Structural dependence of piezoelectric, dielectric and ferroelectric properties of K0.5Na0.5(Nb1-2x/5Cux)O3lead-free ceramics with high Qm

Xiaohui Tan; Huiqing Fan; Shanming Ke; Li Min Zhou; Yiu Wing Mai; Haitao Huang

doi:10.1016/j.materresbull.2012.09.049

Structural dependence of piezoelectric, dielectric and ferroelectric properties of K_0.5Na_0.5(Nb_1-2x/5Cu_x)O₃lead-free ceramics with high Q_m

Xiaohui Tan, Huiqing Fan, Shanming Ke, Li Min Zhou, Yiu Wing Mai, Haitao Huang

Research output: Journal article publication › Journal article › Academic research › peer-review

37 Citations (Scopus)

Abstract

(K0.5Na0.5)(Nb1-2x/5Cux)O3(abbreviated as KNNC, x = 0-2%) lead-free ceramics were synthetized by the solid state solution method. Pure perovskite phase with orthorhombic symmetry was observed. The evolution of the structure of KNNC was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering spectra techniques. Our results revealed that, defect dipoles (Cu'''Nb-VO• •)' were formed and provided a restoring force to reverse the switched polarization, which resulted in double P-E hysteresis loops in KNNC with Cu doping at x = 0.75% and 1%. However, non-polar defect complex (VO••-Cu'''Nb-VO••) • caused a lattice shrinkage and the observed square shaped P-E loops in KNNC ceramics under high doping levels (x > 1%).

Original language	English
Pages (from-to)	4472-4477
Number of pages	6
Journal	Materials Research Bulletin
Volume	47
Issue number	12
DOIs	https://doi.org/10.1016/j.materresbull.2012.09.049
Publication status	Published - 1 Dec 2012

Keywords

A. Ceramics
D. Defects
D. Piezoelectricity

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

More information

10.1016/j.materresbull.2012.09.049

Cite this

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title = "Structural dependence of piezoelectric, dielectric and ferroelectric properties of K0.5Na0.5(Nb1-2x/5Cux)O3lead-free ceramics with high Qm",

abstract = "(K0.5Na0.5)(Nb1-2x/5Cux)O3(abbreviated as KNNC, x = 0-2%) lead-free ceramics were synthetized by the solid state solution method. Pure perovskite phase with orthorhombic symmetry was observed. The evolution of the structure of KNNC was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering spectra techniques. Our results revealed that, defect dipoles (Cu'''Nb-VO• •)' were formed and provided a restoring force to reverse the switched polarization, which resulted in double P-E hysteresis loops in KNNC with Cu doping at x = 0.75% and 1%. However, non-polar defect complex (VO••-Cu'''Nb-VO••) • caused a lattice shrinkage and the observed square shaped P-E loops in KNNC ceramics under high doping levels (x > 1%).",

keywords = "A. Ceramics, D. Defects, D. Piezoelectricity",

author = "Xiaohui Tan and Huiqing Fan and Shanming Ke and Zhou, {Li Min} and Mai, {Yiu Wing} and Haitao Huang",

year = "2012",

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doi = "10.1016/j.materresbull.2012.09.049",

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T1 - Structural dependence of piezoelectric, dielectric and ferroelectric properties of K0.5Na0.5(Nb1-2x/5Cux)O3lead-free ceramics with high Qm

AU - Tan, Xiaohui

AU - Fan, Huiqing

AU - Ke, Shanming

AU - Zhou, Li Min

AU - Mai, Yiu Wing

AU - Huang, Haitao

PY - 2012/12/1

Y1 - 2012/12/1

N2 - (K0.5Na0.5)(Nb1-2x/5Cux)O3(abbreviated as KNNC, x = 0-2%) lead-free ceramics were synthetized by the solid state solution method. Pure perovskite phase with orthorhombic symmetry was observed. The evolution of the structure of KNNC was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering spectra techniques. Our results revealed that, defect dipoles (Cu'''Nb-VO• •)' were formed and provided a restoring force to reverse the switched polarization, which resulted in double P-E hysteresis loops in KNNC with Cu doping at x = 0.75% and 1%. However, non-polar defect complex (VO••-Cu'''Nb-VO••) • caused a lattice shrinkage and the observed square shaped P-E loops in KNNC ceramics under high doping levels (x > 1%).

AB - (K0.5Na0.5)(Nb1-2x/5Cux)O3(abbreviated as KNNC, x = 0-2%) lead-free ceramics were synthetized by the solid state solution method. Pure perovskite phase with orthorhombic symmetry was observed. The evolution of the structure of KNNC was examined by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Raman scattering spectra techniques. Our results revealed that, defect dipoles (Cu'''Nb-VO• •)' were formed and provided a restoring force to reverse the switched polarization, which resulted in double P-E hysteresis loops in KNNC with Cu doping at x = 0.75% and 1%. However, non-polar defect complex (VO••-Cu'''Nb-VO••) • caused a lattice shrinkage and the observed square shaped P-E loops in KNNC ceramics under high doping levels (x > 1%).

KW - A. Ceramics

KW - D. Defects

KW - D. Piezoelectricity

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