Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics

Amir Ullah; Rizwan Ahmed Malik; Aman Ullah; Dae Su Lee; Soon Jong Jeong; Jae Shin Lee; Ill Won Kim; Chang Won Ahn

doi:10.1016/j.jeurceramsoc.2013.07.014

Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics

Amir Ullah, Rizwan Ahmed Malik, Aman Ullah, Dae Su Lee, Soon Jong Jeong, Jae Shin Lee, Ill Won Kim, Chang Won Ahn

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

127 Scopus citations

Abstract

A suite of Nb-based piezoelectric ceramics of 0.99[Bi_0.5(Na_0.4K_0.1)(Ti_1-xNb_x)]O₃-0.01(Ba_0.7Sr_0.3)TiO₃(BNKTN-BST), with x ranging from 0 to 0.030, was prepared by a conventional solid-state reaction method. X-ray diffraction patterns confirmed a single perovskite phase and the tetragonality was found to decrease with increasing Nb ratio. The BNKTN-BST ceramic had a high field-induced normalized strain coefficient of 634pm/V at 2mol% Nb content with a relatively small hysteresis compared with existing lead-free Bi-perovskite ceramics. An electric-field-dependent X-ray study was conducted to identify the main source of the high strain and ascertain the effect of electric fields on the crystal structure. The temperature-dependent P-E hysteresis loops of the BNKTN-BST ceramics were measured under an electric field of 60kV/cm at various temperatures, and the effect of temperature on the ferroelectricity is discussed.

Original language	English
Pages (from-to)	29-35
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2013.07.014
State	Published - Jan 2014
Externally published	Yes

Keywords

Bismuth sodium potassium titanate ceramics
Lead-free
Phase transition
Piezoelectrics
Strain

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10.1016/j.jeurceramsoc.2013.07.014

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title = "Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics",

abstract = "A suite of Nb-based piezoelectric ceramics of 0.99[Bi0.5(Na0.4K0.1)(Ti1-xNbx)]O3-0.01(Ba0.7Sr0.3)TiO3(BNKTN-BST), with x ranging from 0 to 0.030, was prepared by a conventional solid-state reaction method. X-ray diffraction patterns confirmed a single perovskite phase and the tetragonality was found to decrease with increasing Nb ratio. The BNKTN-BST ceramic had a high field-induced normalized strain coefficient of 634pm/V at 2mol\% Nb content with a relatively small hysteresis compared with existing lead-free Bi-perovskite ceramics. An electric-field-dependent X-ray study was conducted to identify the main source of the high strain and ascertain the effect of electric fields on the crystal structure. The temperature-dependent P-E hysteresis loops of the BNKTN-BST ceramics were measured under an electric field of 60kV/cm at various temperatures, and the effect of temperature on the ferroelectricity is discussed.",

keywords = "Bismuth sodium potassium titanate ceramics, Lead-free, Phase transition, Piezoelectrics, Strain",

author = "Amir Ullah and Malik, \{Rizwan Ahmed\} and Aman Ullah and Lee, \{Dae Su\} and Jeong, \{Soon Jong\} and Lee, \{Jae Shin\} and Kim, \{Ill Won\} and Ahn, \{Chang Won\}",

year = "2014",

month = jan,

doi = "10.1016/j.jeurceramsoc.2013.07.014",

language = "English",

volume = "34",

pages = "29--35",

journal = "Journal of the European Ceramic Society",

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publisher = "Elsevier B.V.",

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T1 - Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics

AU - Ullah, Amir

AU - Malik, Rizwan Ahmed

AU - Ullah, Aman

AU - Lee, Dae Su

AU - Jeong, Soon Jong

AU - Lee, Jae Shin

AU - Kim, Ill Won

AU - Ahn, Chang Won

PY - 2014/1

Y1 - 2014/1

N2 - A suite of Nb-based piezoelectric ceramics of 0.99[Bi0.5(Na0.4K0.1)(Ti1-xNbx)]O3-0.01(Ba0.7Sr0.3)TiO3(BNKTN-BST), with x ranging from 0 to 0.030, was prepared by a conventional solid-state reaction method. X-ray diffraction patterns confirmed a single perovskite phase and the tetragonality was found to decrease with increasing Nb ratio. The BNKTN-BST ceramic had a high field-induced normalized strain coefficient of 634pm/V at 2mol% Nb content with a relatively small hysteresis compared with existing lead-free Bi-perovskite ceramics. An electric-field-dependent X-ray study was conducted to identify the main source of the high strain and ascertain the effect of electric fields on the crystal structure. The temperature-dependent P-E hysteresis loops of the BNKTN-BST ceramics were measured under an electric field of 60kV/cm at various temperatures, and the effect of temperature on the ferroelectricity is discussed.

AB - A suite of Nb-based piezoelectric ceramics of 0.99[Bi0.5(Na0.4K0.1)(Ti1-xNbx)]O3-0.01(Ba0.7Sr0.3)TiO3(BNKTN-BST), with x ranging from 0 to 0.030, was prepared by a conventional solid-state reaction method. X-ray diffraction patterns confirmed a single perovskite phase and the tetragonality was found to decrease with increasing Nb ratio. The BNKTN-BST ceramic had a high field-induced normalized strain coefficient of 634pm/V at 2mol% Nb content with a relatively small hysteresis compared with existing lead-free Bi-perovskite ceramics. An electric-field-dependent X-ray study was conducted to identify the main source of the high strain and ascertain the effect of electric fields on the crystal structure. The temperature-dependent P-E hysteresis loops of the BNKTN-BST ceramics were measured under an electric field of 60kV/cm at various temperatures, and the effect of temperature on the ferroelectricity is discussed.

KW - Bismuth sodium potassium titanate ceramics

KW - Lead-free

KW - Phase transition

KW - Piezoelectrics

KW - Strain

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Electric-field-induced phase transition and large strain in lead-free Nb-doped BNKT-BST ceramics

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