Relaxor-PT single crystals: Observations and developments

Shujun Zhang; Thomas R. Shrout

doi:10.1109/TUFFC.2010.1670

Relaxor-PT single crystals: Observations and developments

Shujun Zhang
, Thomas R. Shrout

Materials Research Institute (MRI)

Research output: Contribution to journal › Article › peer-review

173 Scopus citations

Abstract

Relaxor-PT based ferroelectric single crystals Pb(Zn_1/3Nb _2/3)O₃-PbTiO₃ (PZNT) and Pb(Mg _1/3Nb_2/3)O₃-PbTiO₃ (PMNT) offer high performance with ultra-high electromechanical coupling factors k33s > 0.9 and piezoelectric coefficients d33s > 1500 pC/N. However, the usage temperature range of these perovskite single crystals is limited by T _RT-the rhombohedral to tetragonal phase transition temperature, which occurs at significantly lower temperatures than the Curie temperature T _C, a consequence of curved morphotropic phase boundaries (MPBs). Furthermore, these ←001→-oriented crystals exhibit low mechanical quality Q and coercive fields, restricting their usage in high-power applications. In this survey, recent developments on binary and ternary perovskite relaxor-PT crystal systems are reviewed with respect to their temperature usage range. General trends of dielectric and piezoelectric properties of relaxor-PT crystal systems are discussed in relation to their respective T_C/T_RT. In addition, two approaches have been implemented to improve mechanical Q, including acceptor dopants, analogous to hard polycrystalline ceramics, and anisotropic domain engineering, enabling lowloss crystals with high coupling for high-power applications.

Original language	English (US)
Article number	5587391
Pages (from-to)	2138-2146
Number of pages	9
Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume	57
Issue number	10
DOIs	https://doi.org/10.1109/TUFFC.2010.1670
State	Published - Oct 2010

All Science Journal Classification (ASJC) codes

Instrumentation
Acoustics and Ultrasonics
Electrical and Electronic Engineering

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10.1109/TUFFC.2010.1670

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title = "Relaxor-PT single crystals: Observations and developments",

abstract = "Relaxor-PT based ferroelectric single crystals Pb(Zn1/3Nb 2/3)O3-PbTiO3 (PZNT) and Pb(Mg 1/3Nb2/3)O3-PbTiO3 (PMNT) offer high performance with ultra-high electromechanical coupling factors k33s > 0.9 and piezoelectric coefficients d33s > 1500 pC/N. However, the usage temperature range of these perovskite single crystals is limited by T RT-the rhombohedral to tetragonal phase transition temperature, which occurs at significantly lower temperatures than the Curie temperature T C, a consequence of curved morphotropic phase boundaries (MPBs). Furthermore, these ←001→-oriented crystals exhibit low mechanical quality Q and coercive fields, restricting their usage in high-power applications. In this survey, recent developments on binary and ternary perovskite relaxor-PT crystal systems are reviewed with respect to their temperature usage range. General trends of dielectric and piezoelectric properties of relaxor-PT crystal systems are discussed in relation to their respective TC/TRT. In addition, two approaches have been implemented to improve mechanical Q, including acceptor dopants, analogous to hard polycrystalline ceramics, and anisotropic domain engineering, enabling lowloss crystals with high coupling for high-power applications.",

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note = "Funding Information: Manuscript received January 7, 2010; accepted april 7, 2010. This work was supported by the national Institutes of Health under Grant no. P41-Eb21820 and office of naval research under Grant no. n00014-09-1-01456, n-00014-07-c-0858. The authors are with the Materials research Institute, The Pennsylvania state University, University Park, Pa (e-mail: [email protected]). digital object Identifier 10.1109/TUFFc.2010.1670",

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Relaxor-PT single crystals: Observations and developments

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