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http://dx.doi.org/10.4313/JKEM.2018.31.4.216

Piezoelectric Properties of 0.65Pb(Zr1-xTix)O3-0.35Pb(Zn1/6Ni1/6Nb2/3)O3 Ceramics and Their Application to Piezoelectric Energy Harvester  

Jo, Sora (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Kim, Daesu (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Cho, Yuri (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Son, Sin Joong (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Kang, Hyung-Won (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
Han, Seung Ho (Electronic Convergence Materials & Device Research Center, Korea Electronics Technology Institute)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.31, no.4, 2018 , pp. 216-220 More about this Journal
Abstract
The piezoelectric properties of $0.65Pb(Zr_{1-x}Ti_x)O_3-0.35Pb(Zn_{1/6}Ni_{1/6}Nb_{2/3})O_3$ ($PZT_x-PZNN$) ceramics with $0.530{\leq}x{\leq}0.555$ were investigated for application to piezoelectric energy harvesters. Although a morphotropic phase boundary (MPB) was found at approximately x = 0.545, the ceramic with the highest figure of merit (FOM) ($d_{33}{\times}g_{33}$) was observed at a composition of x = 0.540. Values of this figure of merit, $d_{33}{\times}g_{33}$, of $19.6pm^2/N$ and $20.2pm^2/N$ were obtained from $PZT_{0.540}-PZNN$ ceramics sintered at $920^{\circ}C$ and $950^{\circ}C$, respectively. A high output power of $937{\mu}W$ and a high power density of $3.3mW/cm^3$ were obtained from unimorph-type piezoelectric energy harvesters fabricated using $PZT_{0.540}-PZNN$ ceramic sintered at $920^{\circ}C$ for 4h.
Keywords
PZT-PZNN; Piezoelectric energy harvester; Piezoelectric properties; Figure of merit;
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