Dielectric dispersion of CaCu3Ti4O12 ceramics at high temperatures -: art. no. 142901

被引：180

作者：

Zhang, JL ^{[1
]}

Zheng, P ^{[1
]}

Wang, CL ^{[1
]}

Zhao, ML ^{[1
]}

Li, JC ^{[1
]}

Wang, JF ^{[1
]}

机构：

[1] Shandong Univ, Sch Phys & Microelect, Jinan 250100, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 14期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2077864

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

CaCu3Ti4O12 ceramics has been prepared by the conventional solid-state reaction method under different sintering conditions. Dielectric properties have been investigated in the temperature range of 25-350 degrees C within the frequency range of 40 Hz-10 MHz. It has been found that both the dielectric constants and the grain sizes increase with the sintering time. A relaxation has been observed in the frequency range of 100 Hz-100 kHz, apart from the one already known in the frequency range higher than 100 kHz. High-temperature dielectric dispersion shows one large low-frequency response and two Debye-type relaxations. Activation energy values of these two relaxations are 0.084 and 0.678 eV, respectively. An equivalent circuit model is suggested, which well explains the dielectric dispersion. (C) 2005 American Institute of Physics.

引用

页码：1 / 3

页数：3

共 14 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] Role of doping and CuO segregation in improving the giant permittivity of CaCU3Ti4O12 [J].

Capsoni, D ;

Bini, M ;

Massarotti, V ;

Chiodelli, G ;

Mozzati, MC ;

Azzoni, CB .

JOURNAL OF SOLID STATE CHEMISTRY, 2004, 177 (12) :4494-4500

[4] Electric and dielectric properties of pure and doped CaCu3Ti4O12 perovskite materials [J].

Chiodelli, G ;

Massarotti, V ;

Capsoni, D ;

Bini, M ;

Azzoni, CB ;

Mozzati, MC ;

Lupotto, P .

SOLID STATE COMMUNICATIONS, 2004, 132 (3-4) :241-246

[5] Extrinsic models for the dielectric response of CaCu3Ti4O12 [J].

Cohen, MH ;

Neaton, JB ;

He, LX ;

Vanderbilt, D .

JOURNAL OF APPLIED PHYSICS, 2003, 94 (05) :3299-3306

[6] 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

[7] Nonintrinsic origin of the colossal dielectric constants in CaCu3Ti4O12 -: art. no. 172102 [J].

Lunkenheimer, P ;

Fichtl, R ;

Ebbinghaus, SG ;

Loidl, A .

PHYSICAL REVIEW B, 2004, 70 (17) :1-4

[8] Origin of apparent colossal dielectric constants [J].

Lunkenheimer, P ;

Bobnar, V ;

Pronin, AV ;

Ritus, AI ;

Volkov, AA ;

Loidl, A .

PHYSICAL REVIEW B, 2002, 66 (05) :521051-521054

[9] Giant dielectric constant response in a copper-titanate [J].

Ramirez, AP ;

Subramanian, MA ;

Gardel, M ;

Blumberg, G ;

Li, D ;

Vogt, T ;

Shapiro, SM .

SOLID STATE COMMUNICATIONS, 2000, 115 (05) :217-220

[10] CaCu3Ti4O12:: One-step internal barrier layer capacitor [J].

Sinclair, DC ;

Adams, TB ;

Morrison, FD ;

West, AR .

APPLIED PHYSICS LETTERS, 2002, 80 (12) :2153-2155

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