Effects of grain modification on the dielectric properties of A0.03Ti0.10Ni0.87O (A:K+,Mg2+,Y3+) ceramics

被引：9

作者：

Cheng, Bo ^{[1
]}

Lin, Yuan-Hua ^{[1
]}

Mei, Ao ^{[1
]}

Cai, Jing-Nan ^{[1
]}

Nan, Ce-Wen ^{[1
]}

He, Jinliang ^{[2
]}

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 | 2008年 / 92卷 / 14期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2900966

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We prepared K+-, Mg2+-, and Y3+-doped Ni-Ti-O polycrystalline ceramics by chemical synthesis combined with a traditional ceramic processing. Analysis of the microstructure and phase composition reveals that a core/shell structure can be observed and NiTiO3 phase exists as the grain boundary. Our results indicate that K+, Mg2+, and Y3+ doping have remarkable influence on the dielectric properties of these NiO-based ceramics, which should be mainly attributed to the large variation of the activation energies of the conductivity in the grain interiors. The special core/shell structure and related interfacial polarization are responsible for the observed high dielectric behavior. (C) 2008 American Institute of Physics.

引用

页数：3

共 11 条

[1] SMALL-POLARON VERSUS BAND CONDUCTION IN SOME TRANSITION-METAL OXIDES [J].

BOSMAN, AJ ;

VANDAAL, HJ .

ADVANCES IN PHYSICS, 1970, 19 (77) :1-&

[2] Controlling interface characteristics by adjusting core-shell structure [J].

Chang, HY ;

Cheng, SY ;

Sheu, CI .

ACTA MATERIALIA, 2004, 52 (18) :5389-5396

[3] 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

[4] Electrical properties of the grain boundaries of oxygen ion conductors: Acceptor-doped zirconia and ceria [J].

Guo, X ;

Waser, R .

PROGRESS IN MATERIALS SCIENCE, 2006, 51 (02) :151-210

[5] High dielectric permittivity of Li and Ta codoped NiO ceramics [J].

Hsiao, Yu-Jen ;

Chang, Yee-Shin ;

Fang, Te-Hua ;

Chai, Yin-Lai ;

Chung, Chao-Yu ;

Chang, Yen-Hwei .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 2007, 40 (03) :863-868

[6] Dielectric response of Sr doped CaCu3Ti4O12 ceramics [J].

Li, Wei ;

Schwartz, Robert W. ;

Chen, Aiping ;

Zhu, Jinsong .

APPLIED PHYSICS LETTERS, 2007, 90 (11)

[7] High-permittivity core/shell stuctured NiO-based ceramics and their dielectric response mechanism [J].

Lin, YH ;

Jiang, L ;

Zhao, RJ ;

Nan, CW .

PHYSICAL REVIEW B, 2005, 72 (01)

[8] High permittivity Li and Al doped NiO ceramics [J].

Lin, YH ;

Wang, JF ;

Jiang, L ;

Chen, Y ;

Nan, CW .

APPLIED PHYSICS LETTERS, 2004, 85 (23) :5664-5666

[9] Giant dielectric response and relaxor behaviors induced by charge and defect ordering in Sr(Fe1/2Nb1/2)O3 ceramics [J].

Liu, Y. Y. ;

Chen, X. M. ;

Liu, X. Q. ;

Li, L. .

APPLIED PHYSICS LETTERS, 2007, 90 (19)

[10] Dielectric relaxations in Ca(Fe1/2Nb1/2)O3 complex perovskite ceramics [J].

Liu, Y. Y. ;

Chen, X. M. ;

Liu, X. Q. ;

Li, L. .

APPLIED PHYSICS LETTERS, 2007, 90 (26)

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