Dielectric relaxation in alumina based ceramics studied by thermally stimulated depolarization current method

Peng Zhang; Chuang Zhang; Chun Zhao; Shihang Wang; Jianying Li; Haiyun Jin; Hao Zhang; Junyong Lu

doi:10.1016/j.scriptamat.2017.06.023

Dielectric relaxation in alumina based ceramics studied by thermally stimulated depolarization current method

Peng Zhang
, Chuang Zhang
, Chun Zhao
, Shihang Wang
, Jianying Li
, Haiyun Jin
, Hao Zhang
, Junyong Lu

电气工程学院

Xi'an Jiaotong University
Xi'an University of Architecture and Technology
Naval University of Engineering Wuhan

科研成果: 期刊稿件 › 文章 › 同行评审

3 引用（Scopus）

摘要

Thermally stimulated depolarization currents (TSDC) method was used to investigate the dielectric relaxation processes in alumina based ceramics. TSDC of 99% purity alumina ceramics (A99) and zirconia toughened alumina ceramics (ZTA) with varied polarization electric fields and polarization temperatures were studied. Measurement results show that the TSDC was induced by dipole relaxation. The dipole in A99 ceramics consists of a substitutional Mg^2 + ion and a trapped hole on one of the nearest oxygen ions. And the dipole in ZTA ceramics is defect association of Y_Zr^' − V_O^•• − Y_Zr^'. The orientation of defect dipoles was due to the hopping of oxygen vacancies.

源语言	英语
页（从-至）	134-138
页数	5
期刊	Scripta Materialia
卷	139
DOI	https://doi.org/10.1016/j.scriptamat.2017.06.023
出版状态	已出版 - 10月 2017

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10.1016/j.scriptamat.2017.06.023

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引用此

@article{92779c997f0c49e3988ad45a09f35a26,

title = "Dielectric relaxation in alumina based ceramics studied by thermally stimulated depolarization current method",

abstract = "Thermally stimulated depolarization currents (TSDC) method was used to investigate the dielectric relaxation processes in alumina based ceramics. TSDC of 99\% purity alumina ceramics (A99) and zirconia toughened alumina ceramics (ZTA) with varied polarization electric fields and polarization temperatures were studied. Measurement results show that the TSDC was induced by dipole relaxation. The dipole in A99 ceramics consists of a substitutional Mg2 + ion and a trapped hole on one of the nearest oxygen ions. And the dipole in ZTA ceramics is defect association of YZr' − VO•• − YZr'. The orientation of defect dipoles was due to the hopping of oxygen vacancies.",

keywords = "Defect association, Dielectric relaxation, Thermally stimulated depolarization current, Zirconia toughened alumina",

author = "Peng Zhang and Chuang Zhang and Chun Zhao and Shihang Wang and Jianying Li and Haiyun Jin and Hao Zhang and Junyong Lu",

note = "Publisher Copyright: {\textcopyright} 2016",

year = "2017",

month = oct,

doi = "10.1016/j.scriptamat.2017.06.023",

language = "英语",

volume = "139",

pages = "134--138",

journal = "Scripta Materialia",

issn = "1359-6462",

publisher = "Acta Materialia Inc",

}

TY - JOUR

T1 - Dielectric relaxation in alumina based ceramics studied by thermally stimulated depolarization current method

AU - Zhang, Peng

AU - Zhang, Chuang

AU - Zhao, Chun

AU - Wang, Shihang

AU - Li, Jianying

AU - Jin, Haiyun

AU - Zhang, Hao

AU - Lu, Junyong

PY - 2017/10

Y1 - 2017/10

N2 - Thermally stimulated depolarization currents (TSDC) method was used to investigate the dielectric relaxation processes in alumina based ceramics. TSDC of 99% purity alumina ceramics (A99) and zirconia toughened alumina ceramics (ZTA) with varied polarization electric fields and polarization temperatures were studied. Measurement results show that the TSDC was induced by dipole relaxation. The dipole in A99 ceramics consists of a substitutional Mg2 + ion and a trapped hole on one of the nearest oxygen ions. And the dipole in ZTA ceramics is defect association of YZr' − VO•• − YZr'. The orientation of defect dipoles was due to the hopping of oxygen vacancies.

AB - Thermally stimulated depolarization currents (TSDC) method was used to investigate the dielectric relaxation processes in alumina based ceramics. TSDC of 99% purity alumina ceramics (A99) and zirconia toughened alumina ceramics (ZTA) with varied polarization electric fields and polarization temperatures were studied. Measurement results show that the TSDC was induced by dipole relaxation. The dipole in A99 ceramics consists of a substitutional Mg2 + ion and a trapped hole on one of the nearest oxygen ions. And the dipole in ZTA ceramics is defect association of YZr' − VO•• − YZr'. The orientation of defect dipoles was due to the hopping of oxygen vacancies.

KW - Defect association

KW - Dielectric relaxation

KW - Thermally stimulated depolarization current

KW - Zirconia toughened alumina

UR - https://www.scopus.com/pages/publications/85021298942

U2 - 10.1016/j.scriptamat.2017.06.023

DO - 10.1016/j.scriptamat.2017.06.023

M3 - 文章

AN - SCOPUS:85021298942

SN - 1359-6462

VL - 139

SP - 134

EP - 138

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Dielectric relaxation in alumina based ceramics studied by thermally stimulated depolarization current method

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