한국전기전자재료학회:학술대회논문집 (Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference)
- 한국전기전자재료학회 2010년도 하계학술대회 논문집
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- Pages.302-302
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- 2010
Nb 변화에 따른 KNN 세라믹스의 압전 및 전기적 특성
Piezoelectric and Electrical properties of KNN ceramics as a function of the Variation of Nb
- Lee, Kba-Soo (Semyung University) ;
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Yoo, Ju-Hyun
(Semyung University) ;
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Kim, In-Sung
(KERI) ;
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Song, Jae-Sung
(KER)
- 발행 : 2010.06.16
초록
The lead-free piezoelectric ceramics must have high piezoelectric properties and electrical properties for the applications of piezoelectric devices. Therefore, KNN ceramics were investigated as a function of the variation of Nb. The density was increased with the increase of Nb. The density was saturated above 0.8895 mol Nb. The maximum value of electromechanical coupling coefficient(kp) was obtained 0.428 at 0.8895mol Nb. This result can be attributed to the well sintered of specimens. Also, The maximum value of mechanical quality factor(Qm) showed 1554 at 0.8895mol Nb. Therefore, this composition can be used for application of piezoelectric device such as piezoelectric transformer and piezoelectric actuator.