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http://dx.doi.org/10.4313/JKEM.2018.31.1.19

The Effects of PZT Ratio and Sr Doping on the Piezoelectric Properties in PZN-PNN-PZT  

Choi, Jeoung Sik (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Chang Hyun (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Shin, Hyo Soon (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Yeo, Dong Hun (Electronic Convergence Materials Division, Korea Institute of Ceramic Engineering and Technology)
Lee, Joon Hyung (Department of Materials Science and Engineering, Kyungpook National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.31, no.1, 2018 , pp. 19-23 More about this Journal
Abstract
In a Pb-included piezoelectric composition, $Sr_yPb_{1-y}[(Zn_{1/3}Nb_{2/3})_x-(Ni_{1/3}Nb_{2/3})_{0.2}-(Zr_{0.46}Ti_{0.54})_{0.8-x}]O_3$ was selected in order to attain high piezoelectric properties. According to the PZN ratio (x) and the amount of Sr doping (y), the crystal structure, microstructure and piezoelectric properties were measured and evaluated. In the case of Sr 4 mol% doping, the piezoelectric properties were the highest for a PZN ratio of 0.1. In this condition, the grain size was larger and the intensity was higher. With the PZN ratio fixed and varying the Sr doping, the piezoelectric properties increased until 10 mol% doping and then decreased for over 12 mol% doping. In the case of x＝0.1 and y＝10 mol%, the best piezoelectric properties were obtained, i.e., $d_{33}=660pC/N$ and $k_p=68.5%$, and these values seem to be related to the grain size and crystal structure.
Keywords
PZN-PNN-PZT; Doping; Piezoelectric; Perovskite;
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