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- J. Y. Li
- Xi'an Jiaotong University 1 State Key Laboratory of Electrical Insulation and Power Equipment, , 28 Xianning West Road, Xi'an, Shaanxi 710049, People’s Republic of China
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- X. T. Zhao
- Xi'an Jiaotong University 1 State Key Laboratory of Electrical Insulation and Power Equipment, , 28 Xianning West Road, Xi'an, Shaanxi 710049, People’s Republic of China
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- S. T. Li
- Xi'an Jiaotong University 1 State Key Laboratory of Electrical Insulation and Power Equipment, , 28 Xianning West Road, Xi'an, Shaanxi 710049, People’s Republic of China
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- Mohammad A. Alim
- Alabama A&M University 2 Department of Electrical Engineering, , P.O. Box 297, Huntsville, Alabama 35762, USA
書誌事項
- 公開日
- 2010-11-15
- DOI
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- 10.1063/1.3511444
- 公開者
- AIP Publishing
この論文をさがす
説明
<jats:p>The effect of sintering process on the electrical properties of CaCu3Ti4O12 (CCTO) ceramic dielectrics were investigated in this paper. It was found that grain size is affected by sintering and the nonlinear current-voltage (I-V) property will decrease with the increased sintering time. Also, the frequency and temperature dependences of dielectric permittivity and loss in the ranges of 10−1–107 Hz and 130–270 K were studied. Two relaxation processes with activation energy of 0.51 eV and 0.10 eV, respectively, were found in the frequency dependence of tan δ and Cole–Cole planes, which can be interpreted in terms of insulating grain boundaries and semiconducting grains. It was suggested that grain boundary Maxwell–Wagner relaxation and ionization of oxygen vacancy VO++, proposed as extrinsic and intrinsic relaxations, are responsible for the dielectric behaviors of CCTO ceramics.</jats:p>
収録刊行物
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- Journal of Applied Physics
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Journal of Applied Physics 108 (10), 2010-11-15
AIP Publishing