Leading role of grain boundaries in colossal permittivity of doped and undoped CCTO

被引：91

作者：

De Almeida-Didry, Sonia ^{[1
]}

Autret, Cecile ^{[1
]}

Lucas, Anthony ^{[2
]}

Honstettre, Christophe ^{[1
]}

Pacreau, Francois ^{[2
]}

Gervais, Francois ^{[1
]}

机构：

[1] Univ Tours, CNRS, UFR Sci & Techn, GREMAN UMR 7341, F-37200 Tours, France

[2] SRT Microceram, F-41100 Vendome, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 15期

关键词：

Colossal permittivity; Capacitor; Leakage; IBLC; CCTO; HIGH-DIELECTRIC-CONSTANT; CACU3TI4O12; CERAMICS; BEHAVIOR;

D O I：

10.1016/j.jeurceramsoc.2014.06.009

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The role of grain boundaries in the colossal permittivity epsilon of doped and undoped calcium copper titanate, CaCu3Ti4O12 (CCTO), is illustrated by a first correlation - over four orders of magnitude - between epsilon and the capacity of grain boundaries, not that of grains, deduced from the analysis of impedance measurements. The DC resistance of the CCTO sample which is essential to make efficient capacitors for technological applications, as well as the loss factor tan(delta), are found to be correlated with the resistance of the grain boundaries rather than that of the grains. The correlation extends over almost seven orders of magnitude. These findings, consistent with the internal barrier layer capacitance (IBLC) model, indicate the leading role of grain boundaries in the origin of the capacitance of CCTO samples (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：3649 / 3654

页数：6

共 28 条

[1] Influence of processing conditions on the electrical properties of CaCu3Ti4O12 ceramics
Adams, T. B.
Sinclair, D. C.
West, A. R.
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 2006, 89 (10) : 3129 - 3135
[2] Characterization of grain boundary impedances in fine- and coarse-grained CaCu3Ti4O12 ceramics -: art. no. 094124
Adams, TB
Sinclair, DC
West, AR
[J]. PHYSICAL REVIEW B, 2006, 73 (09)
[3] Adams TB, 2002, ADV MATER, V14, P1321, DOI 10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO
[4] 2-P
[5] Grain size effects on the dielectric constant of CaCu3Ti4O12 ceramics
Brizé, V
Gruener, G
Wolfman, J
Fatyeyeva, K
Tabellout, M
Gervais, M
Gervais, F
[J]. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2006, 129 (1-3): : 135 - 138
[6] Strong nonlinear current-voltage behaviour in perovskite-derivative calcium copper titanate
Chung, SY
Kim, ID
Kang, SJL
[J]. NATURE MATERIALS, 2004, 3 (11) : 774 - 778
[7] Extrinsic models for the dielectric response of CaCu3Ti4O12
Cohen, MH
Neaton, JB
He, LX
Vanderbilt, D
[J]. JOURNAL OF APPLIED PHYSICS, 2003, 94 (05) : 3299 - 3306
[8] Dielectric behaviour of Hf-doped CaCu3Ti4O12 ceramics obtained by conventional synthesis and reactive sintering
de la Rubia, M. A.
Leret, P.
del Campo, A.
Alonso, R. E.
Lopez-Garcia, A. R.
Fernandez, J. F.
de Frutos, J.
[J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2012, 32 (08) : 1691 - 1699
[9] Polyacrylamide gel: an efficient tool for easy synthesis of multicomponent oxide precursors of ceramics and glasses
Douy, A
[J]. INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 2001, 3 (07): : 699 - 707
[10] Evidence of the internal domains for inducing the anomalously high dielectric constant of CaCu3Ti4O12
Fang, TT
Liu, CP
[J]. CHEMISTRY OF MATERIALS, 2005, 17 (20) : 5167 - 5171

← 1 2 3 →