한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제21권11호
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  • Pages.1000-1004
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  • 2008
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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저온소결 (K0.5Na0.5)NbO3 세라믹스의 분극전계에 따른 압전 및 유전특성

Piezoelectric and Dielectric Properties of Low Temperature Sintering (K0.5Na0.5)NbO3 Ceramics with the Variation of Poling Electric Field

  • 발행 : 2008.11.01
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초록

In this paper, the influences of poling electric field on piezoelectric properties of $0.95(K_{0.5}Na_{0.5})NbO_3$-$0.05Li(Sb_{0.8}Nb_{0.2})O_3$ (abbreviated as KNN-LSN) ceramics were investigated. The specimens was sintered at sintering temperature of $1050^{\circ}C$. They showed orthorhombic phase structure without secondary phase. Electromechanical coupling factor (kp), dielectric and piezoelectric constant($d_{33}$) increased with poling electric field. However, mechanical quality factor (Qm) decreased. Take into account of poling conditions and piezoelectric properties of KNN-LSN ceramics, the optimum poling condition for KNN-LSN ceramics was poling electric field of 4.5 kV/mm. At the time, kp of 0.458, Qm of 43.97, $d_{33}$ of 278 pC/N, and dielectric constant of 1079 were shown, respectively.

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참고문헌

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