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Effect of direct current degradation on dielectric property of CaCu3Ti4O12 ceramic

Zhao Xue-Tong Liao Rui-Jin Li Jian-Ying Wang Fei-Peng

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Effect of direct current degradation on dielectric property of CaCu3Ti4O12 ceramic

Zhao Xue-Tong, Liao Rui-Jin, Li Jian-Ying, Wang Fei-Peng
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  • CaCu3Ti4O12 ceramic has drawn much attention due to its stable colossal dielectric permittivity and pronounced nonlinear electrical characteristics. In this work, the effects of direct current degradation on the dielectric response and electrical property of CaCu3Ti4O12 ceramic aged for 60 h under 3.5 kV/cm are investigated. The results of J-E characteristic analysis show that the breakdown field E1mA decreases from 216 V/mm to 144 V/mm and nonlinear coefficient η decreases from 4.1 to 2.1. The barrier heights of CaCu3Ti4O12 ceramics are calculated to be in a range of 293-368 K, based on the J-E curves, which decrease from 0.57 eV to 0.31 eV. It is found that the dielectric constant and dielectric loss at low frequencies are significantly increased. Based on Debye function, it is indicated that the dielectric loss is composed of direct current conductance loss and relaxation loss, especially the direct current conductance loss is enhanced by the direct current degradation. At 233 K, two relaxation peaks whose activation energies are 0.10 eV and 0.50 eV can be found, which are considered to be related to grain and domain boundary and not vary with direct current degradation. Electric modulus spectra are used to characterize the role of direct current degradation in the relaxation process of CaCu3Ti4O12 ceramic. The results show that the variation of interfacial space charges caused by direct current degradation obeys the Maxwell-Wagner polarization. It may be a key factor to lead to the increase of dielectric permittivity below 10 Hz, and a new corresponding relaxation peak θ can be observed in the modulus plot at low frequency. In the impedance spectra in 323-473 K, the relaxation peaks of grain boundary shift toward high frequency after direct current degradation. The results from the complex impedance plane show that the resistance of the grain boundary decreases by about two orders of magnitude and its activation energy drops off from 1.23 eV to 0.72 eV, while the resistance of grain decreases a little and its activation energy has no obvious variation. Therefore, it is proposed that direct current degradation should play an important role in grain boundary and affect its electrical property and dielectric response. An RC circuit model is proposed to elucidate the correlation between dielectric relaxation and electrical property of CaCu3Ti4O12 ceramic.
    • Funds: Project supported the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51407019), the Fundamental Research Funds for the Central Universities, China (Grant No. 106112015CDJZR155509), and the Visiting Scholarship Foundation of China (Grant No. 2007DA10512713408).
    [1]

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    [2]

    Subramanian M A, Li D, Duan N, Reisner B A, Sleight A W 2000 J. Solid State Chem. 151 323

    [3]

    Homes C C, Vogt T, Shapiro S M, Wakimoto S, Ramirez A P 2001 Science 293 673

    [4]

    He L X, Neaton J B, Cohen M H, Vanderbilt D 2002 Phys. Rev. B 65 214112

    [5]

    Cohen M H, Neaton J B, He L X, Vandebilt D 2003 J. Appl. Phys. 94 3299

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    Fang T T, Liu C P 2005 Chem. Mater. 17 5167

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    Li W, Schwartz R W 2006 Appl. Phys. Lett. 89 242906

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    Li W, Schwartz R W, Chen A P, Zhu J S 2002 Appl. Phys. Lett. 80 2153

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    Bärner K, Luo X J, Song X P, Hang C, Chen S S, Medvedeva I V, Yang C P 2011 J. Mater. Res. 26 36

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    Luo X J, Yang C P, Song X P, Xu L F 2010 Acta Phys. Sin. 59 3516 (in Chinese) [罗晓婧, 杨昌平, 宋学平, 徐玲芳 2010 物理学报 59 3516]

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    Shao S F, Zhang J L, Zheng P, Zhong W L, Wang C L 2006 J. Appl. Phys. 99 084106

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    Fang T T, Shiau H K 2004 J. Am. Ceram. Soc. 87 2072

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    Chen L, Chen C L, Lin Y, Chen Y B, Chen X H, Bontchev R P, Park C Y, Jacobson A J 2003 Appl. Phys. Lett. 82 2317

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    Yang Y, Li S T, Ding C, Cheng P F 2011 Chin. Phys. B 20 025201

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    Zhao X T, Li J Y, Li H, Li S T 2012 J. Appl. Phys. 111 124106

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    Levinson L M, Philipp H R 1976 J. Appl. Phys. 47 1117

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    Clarke D R 1999 J. Am. Ceram. Soc. 82 485

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    Mukae K, Tsuda K, Nagasawa I 1977 Jpn. J. Appl. Phys. 16 1361

    [19]

    Chen J D, Liu Z Y 1982 Dielectric Physics (Beijing: Mechanical Industry Press) p151 (in Chinese) [陈季丹, 刘子玉 1982 电介质物理学 (北京: 机械工业出版社) 第151页]

