Microstructural origin for the piezoelectricity evolution in (K 0.5Na0.5)NbO3-based lead-free ceramics

Hanzheng Guo; Shujun Zhang; Scott P. Beckman; Xiaoli Tan

doi:10.1063/1.4825213

Microstructural origin for the piezoelectricity evolution in (K _0.5Na_0.5)NbO₃-based lead-free ceramics

Hanzheng Guo, Shujun Zhang, Scott P. Beckman, Xiaoli Tan

Materials Research Institute (MRI)

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

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Abstract

Chemically modified (K_0.5Na_0.5)NbO₃ compositions with finely tuned polymorphic phase boundaries (PPBs) have shown excellent piezoelectric properties. The evolution of the domain morphology and crystal structure under applied electric fields of a model material, 0.948(K_0.5Na_0.5)NbO₃-0.052LiSbO₃, was directly visualized using in situ transmission electron microscopy. The in situ observations correlate extremely well with measurements of the electromechanical response on bulk samples. It is found that the origin of the excellent piezoelectric performance in this lead-free composition is due to a tilted monoclinic phase that emerges from the PPB when poling fields greater than 14 kV/cm are applied.

Original language	English (US)
Article number	154102
Journal	Journal of Applied Physics
Volume	114
Issue number	15
DOIs	https://doi.org/10.1063/1.4825213
State	Published - Oct 21 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1063/1.4825213

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title = "Microstructural origin for the piezoelectricity evolution in (K 0.5Na0.5)NbO3-based lead-free ceramics",

abstract = "Chemically modified (K0.5Na0.5)NbO3 compositions with finely tuned polymorphic phase boundaries (PPBs) have shown excellent piezoelectric properties. The evolution of the domain morphology and crystal structure under applied electric fields of a model material, 0.948(K0.5Na0.5)NbO3-0.052LiSbO3, was directly visualized using in situ transmission electron microscopy. The in situ observations correlate extremely well with measurements of the electromechanical response on bulk samples. It is found that the origin of the excellent piezoelectric performance in this lead-free composition is due to a tilted monoclinic phase that emerges from the PPB when poling fields greater than 14 kV/cm are applied.",

author = "Hanzheng Guo and Shujun Zhang and Beckman, {Scott P.} and Xiaoli Tan",

note = "Funding Information: X.T. acknowledges Dr. Ian Reaney and Dr. Jacob Jones for their critical review and helpful discussion. The National Science Foundation (NSF), through Grant No. DMR-1037898, supported this work. TEM experiments were performed at the Ames Laboratory, which is operated for the U.S. DOE by Iowa State University under Contract No. DE-AC02-07CH11358.",

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doi = "10.1063/1.4825213",

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AU - Guo, Hanzheng

AU - Zhang, Shujun

AU - Beckman, Scott P.

AU - Tan, Xiaoli

N1 - Funding Information: X.T. acknowledges Dr. Ian Reaney and Dr. Jacob Jones for their critical review and helpful discussion. The National Science Foundation (NSF), through Grant No. DMR-1037898, supported this work. TEM experiments were performed at the Ames Laboratory, which is operated for the U.S. DOE by Iowa State University under Contract No. DE-AC02-07CH11358.

PY - 2013/10/21

Y1 - 2013/10/21

N2 - Chemically modified (K0.5Na0.5)NbO3 compositions with finely tuned polymorphic phase boundaries (PPBs) have shown excellent piezoelectric properties. The evolution of the domain morphology and crystal structure under applied electric fields of a model material, 0.948(K0.5Na0.5)NbO3-0.052LiSbO3, was directly visualized using in situ transmission electron microscopy. The in situ observations correlate extremely well with measurements of the electromechanical response on bulk samples. It is found that the origin of the excellent piezoelectric performance in this lead-free composition is due to a tilted monoclinic phase that emerges from the PPB when poling fields greater than 14 kV/cm are applied.

AB - Chemically modified (K0.5Na0.5)NbO3 compositions with finely tuned polymorphic phase boundaries (PPBs) have shown excellent piezoelectric properties. The evolution of the domain morphology and crystal structure under applied electric fields of a model material, 0.948(K0.5Na0.5)NbO3-0.052LiSbO3, was directly visualized using in situ transmission electron microscopy. The in situ observations correlate extremely well with measurements of the electromechanical response on bulk samples. It is found that the origin of the excellent piezoelectric performance in this lead-free composition is due to a tilted monoclinic phase that emerges from the PPB when poling fields greater than 14 kV/cm are applied.

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Microstructural origin for the piezoelectricity evolution in (K _0.5Na_0.5)NbO₃-based lead-free ceramics

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