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Abnormal dielectric behaviors in Mn-doped CaCu3Ti4O12 ceramics and their response mechanism
Lin, YH; Deng, W; Xu W(徐伟); Xu, W; Liu, Y; Chen, DL; Zhang, XL; Nan, CW; Chen DL(陈栋梁); Zhang XL(张晓丽)
2012
发表期刊MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
卷号177期号:20页码:1773-1776
摘要Mn-doped CaCu3Ti4O12 (CCTO) polycrystalline ceramics have been prepared by the conventional solid state sintering. Our results indicate that 10% Mn doping can decrease the dielectric permittivity in CaCu3Ti4O12 by about 2 orders of magnitude (from 10(4) to 10(2)). The grain and grain boundary activation energies show an obvious increase from 0.054 eV to 0.256 eV, and decrease from 0.724 eV to 0.258 eV with increasing the Mn doping concentration, respectively, which may be caused by the variation of Cu and Ti valence states in the CCTO samples evidenced by the X-ray absorption spectra. The similar grain and grain boundary activation energies result in invalidation of the internal boundary layer capacitance effect for the 10% Mn-doped CCTO sample, and thus result in the dramatic decrease of dielectric permittivity. (C) 2012 Elsevier B.V. All rights reserved.
关键词CaCu3Ti4O12 High dielectric Activation energy
学科领域Materials Science; Physics
DOI10.1016/j.mseb.2012.08.021
收录类别SCI
WOS记录号WOS:000311926900008
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224169
专题多学科研究中心
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GB/T 7714
Lin, YH,Deng, W,Xu W,et al. Abnormal dielectric behaviors in Mn-doped CaCu3Ti4O12 ceramics and their response mechanism[J]. MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS,2012,177(20):1773-1776.
APA Lin, YH.,Deng, W.,徐伟.,Xu, W.,Liu, Y.,...&张晓丽.(2012).Abnormal dielectric behaviors in Mn-doped CaCu3Ti4O12 ceramics and their response mechanism.MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS,177(20),1773-1776.
MLA Lin, YH,et al."Abnormal dielectric behaviors in Mn-doped CaCu3Ti4O12 ceramics and their response mechanism".MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS 177.20(2012):1773-1776.
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