The modified model of the dielectric characteristics for porous Ba0.6Sr0.4TiO3 ceramics

被引：17

作者：

Zhang, Guangzu ^{[1
]}

Jiang, Shenglin ^{[1
]}

Zeng, Yike ^{[1
]}

Zhang, Yangyang ^{[1
]}

Zhang, Qingfeng ^{[1
]}

Yu, Yan ^{[1
]}

机构：

[1] Huazhong Univ Sci & Technol, Dept Elect Sci & Technol, Wuhan 430074, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2009年 / 106卷 / 03期

关键词：

barium compounds; ceramics; grain size; permittivity; porosity; porous materials; strontium compounds; THIN-FILMS; FIELD-DEPENDENCE; TUNABILITY; BIAS;

D O I：

10.1063/1.3183921

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The effect of direct-current (dc) biasing on the dielectric properties of porous Ba0.6Sr0.4TiO3 with various porosities, pore sizes, and different pore shapes has been studied in the paraelectric state. The existing model did not consider the effect of the change in grain size and pore shape, lead to the theory fitting the fine grained or nonspherical pore ceramics less well. The bias equation used in this literature to predict the electric field dependence of permittivity is modified by introducing a coefficient alpha. alpha is the microstructure parameter introduced to depict the influence of grain size and pore shape effect. Taking high porosity samples and nonspherical pore ceramic samples, for example, the modified bias equation gives a better fit to the experimental result in this study.

引用

页数：5

共 25 条

[1] Effect of dc bias on dielectric properties of Cd2Nb2O7 ceramics [J].

Ang, C ;

Bhalla, AS ;

Guo, RY ;

Cross, LE .

JOURNAL OF APPLIED PHYSICS, 2001, 90 (05) :2465-2468

[2] Cluster polarization of Cd2Nb2O7 compound [J].

Ang, C ;

Cross, LE ;

Guo, R ;

Bhalla, AS .

APPLIED PHYSICS LETTERS, 2000, 77 (05) :732-734

[3]

[Anonymous], PHIL MAG

[4] Processing and properties of porous piezoelectric materials with high hydrostatic figures of merit [J].

Bowen, CR ;

Perry, A ;

Lewis, ACF ;

Kara, H .

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2004, 24 (02) :541-545

[5] Low-losses, highly tunable Ba0.6Sr0.4TiO3/MgO composite [J].

Chung, U. -Chan ;

Elissalde, C. ;

Maglione, M. ;

Estournes, C. ;

Pate, M. ;

Ganne, J. P. .

APPLIED PHYSICS LETTERS, 2008, 92 (04)

[6] The influence of Mg doping on the materials properties of Ba1-xSrxTiO3 thin films for tunable device applications [J].

Cole, MW ;

Joshi, PC ;

Ervin, MH ;

Wood, MC ;

Pfeffer, RL .

THIN SOLID FILMS, 2000, 374 (01) :34-41

[7]

DEVONSHIRE AF, 1949, PHILOS MAG, V40, P1040

[8] Ag-Ba0.75Sr0.25TiO3 composites with excellent dielectric properties [J].

Huang, Jiquan ;

Cao, Yongge ;

Hong, Maochun ;

Du, Piyi .

APPLIED PHYSICS LETTERS, 2008, 92 (02)

[9] VARIATION OF DIELECTRIC CONSTANT WITH VOLTAGE IN FERROELECTRICS AND ITS APPLICATION TO PARAMETRIC DEVICES [J].

JOHNSON, KM .

JOURNAL OF APPLIED PHYSICS, 1962, 33 (09) :2826-&

[10] Mg-doped Ba0.6Sr0.4TiO3 thin films for tunable microwave applications [J].

Joshi, PC ;

Cole, MW .

APPLIED PHYSICS LETTERS, 2000, 77 (02) :289-291

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