Phase transitions and electrical/optical properties in (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics

Xue Zhang; Guoshuai Li; Feng Mao; Dongdong Han; Chengbin Jing; Ye Chen; Pingxiong Yang; Junhao Chu; Fangyu Yue

doi:10.1016/j.ceramint.2020.04.118

Phase transitions and electrical/optical properties in (1-x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ ceramics

Xue Zhang
, Guoshuai Li
, Feng Mao
, Dongdong Han
, Chengbin Jing
, Ye Chen
, Pingxiong Yang^*
, Junhao Chu
, Fangyu Yue^*

^*Corresponding author for this work

School of Physics and Electronic Science

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

5 Scopus citations

Abstract

Doping- and temperature-induced phase transitions and optical/electric-properties for (1-x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ ceramics are studied. With the increase of x-value, a series of structural phase transitions from orthorhombic to tetragonal and to cubic is observed, and the phase transition temperatures are also improved for forming a stable phase. The deteriorated ferroelectric property, which also suggests the doping-induced phase transition due to the enhancement of the crystal symmetry, can be tentatively interpreted from the optical evolution with doping. This doping can introduce or enhance the bandedge- or in-gap states but without influence upon the optical bandgap of KNbO₃. These results help in understanding the control of the structure, optical and electrical properties in KNbO₃-based ferroelectric oxides.

Original language	English
Pages (from-to)	18026-18031
Number of pages	6
Journal	Ceramics International
Volume	46
Issue number	11
DOIs	https://doi.org/10.1016/j.ceramint.2020.04.118
State	Published - 1 Aug 2020

Keywords

Doped KNbO ceramics
Electrical and optical properties
Phase transition
Raman

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10.1016/j.ceramint.2020.04.118

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title = "Phase transitions and electrical/optical properties in (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics",

abstract = "Doping- and temperature-induced phase transitions and optical/electric-properties for (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics are studied. With the increase of x-value, a series of structural phase transitions from orthorhombic to tetragonal and to cubic is observed, and the phase transition temperatures are also improved for forming a stable phase. The deteriorated ferroelectric property, which also suggests the doping-induced phase transition due to the enhancement of the crystal symmetry, can be tentatively interpreted from the optical evolution with doping. This doping can introduce or enhance the bandedge- or in-gap states but without influence upon the optical bandgap of KNbO3. These results help in understanding the control of the structure, optical and electrical properties in KNbO3-based ferroelectric oxides.",

keywords = "Doped KNbO ceramics, Electrical and optical properties, Phase transition, Raman",

author = "Xue Zhang and Guoshuai Li and Feng Mao and Dongdong Han and Chengbin Jing and Ye Chen and Pingxiong Yang and Junhao Chu and Fangyu Yue",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd and Techna Group S.r.l.",

year = "2020",

month = aug,

day = "1",

doi = "10.1016/j.ceramint.2020.04.118",

language = "英语",

volume = "46",

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TY - JOUR

T1 - Phase transitions and electrical/optical properties in (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics

AU - Zhang, Xue

AU - Li, Guoshuai

AU - Mao, Feng

AU - Han, Dongdong

AU - Jing, Chengbin

AU - Chen, Ye

AU - Yang, Pingxiong

AU - Chu, Junhao

AU - Yue, Fangyu

PY - 2020/8/1

Y1 - 2020/8/1

N2 - Doping- and temperature-induced phase transitions and optical/electric-properties for (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics are studied. With the increase of x-value, a series of structural phase transitions from orthorhombic to tetragonal and to cubic is observed, and the phase transition temperatures are also improved for forming a stable phase. The deteriorated ferroelectric property, which also suggests the doping-induced phase transition due to the enhancement of the crystal symmetry, can be tentatively interpreted from the optical evolution with doping. This doping can introduce or enhance the bandedge- or in-gap states but without influence upon the optical bandgap of KNbO3. These results help in understanding the control of the structure, optical and electrical properties in KNbO3-based ferroelectric oxides.

AB - Doping- and temperature-induced phase transitions and optical/electric-properties for (1-x)KNbO3-x(Ba0.5Bi0.5)(Nb0.5Zn0.5)O3 ceramics are studied. With the increase of x-value, a series of structural phase transitions from orthorhombic to tetragonal and to cubic is observed, and the phase transition temperatures are also improved for forming a stable phase. The deteriorated ferroelectric property, which also suggests the doping-induced phase transition due to the enhancement of the crystal symmetry, can be tentatively interpreted from the optical evolution with doping. This doping can introduce or enhance the bandedge- or in-gap states but without influence upon the optical bandgap of KNbO3. These results help in understanding the control of the structure, optical and electrical properties in KNbO3-based ferroelectric oxides.

KW - Doped KNbO ceramics

KW - Electrical and optical properties

KW - Phase transition

KW - Raman

UR - https://www.scopus.com/pages/publications/85083343600

U2 - 10.1016/j.ceramint.2020.04.118

DO - 10.1016/j.ceramint.2020.04.118

M3 - 文章

AN - SCOPUS:85083343600

SN - 0272-8842

VL - 46

SP - 18026

EP - 18031

JO - Ceramics International

JF - Ceramics International

IS - 11

ER -

Phase transitions and electrical/optical properties in (1-x)KNbO₃-x(Ba_0.5Bi_0.5)(Nb_0.5Zn_0.5)O₃ ceramics

Abstract

Keywords

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