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http://dx.doi.org/10.4191/kcers.2017.54.2.03

Mn-Modified PMN-PZT [Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3] Single Crystals for High Power Piezoelectric Transducers  

Oh, Hyun-Taek (R&D Division, Ceracomp Co., Ltd.)
Lee, Jong-Yeb (R&D Division, Ceracomp Co., Ltd.)
Lee, Ho-Yong (Department of Materials Science and Engineering, Sunmoon University)
Publication Information
Journal of the Korean Ceramic Society / v.54, no.2, 2017 , pp. 150-157 More about this Journal
Abstract
Three types of piezoelectric single crystals [PMN-PT (Generation I $[Pb(Mg_{1/3}Nb_{2/3})O_3-PbTiO_3]$), PMN-PZT (Generation II $[Pb(Mg_{1/3}Nb_{2/3})O_3-Pb(Zr,Ti)O_3]$), PMN-PZT-Mn (Generation III)] were grown by the solid-state single crystal growth (SSCG) method, and their dielectric and piezoelectric properties were measured and compared. Compared to (001) PMN-PT and PMN-PZT single crystals, the (001) PMN-PZT-Mn single crystals exhibited a higher transition temperature between the rhombohedral and tetragonal phases ($T_{RT}=144^{\circ}C$), as well as a higher coercive electric field ($E_C=6.3kV/cm$) and internal bias field ($E_I=1.6kV/cm$). The (011) PMN-PZT-Mn single crystals showed the highest coercive electric field ($E_C=7.0kV/cm$), and the highest stability of $E_C$ and $E_I$ during 60 cycles of polarization measurement. These results demonstrate that both Mn doping (for higher electromechanical quality factor ($Q_m$)) and a (011) crystallographic orientation (for higher coercive electric field and stability) are necessary for high power transducer applications of these piezoelectric single crystals. Specifically, the (011) PMN-PZT-Mn single crystal (Gen. III) had the highest potential for application in the fields of SONAR transducers, high intensity focused ultrasound (HIFU), ultrasonic motors, and others.
Keywords
Piezoelectric; Single crystal; PMN-PT; PMN-PZT; Transducer;
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Times Cited By KSCI : 1  (Citation Analysis)
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