Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics

Cristina Pascual-Gonzalez; Giorgio Schileo; Amir Khesro; Iasmi Sterianou; Dawei Wang; Ian M. Reaney; Antonio Feteira

doi:10.1039/c6tc05515j

Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ ceramics

Cristina Pascual-Gonzalez
, Giorgio Schileo
, Amir Khesro
, Iasmi Sterianou
, Dawei Wang
, Ian M. Reaney
, Antonio Feteira^*

^*Corresponding author for this work

Sheffield Hallam University
University of Sheffield

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

42 Scopus citations

Abstract

The band gap of (1 − x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ (0 ≤ x ≤ 0.25) ceramics narrows slightly from 3.22 eV for x = 0 to 2.89 eV for x = 0.25, in broad agreement with first-principles calculations [Phys. Rev. B, 2014, 89, 235105]. In addition, an unreported piezoelectric-to-electrostrictive crossover is observed in this compositional range, which is accompanied by a continuous decrease of the maximum electric field-induced strain due to the presence of a non-ferroelectric phase. An electrostriction coefficient of 0.023 m⁴ C⁻² is measured for x = 0.05, whilst no electromechanical response is observed for non-ferroelectric x = 0.25,

Original language	English
Pages (from-to)	1990-1996
Number of pages	7
Journal	Journal of Materials Chemistry C
Volume	5
Issue number	8
DOIs	https://doi.org/10.1039/c6tc05515j
State	Published - 2017
Externally published	Yes

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@article{aac9622dd36c4dae9cab1d04d0a0dd4b,

title = "Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics",

abstract = "The band gap of (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 (0 ≤ x ≤ 0.25) ceramics narrows slightly from 3.22 eV for x = 0 to 2.89 eV for x = 0.25, in broad agreement with first-principles calculations [Phys. Rev. B, 2014, 89, 235105]. In addition, an unreported piezoelectric-to-electrostrictive crossover is observed in this compositional range, which is accompanied by a continuous decrease of the maximum electric field-induced strain due to the presence of a non-ferroelectric phase. An electrostriction coefficient of 0.023 m4 C−2 is measured for x = 0.05, whilst no electromechanical response is observed for non-ferroelectric x = 0.25,",

author = "Cristina Pascual-Gonzalez and Giorgio Schileo and Amir Khesro and Iasmi Sterianou and Dawei Wang and Reaney, \{Ian M.\} and Antonio Feteira",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c6tc05515j",

language = "英语",

volume = "5",

pages = "1990--1996",

journal = "Journal of Materials Chemistry C",

issn = "2050-7526",

publisher = "Royal Society of Chemistry",

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TY - JOUR

T1 - Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics

AU - Pascual-Gonzalez, Cristina

AU - Schileo, Giorgio

AU - Khesro, Amir

AU - Sterianou, Iasmi

AU - Wang, Dawei

AU - Reaney, Ian M.

AU - Feteira, Antonio

PY - 2017

Y1 - 2017

N2 - The band gap of (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 (0 ≤ x ≤ 0.25) ceramics narrows slightly from 3.22 eV for x = 0 to 2.89 eV for x = 0.25, in broad agreement with first-principles calculations [Phys. Rev. B, 2014, 89, 235105]. In addition, an unreported piezoelectric-to-electrostrictive crossover is observed in this compositional range, which is accompanied by a continuous decrease of the maximum electric field-induced strain due to the presence of a non-ferroelectric phase. An electrostriction coefficient of 0.023 m4 C−2 is measured for x = 0.05, whilst no electromechanical response is observed for non-ferroelectric x = 0.25,

AB - The band gap of (1 − x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 (0 ≤ x ≤ 0.25) ceramics narrows slightly from 3.22 eV for x = 0 to 2.89 eV for x = 0.25, in broad agreement with first-principles calculations [Phys. Rev. B, 2014, 89, 235105]. In addition, an unreported piezoelectric-to-electrostrictive crossover is observed in this compositional range, which is accompanied by a continuous decrease of the maximum electric field-induced strain due to the presence of a non-ferroelectric phase. An electrostriction coefficient of 0.023 m4 C−2 is measured for x = 0.05, whilst no electromechanical response is observed for non-ferroelectric x = 0.25,

UR - https://www.scopus.com/pages/publications/85014054746

U2 - 10.1039/c6tc05515j

DO - 10.1039/c6tc05515j

M3 - 文章

AN - SCOPUS:85014054746

SN - 2050-7526

VL - 5

SP - 1990

EP - 1996

JO - Journal of Materials Chemistry C

JF - Journal of Materials Chemistry C

IS - 8

ER -

Band gap evolution and a piezoelectric-to-electrostrictive crossover in (1 − x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ ceramics

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