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Shear-mode piezoelectric properties of modified-(K,Na)NbO3 ceramics for "hard" lead-free materials

Journal Article


Abstract


  • (K0.45Na0.55)NbO3-0.5 mol% K 4CuNb8O23 [KNN-KCN] solid solution was synthesized and its shear mode dielectric and piezoelectric properties were characterized as a function of temperature. The doped KNN material was found to possess comparable electric resistivity, piezoelectric, and electromechanical properties with pure KNN, but with a much higher mechanical Qm value, being on the order of 1500. The dielectric permittivity K11T and piezoelectric coefficients d15 for KNN-KCN were found to increase with the increasing temperature, while the electromechanical coupling factors k15 maintain a similar value till the phase transition temperature (To-t���200��C), above which, the properties drop significantly due to depolarization. The good temperature-dependent properties, together with its high mechanical Q m, demonstrate a practical potential of KNN-KCN materials for high power shear-mode applications. �� 2010 The American Ceramic Society.

Publication Date


  • 2010

Citation


  • Lim, J. B., Zhang, S., Lee, H. J., Jeon, J. H., & Shrout, T. R. (2010). Shear-mode piezoelectric properties of modified-(K,Na)NbO3 ceramics for "hard" lead-free materials. Journal of the American Ceramic Society, 93(9), 2519-2521. doi:10.1111/j.1551-2916.2010.03870.x

Scopus Eid


  • 2-s2.0-77956369435

Start Page


  • 2519

End Page


  • 2521

Volume


  • 93

Issue


  • 9

Place Of Publication


Abstract


  • (K0.45Na0.55)NbO3-0.5 mol% K 4CuNb8O23 [KNN-KCN] solid solution was synthesized and its shear mode dielectric and piezoelectric properties were characterized as a function of temperature. The doped KNN material was found to possess comparable electric resistivity, piezoelectric, and electromechanical properties with pure KNN, but with a much higher mechanical Qm value, being on the order of 1500. The dielectric permittivity K11T and piezoelectric coefficients d15 for KNN-KCN were found to increase with the increasing temperature, while the electromechanical coupling factors k15 maintain a similar value till the phase transition temperature (To-t���200��C), above which, the properties drop significantly due to depolarization. The good temperature-dependent properties, together with its high mechanical Q m, demonstrate a practical potential of KNN-KCN materials for high power shear-mode applications. �� 2010 The American Ceramic Society.

Publication Date


  • 2010

Citation


  • Lim, J. B., Zhang, S., Lee, H. J., Jeon, J. H., & Shrout, T. R. (2010). Shear-mode piezoelectric properties of modified-(K,Na)NbO3 ceramics for "hard" lead-free materials. Journal of the American Ceramic Society, 93(9), 2519-2521. doi:10.1111/j.1551-2916.2010.03870.x

Scopus Eid


  • 2-s2.0-77956369435

Start Page


  • 2519

End Page


  • 2521

Volume


  • 93

Issue


  • 9

Place Of Publication