectric properties of electromechanical coupling factor($k{\small}_P$) of 0.378, piezoelectric constant($d_{33}$) of 152 pC/N were obtained from the 1.0 mol% CuO doped LNKNTS ceramics sintered at $1,020^{\circ}C$ for 3 h.
Keywords
Lead-free ceramics; CuO; Hardening effect; Piezoelectric properties;
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