Effect of sintering conditions on the dielectric properties of CaCu3Ti4O12 and La2/3Cu3Ti4O12 ceramics:: A comparative study

被引：82

作者：

Prakash, B. Shri ^{[1
]}

Varma, K. B. R. ^{[1
]}

机构：

[1] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India

来源：

PHYSICA B-CONDENSED MATTER | 2006年 / 382卷 / 1-2期

关键词：

ceramics; microstructure; giant dielectric constant; dielectric relaxation; dielectric loss; complex modulus analysis;

D O I：

10.1016/j.physb.2006.03.005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The microstructural and dielectric properties of La2/3CU3Ti4O12 (LCTO) ceramics were found to be less sensitive to the sintering conditions. In contrast, these had imprinting effects on the dielectric characteristics of CaCu3Ti4O12 (CCTO) ceramics. The dielectric constant of CCTO increased drastically with increase in sintering temperature and duration as a consequence of significant change in the microstructural and compositional heterogeneity, while the increase was nominal in the case of LCTO ceramics. The dielectric behavior of both the ceramics was explained based on the Maxwell-Wagner relaxation arising mostly from the interfaces between grains and the grain boundaries. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：312 / 319

页数：8

共 18 条

[1]

Adams TB, 2002, ADV MATER, V14, P1321, DOI 10.1002/1521-4095(20020916)14:18<1321::AID-ADMA1321>3.0.CO

[2]

2-P

[3] The effect of processing on the giant dielectric properties of CaCu3Ti4O12 [J].

Bender, BA ;

Pan, MJ .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2005, 117 (03) :339-347

[4]

Fang TT, 2004, J AM CERAM SOC, V87, P2072, DOI 10.1111/j.1151-2916.2004.tb06362.x

[5] Giant barrier layer capacitance effects in the lithium ion conducting material La0.67Li0.25Ti0.75Al0.25O3 -: art. no. 043110 [J].

García-Martín, S ;

Morata-Orrantia, A ;

Aguirre, MH ;

Alario-Franco, MA .

APPLIED PHYSICS LETTERS, 2005, 86 (04) :043110-1

[6] IMPEDANCE AND DIELECTRIC-SPECTROSCOPY REVISITED - DISTINGUISHING LOCALIZED RELAXATION FROM LONG-RANGE CONDUCTIVITY [J].

GERHARDT, R .

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1994, 55 (12) :1491-1506

[7]

Hippel V, 1954, DIELECTRICS WAVES

[8] Optical response of high-dielectric-constant perovskite-related oxide [J].

Homes, CC ;

Vogt, T ;

Shapiro, SM ;

Wakimoto, S ;

Ramirez, AP .

SCIENCE, 2001, 293 (5530) :673-676

[9] Giant dielectric permittivity observed in Pb-based perovskite ferroelectrics [J].

Kim, BG ;

Cho, SM ;

Kim, TY ;

Jang, HM .

PHYSICAL REVIEW LETTERS, 2001, 86 (15) :3404-3406

[10] Dielectric properties and Maxwell-Wagner relaxation of compounds ACu3Ti4O12 (A = Ca,Bi2/3,Y2/3,La2/3) -: art. no. 093703 [J].

Liu, JJ ;

Duan, CG ;

Mei, WN ;

Smith, RW ;

Hardy, JR .

JOURNAL OF APPLIED PHYSICS, 2005, 98 (09)

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