Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K0.5Na 0.5)1-xLixNbO3 textured ceramics

Wenwei Ge; Jiefang Li; D. Viehland; Yunfei Chang; Gary L. Messing

doi:10.1103/PhysRevB.83.224110

Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K_0.5Na _0.5)_1-xLi_xNbO₃ textured ceramics

Wenwei Ge, Jiefang Li, D. Viehland, Yunfei Chang, Gary L. Messing

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

65 Scopus citations

Abstract

The structure, ferroelectric and piezoelectric properties of 001 textured (K_0.5Na_0.5)_0.98Li_0.02NbO ₃ ceramics were investigated as a function of temperature and dc bias E. X-ray diffraction revealed an orthorhombic (O) → tetragonal (T) polymorphic phase boundary (PPB). Phase coexistence was found near the PPB over a 30 °C temperature range, where the relative phase volume fractions changed with temperature. Furthermore, increasing E applied along the 001 texture direction resulted in a notable increase in the volume fraction of the T phase at the expense of the O phase, effectively shifting the O → T boundary to lower temperature. An enhancement in the piezoelectric properties was found to accompany this increase in the T volume fraction.

Original language	English (US)
Article number	224110
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	83
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.83.224110
State	Published - Jun 24 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.83.224110

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title = "Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K0.5Na 0.5)1-xLixNbO3 textured ceramics",

abstract = "The structure, ferroelectric and piezoelectric properties of 001 textured (K0.5Na0.5)0.98Li0.02NbO 3 ceramics were investigated as a function of temperature and dc bias E. X-ray diffraction revealed an orthorhombic (O) → tetragonal (T) polymorphic phase boundary (PPB). Phase coexistence was found near the PPB over a 30 °C temperature range, where the relative phase volume fractions changed with temperature. Furthermore, increasing E applied along the 001 texture direction resulted in a notable increase in the volume fraction of the T phase at the expense of the O phase, effectively shifting the O → T boundary to lower temperature. An enhancement in the piezoelectric properties was found to accompany this increase in the T volume fraction.",

author = "Wenwei Ge and Jiefang Li and D. Viehland and Yunfei Chang and Messing, {Gary L.}",

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language = "English (US)",

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Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K_0.5Na _0.5)_1-xLi_xNbO₃ textured ceramics. / Ge, Wenwei; Li, Jiefang; Viehland, D. et al.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 83, No. 22, 224110, 24.06.2011.

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

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T1 - Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K0.5Na 0.5)1-xLixNbO3 textured ceramics

AU - Ge, Wenwei

AU - Li, Jiefang

AU - Viehland, D.

AU - Chang, Yunfei

AU - Messing, Gary L.

PY - 2011/6/24

Y1 - 2011/6/24

N2 - The structure, ferroelectric and piezoelectric properties of 001 textured (K0.5Na0.5)0.98Li0.02NbO 3 ceramics were investigated as a function of temperature and dc bias E. X-ray diffraction revealed an orthorhombic (O) → tetragonal (T) polymorphic phase boundary (PPB). Phase coexistence was found near the PPB over a 30 °C temperature range, where the relative phase volume fractions changed with temperature. Furthermore, increasing E applied along the 001 texture direction resulted in a notable increase in the volume fraction of the T phase at the expense of the O phase, effectively shifting the O → T boundary to lower temperature. An enhancement in the piezoelectric properties was found to accompany this increase in the T volume fraction.

AB - The structure, ferroelectric and piezoelectric properties of 001 textured (K0.5Na0.5)0.98Li0.02NbO 3 ceramics were investigated as a function of temperature and dc bias E. X-ray diffraction revealed an orthorhombic (O) → tetragonal (T) polymorphic phase boundary (PPB). Phase coexistence was found near the PPB over a 30 °C temperature range, where the relative phase volume fractions changed with temperature. Furthermore, increasing E applied along the 001 texture direction resulted in a notable increase in the volume fraction of the T phase at the expense of the O phase, effectively shifting the O → T boundary to lower temperature. An enhancement in the piezoelectric properties was found to accompany this increase in the T volume fraction.

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Electric-field-dependent phase volume fractions and enhanced piezoelectricity near the polymorphic phase boundary of (K_0.5Na _0.5)_1-xLi_xNbO₃ textured ceramics

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