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CuO 첨가에 따른 (Na,K,Li)(Nb,Sb,Ta)O<sub>3</sub> 세라믹스의 유전 및 압전 특성
이갑수,김유석,류주현,마석범,Lee, KabSoo,Kim, YouSeok,Yoo, JuHyun,Mah, Sukbum 한국전기전자재료학회 2014 전기전자재료학회논문지 Vol.27 No.10
$(Na_{0.525}K_{0.4425}Li_{0.0375})(Nb_{0.9975}Sb_{0.065}Ta_{0.0375})O_3+0.3 wt%CoO$ 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.
이갑수(Kabsoo Lee),이일하(Ilha Lee),류주현(Juhyun Yoo) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
In this paper, multilayer piezoelectric actuator was fabricated in order to develop ultrasonic linear motor. Multilayer actuator showed a high density of 7.78[g/㎤], a large effective electromechanical coupling factor(k<SUB>eff</SUB>) of 0.259, a high mechanical quality factor(Qm') of 1301, and high capacitance(c) of 19.32[㎋l Curie temperature was 343[℃]