Dielectric relaxation properties of SrTiO3 ceramics modulated by stoichiometry

Xiaofei Wang; Qiubo Hu; Guozhong Zang; Chao Zhang; Liben Li

doi:10.1016/j.ceramint.2017.12.057

Dielectric relaxation properties of SrTiO₃ ceramics modulated by stoichiometry

Xiaofei Wang
, Qiubo Hu
, Guozhong Zang
, Chao Zhang
, Liben Li

School of Physics and Engineering
Henan University of Science and Technology
Department of Mathematics and Science
Luoyang Institute of Science and Technology

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

7 Scopus citations

Abstract

SrTiO₃ has received increasing attention duo to the fact that small perturbation can produce outstanding physical properties. Nonstoichiometric SrTiO₃ ceramics have been prepared in the range of Sr/Ti = 1.064–0.943. Their dielectric behaviors are investigated in the temperature range of 30–500 °C and in the frequency range 100 Hz to 2 MHz. It is observed that the two types of dielectric relaxation processes are caused by polar nanoregions associated with Sr non-stoichiometry and variable range hopping behavior associated with the dipolar effects for Sr/Ti>1 and Sr/Ti<1 ceramics samples, respectively. Our findings imply that the cation vacancy may be responsible for the adjusted properties in nonstoichiometric SrTiO₃.

Original language	English
Pages (from-to)	4740-4743
Number of pages	4
Journal	Ceramics International
Volume	44
Issue number	5
DOIs	https://doi.org/10.1016/j.ceramint.2017.12.057
State	Published - 1 Apr 2018
Externally published	Yes

Keywords

Ceramics
Defects
Dielectrics
Non-stoichiometry

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10.1016/j.ceramint.2017.12.057

Cite this

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title = "Dielectric relaxation properties of SrTiO3 ceramics modulated by stoichiometry",

abstract = "SrTiO3 has received increasing attention duo to the fact that small perturbation can produce outstanding physical properties. Nonstoichiometric SrTiO3 ceramics have been prepared in the range of Sr/Ti = 1.064{\textendash}0.943. Their dielectric behaviors are investigated in the temperature range of 30{\textendash}500 °C and in the frequency range 100 Hz to 2 MHz. It is observed that the two types of dielectric relaxation processes are caused by polar nanoregions associated with Sr non-stoichiometry and variable range hopping behavior associated with the dipolar effects for Sr/Ti>1 and Sr/Ti<1 ceramics samples, respectively. Our findings imply that the cation vacancy may be responsible for the adjusted properties in nonstoichiometric SrTiO3.",

keywords = "Ceramics, Defects, Dielectrics, Non-stoichiometry",

author = "Xiaofei Wang and Qiubo Hu and Guozhong Zang and Chao Zhang and Liben Li",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd and Techna Group S.r.l.",

year = "2018",

month = apr,

day = "1",

doi = "10.1016/j.ceramint.2017.12.057",

language = "英语",

volume = "44",

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journal = "Ceramics International",

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}

TY - JOUR

T1 - Dielectric relaxation properties of SrTiO3 ceramics modulated by stoichiometry

AU - Wang, Xiaofei

AU - Hu, Qiubo

AU - Zang, Guozhong

AU - Zhang, Chao

AU - Li, Liben

PY - 2018/4/1

Y1 - 2018/4/1

N2 - SrTiO3 has received increasing attention duo to the fact that small perturbation can produce outstanding physical properties. Nonstoichiometric SrTiO3 ceramics have been prepared in the range of Sr/Ti = 1.064–0.943. Their dielectric behaviors are investigated in the temperature range of 30–500 °C and in the frequency range 100 Hz to 2 MHz. It is observed that the two types of dielectric relaxation processes are caused by polar nanoregions associated with Sr non-stoichiometry and variable range hopping behavior associated with the dipolar effects for Sr/Ti>1 and Sr/Ti<1 ceramics samples, respectively. Our findings imply that the cation vacancy may be responsible for the adjusted properties in nonstoichiometric SrTiO3.

AB - SrTiO3 has received increasing attention duo to the fact that small perturbation can produce outstanding physical properties. Nonstoichiometric SrTiO3 ceramics have been prepared in the range of Sr/Ti = 1.064–0.943. Their dielectric behaviors are investigated in the temperature range of 30–500 °C and in the frequency range 100 Hz to 2 MHz. It is observed that the two types of dielectric relaxation processes are caused by polar nanoregions associated with Sr non-stoichiometry and variable range hopping behavior associated with the dipolar effects for Sr/Ti>1 and Sr/Ti<1 ceramics samples, respectively. Our findings imply that the cation vacancy may be responsible for the adjusted properties in nonstoichiometric SrTiO3.

KW - Ceramics

KW - Defects

KW - Dielectrics

KW - Non-stoichiometry

UR - https://www.scopus.com/pages/publications/85039072910

U2 - 10.1016/j.ceramint.2017.12.057

DO - 10.1016/j.ceramint.2017.12.057

M3 - 文章

AN - SCOPUS:85039072910

SN - 0272-8842

VL - 44

SP - 4740

EP - 4743

JO - Ceramics International

JF - Ceramics International

IS - 5

ER -

Dielectric relaxation properties of SrTiO₃ ceramics modulated by stoichiometry

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Keywords

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