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Precursor powder of CaCu3Ti4O12 is prepared by a simplified coprecipitation process, in which an optimum reaction condition with ammonium acetate is used as buffer solution and pH=3.0 is proved by X-ray diffraction and scanning electron microscope. The CaCu3Ti4O12 ceramics samples are prepared by sintering the calcined powder at different temperatures (1040℃-1100℃). It is found that higher sintering temperature of CaCu3Ti4O12 ceramics will lead to lager grain size, higher dielectric constant and lower dielectric loss. The dielectric loss of CaCu3Ti4O12 ceramics is suggested to be due to DC electric conductivity, low-frequency relaxation loss and high-frequency relaxation loss. The low-frequency and high-frequency relaxations are related to grain boundary and oxygen vacancy defects respectively.
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Keywords:
- giant dielectric constant /
- simplified coprecipitation /
- relaxation polarization /
- CaCu3Ti4O12 ceramics
[1] Subramanian M A, Dong L, Duan N, Reisner B A, Sleight A W 2000 Solid State Chem. 151 323
[2] Ramirez A P, Subramanian M A, Gardel M, Blumberg G, Li D, Vogt T, Shapiro S M 2000 Solid State Commun. 151 217
[3] Subramanian M A, Sleight A W 2002 Solid State Sci. 4 347
[4] He L X, Neaton J B, Cohen M H, Vanderbilt D, Homes C C 2002 Phys. Rev. B 65 214112
[5] He L X, Neaton J B, Vanderbilt D, Choen M H 2003 Phys. Rev. B 67 012103
[6] Cohen M H, Neaton J B, He L X, Vanderbilt D 2003 J. Appl. Phys. 94 3299
[7] Zhang L, Tang Z 2004 Phys. Rev. B 70 174306
[8] Tselev A, Brooks C M, Anlage S M, Zheng H, Riba L S, Ramesh R, Subramanian M A 2004 Phys. Rev. B 70 144101
[9] Chiodelli G, Massarotti V, Capsoni D, Bini M, Azzoni C B, Mozzati M C, Lupotto P 2004 Solid State Commun. 132 241
[10] Fang L, Shen M, Cao W 2004 J. Appl. Phys. 95 6483
[11] Homes C C, Vogt T, Shapiro S M, Wakimoto S, Subramanian M A, Ramirez A P 2003 Phys. Rev. B 67 092106
[12] 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
[13] Fang T T, Liu C P 2005 Chem. Mater. 17 5167
[14] Fang T T, Shiau H K 2004 J. Am. Ceram. Soc. 87 2072
[15] Fu D S, Taniguchi H, Taniyama T, Itoh M, Koshihara S Y 2008 Chem. Mater. 20 1694
[16] Yang C H, Zhou X L, Xu G, Han G R, Weng W J, Du P Y 2006 J. Chin. Ceram. Soc. 34 753 (in Chinese) [杨昌辉, 周小莉, 徐刚, 韩高荣, 翁文剑, 杜丕一 2006 硅酸盐学报 34 753]
[17] Guillemet-Fritscha S, Lebeyb T, Boulosa M, Duranda B 2006 J. Eur. Ceram. Soc. 26 1245
[18] Marchin L, Guillemet-Fritsch S, Durand B 2007 Prog. Solid State Chem. 36 151
[19] Yang Y, Li S T 2010 J. Inorg. Mater. 25 835 (in Chinese) [杨雁, 李盛涛 2010 无机材料学报 25 835]
[20] Sinclair D C, Adams T B, Morrison F D, West A R 2002 Appl. Phys. Lett. 80 2153
[21] Zang G Z, Zhang J L, Zheng P, Wang J F, Wang C L 2005 J. Phys. D: Appl. Phys. 38 1824
[22] Morrison F D, Sinclair D C, West A R 2001 J. Am. Ceram. Soc. 84 531
[23] Li W, Schwartz R W 2007 Phys. Rev. B 75 012104
[24] Li J Y, Zhao X T, Li S T, Alim M A 2010 J. Appl. Phys. 108 104104
[25] Li J Y, Xu T W, Li S T, Jin H Y, Li W 2010 J. Alloys Compd. 506 L1
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[1] Subramanian M A, Dong L, Duan N, Reisner B A, Sleight A W 2000 Solid State Chem. 151 323
[2] Ramirez A P, Subramanian M A, Gardel M, Blumberg G, Li D, Vogt T, Shapiro S M 2000 Solid State Commun. 151 217
[3] Subramanian M A, Sleight A W 2002 Solid State Sci. 4 347
[4] He L X, Neaton J B, Cohen M H, Vanderbilt D, Homes C C 2002 Phys. Rev. B 65 214112
[5] He L X, Neaton J B, Vanderbilt D, Choen M H 2003 Phys. Rev. B 67 012103
[6] Cohen M H, Neaton J B, He L X, Vanderbilt D 2003 J. Appl. Phys. 94 3299
[7] Zhang L, Tang Z 2004 Phys. Rev. B 70 174306
[8] Tselev A, Brooks C M, Anlage S M, Zheng H, Riba L S, Ramesh R, Subramanian M A 2004 Phys. Rev. B 70 144101
[9] Chiodelli G, Massarotti V, Capsoni D, Bini M, Azzoni C B, Mozzati M C, Lupotto P 2004 Solid State Commun. 132 241
[10] Fang L, Shen M, Cao W 2004 J. Appl. Phys. 95 6483
[11] Homes C C, Vogt T, Shapiro S M, Wakimoto S, Subramanian M A, Ramirez A P 2003 Phys. Rev. B 67 092106
[12] 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
[13] Fang T T, Liu C P 2005 Chem. Mater. 17 5167
[14] Fang T T, Shiau H K 2004 J. Am. Ceram. Soc. 87 2072
[15] Fu D S, Taniguchi H, Taniyama T, Itoh M, Koshihara S Y 2008 Chem. Mater. 20 1694
[16] Yang C H, Zhou X L, Xu G, Han G R, Weng W J, Du P Y 2006 J. Chin. Ceram. Soc. 34 753 (in Chinese) [杨昌辉, 周小莉, 徐刚, 韩高荣, 翁文剑, 杜丕一 2006 硅酸盐学报 34 753]
[17] Guillemet-Fritscha S, Lebeyb T, Boulosa M, Duranda B 2006 J. Eur. Ceram. Soc. 26 1245
[18] Marchin L, Guillemet-Fritsch S, Durand B 2007 Prog. Solid State Chem. 36 151
[19] Yang Y, Li S T 2010 J. Inorg. Mater. 25 835 (in Chinese) [杨雁, 李盛涛 2010 无机材料学报 25 835]
[20] Sinclair D C, Adams T B, Morrison F D, West A R 2002 Appl. Phys. Lett. 80 2153
[21] Zang G Z, Zhang J L, Zheng P, Wang J F, Wang C L 2005 J. Phys. D: Appl. Phys. 38 1824
[22] Morrison F D, Sinclair D C, West A R 2001 J. Am. Ceram. Soc. 84 531
[23] Li W, Schwartz R W 2007 Phys. Rev. B 75 012104
[24] Li J Y, Zhao X T, Li S T, Alim M A 2010 J. Appl. Phys. 108 104104
[25] Li J Y, Xu T W, Li S T, Jin H Y, Li W 2010 J. Alloys Compd. 506 L1
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