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    Zhao X T, Liao R J, Liang N C, Yang L J, Li J, Li J Y 2014 J. Appl. Phys. 116 014103

    [21]

    Li J Y, Zhao X T, Li S T, Alim M A 2010 J. Appl. Phys. 108 104104

    [22]

    Roling B, Happe A, Funke K, Ingram M D 1997 Phys. Rev. Lett. 78 2160

    [23]

    Liu J J, Duan C G, Yin W G, Mei W N, Smith R W, Hardy J R 2004 Phys. Rev. B 70 144106

    [24]

    Sinclair D C, West A R 1989 J. Appl. Phys. 66 3850

    [25]

    Ishikawa H, Ohki Y 2008 IEEJ Trans. Fundam. Mater. 128 647

    [26]

    Liu L, Fan H, Wang L, Chen X, Fang P 2008 Philos. Mag. 88 537

    [27]

    Hong Y W, Kim J H 2004 Ceram. Int. 30 1307

    [28]

    Zhang J L, Zheng P, Wang C L, Zhao M L, Li J C, Wang J F 2005 Appl. Phys. Lett. 87 142901

  • [1]

    Yang C P, Li M Y, Song X P, Xiao H B, Xu L F 2012 Acta Phys. Sin. 61 197702 (in Chinese) [杨昌平, 李旻奕, 宋学平, 肖海波, 徐玲芳 2012 物理学报 61 197702]

    [2]

    Subramanian M A, Li D, Duan N, Reisner B A, Sleight A W 2000 J. Solid State Chem. 151 323

    [3]

    Homes C C, Vogt T, Shapiro S M, Wakimoto S, Ramirez A P 2001 Science 293 673

    [4]

    He L X, Neaton J B, Cohen M H, Vanderbilt D 2002 Phys. Rev. B 65 214112

    [5]

    Cohen M H, Neaton J B, He L X, Vandebilt D 2003 J. Appl. Phys. 94 3299

    [6]

    Fang T T, Liu C P 2005 Chem. Mater. 17 5167

    [7]

    Li W, Schwartz R W 2006 Appl. Phys. Lett. 89 242906

    [8]

    Li W, Schwartz R W, Chen A P, Zhu J S 2002 Appl. Phys. Lett. 80 2153

    [9]

    Bärner K, Luo X J, Song X P, Hang C, Chen S S, Medvedeva I V, Yang C P 2011 J. Mater. Res. 26 36

    [10]

    Luo X J, Yang C P, Song X P, Xu L F 2010 Acta Phys. Sin. 59 3516 (in Chinese) [罗晓婧, 杨昌平, 宋学平, 徐玲芳 2010 物理学报 59 3516]

    [11]

    Shao S F, Zhang J L, Zheng P, Zhong W L, Wang C L 2006 J. Appl. Phys. 99 084106

    [12]

    Fang T T, Shiau H K 2004 J. Am. Ceram. Soc. 87 2072

    [13]

    Chen L, Chen C L, Lin Y, Chen Y B, Chen X H, Bontchev R P, Park C Y, Jacobson A J 2003 Appl. Phys. Lett. 82 2317

    [14]

    Yang Y, Li S T, Ding C, Cheng P F 2011 Chin. Phys. B 20 025201

    [15]

    Zhao X T, Li J Y, Li H, Li S T 2012 J. Appl. Phys. 111 124106

    [16]

    Levinson L M, Philipp H R 1976 J. Appl. Phys. 47 1117

    [17]

    Clarke D R 1999 J. Am. Ceram. Soc. 82 485

    [18]

    Mukae K, Tsuda K, Nagasawa I 1977 Jpn. J. Appl. Phys. 16 1361

    [19]

    Chen J D, Liu Z Y 1982 Dielectric Physics (Beijing: Mechanical Industry Press) p151 (in Chinese) [陈季丹, 刘子玉 1982 电介质物理学 (北京: 机械工业出版社) 第151页]

    [20]

    Zhao X T, Liao R J, Liang N C, Yang L J, Li J, Li J Y 2014 J. Appl. Phys. 116 014103

    [21]

    Li J Y, Zhao X T, Li S T, Alim M A 2010 J. Appl. Phys. 108 104104

    [22]

    Roling B, Happe A, Funke K, Ingram M D 1997 Phys. Rev. Lett. 78 2160

    [23]

    Liu J J, Duan C G, Yin W G, Mei W N, Smith R W, Hardy J R 2004 Phys. Rev. B 70 144106

    [24]

    Sinclair D C, West A R 1989 J. Appl. Phys. 66 3850

    [25]

    Ishikawa H, Ohki Y 2008 IEEJ Trans. Fundam. Mater. 128 647

    [26]

    Liu L, Fan H, Wang L, Chen X, Fang P 2008 Philos. Mag. 88 537

    [27]

    Hong Y W, Kim J H 2004 Ceram. Int. 30 1307

    [28]

    Zhang J L, Zheng P, Wang C L, Zhao M L, Li J C, Wang J F 2005 Appl. Phys. Lett. 87 142901

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Publishing process
  • Received Date:  10 December 2014
  • Accepted Date:  03 February 2015
  • Published Online:  05 June 2015

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