High dielectric and nonlinear electrical behaviors in TiO2-rich CaCu3Ti4O12 ceramics

被引：106
作者：
Lin, YH [1 ]
Cai, JN
Li, M
Nan, CW
He, JL
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2006年 / 88卷 / 17期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.2198479
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We present a TiO2-rich CaCu3Ti4O12 polycrystalline ceramic with high dielectric and nonlinear electrical properties. Analysis of the ceramic microstructure and composition indicates that obvious grain boundaries are formed. Our results demonstrate that all the ceramic samples exhibit high dielectric permittivity and remain almost constant over the frequency range from 100 Hz to 1 MHz, which could be attributed to an internal boundary layer capacitance effect. The current-density-electric-field characteristics prove that the excessive TiO2 in the CaCu3Ti4O12 ceramics can efficiently improve varistor voltage and nonlinear coefficient. (c) 2006 American Institute of Physics.
引用
收藏
页数：3
相关论文
共 23 条
[1]   Representations of impedance spectra of ceramics - Part I. Simulated study cases [J].
Abrantes, JCC ;
Labrincha, JA ;
Frade, JR .
MATERIALS RESEARCH BULLETIN, 2000, 35 (06) :955-964
[2]  
Adams TB, 2002, ADV MATER, V14, P1321, DOI 10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO
[3]  
2-P
[4]   High temperature electrical properties of highly epitaxial CaCu3Ti4O12 thin films on (001) LaAlO3 [J].
Chen, L ;
Chen, CL ;
Lin, Y ;
Chen, YB ;
Chen, XH ;
Bontchev, RP ;
Park, CY ;
Jacobson, AJ .
APPLIED PHYSICS LETTERS, 2003, 82 (14) :2317-2319
[5]  
CHEN WEN, 1999, B CHIN CERAM SOC, V4, P18
[6]   Strong nonlinear current-voltage behaviour in perovskite-derivative calcium copper titanate [J].
Chung, SY ;
Kim, ID ;
Kang, SJL .
NATURE MATERIALS, 2004, 3 (11) :774-778
[7]  
Clarke DR, 1999, J AM CERAM SOC, V82, P485
[8]   DIELECTRIC RELAXATIONS IN REDUCED RUTILE (TIO2-X) AT LOW TEMPERATURES [J].
DOMINIK, LAK ;
MACCRONE, RK .
PHYSICAL REVIEW, 1967, 163 (03) :756-&
[9]   First-principles study of the structure and lattice dielectric response of CaCu3Ti4O12 -: art. no. 214112 [J].
He, LX ;
Neaton, JB ;
Cohen, MH ;
Vanderbilt, D ;
Homes, CC .
PHYSICAL REVIEW B, 2002, 65 (21) :2141121-21411211
[10]   Charge transfer in the high dielectric constant materials CaCu3Ti4O12 and CdCu3Ti4O12 -: art. no. 092106 [J].
Homes, CC ;
Vogt, T ;
Shapiro, SM ;
Wakimoto, S ;
Subramanian, MA ;
Ramirez, AP .
PHYSICAL REVIEW B, 2003, 67 (09)
123