TY - JOUR
T1 - Shear-mode piezoelectric properties of modified-(K,Na)NbO3 ceramics for "hard" lead-free materials
AU - Lim, Jong Bong
AU - Zhang, Shujun
AU - Lee, Hyeong Jae
AU - Jeon, Jae Ho
AU - Shrout, Thomas R.
PY - 2010/9
Y1 - 2010/9
N2 - (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 K11 T 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.
AB - (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 K11 T 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.
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U2 - 10.1111/j.1551-2916.2010.03870.x
DO - 10.1111/j.1551-2916.2010.03870.x
M3 - Article
AN - SCOPUS:77956369435
SN - 0002-7820
VL - 93
SP - 2519
EP - 2521
JO - Journal of the American Ceramic Society
JF - Journal of the American Ceramic Society
IS - 9
ER -