Electrical Properties of Textured Niobium-Doped Bismuth Titanate Ceramics

被引：8

作者：

Aguiar, Ederson C. ^{[2
]}

Simoes, Alexandre Z. ^{[3
]}

Foschini, Cesar R. ^{[2
]}

Perazolli, Leinig A. ^{[2
]}

Mistler, Richard E. ^{[1
]}

Longo, Elson ^{[2
]}

Varela, Jose A. ^{[2
]}

机构：

[1] Richard E Mistler Inc, Yardley, PA 19067 USA

[2] Sao Paulo State Univ, UNESP Chem Inst, BR-14800900 Sao Paulo, Brazil

[3] Sao Paulo State Univ, UNESP Engn Fac, BR-12516410 Sao Paulo, Brazil

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2012年 / 95卷 / 08期

基金：

巴西圣保罗研究基金会;

关键词：

TEMPLATED GRAIN-GROWTH; SOFT CHEMICAL METHOD; DOMESTIC HYDROTHERMAL MICROWAVE; CA(ZR0.05TI0.95)O-3 THIN-FILMS; ORIENTED BI4TI3O12 CERAMICS; POLYMERIC PRECURSOR METHOD; DIELECTRIC-PROPERTIES; FERROELECTRIC BI4TI3O12; PIEZOELECTRIC PROPERTIES; POLARIZATION REVERSAL;

D O I：

10.1111/j.1551-2916.2012.05234.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Crystallographically textured Nb-doped bismuth titanate ceramics Bi4Ti(3-x)NbxO12, were fabricated by tape casting using plate-like Bi4Ti3O12 particles prepared by a molten-salt method as the templates. The templates were aligned in the fine-grained matrix by aqueous tape casting with their major surface parallel to the casting plane. Effect of niobium on the grain orientation in the material was investigated. It was found that the use of a fine precursor powder led to enhanced densification of the ceramic, while Nb doping reduced electrical conduction and dielectric loss, which enabled poling at high temperatures and high electric fields. The textured Bi4Ti3O12 ceramic showed a high anisotropy in its dielectric properties in the directions parallel and perpendicular to the casting plane. Highly textured BiT was obtained with the use of only 5 similar to wt% of template particles by sintering at 800 degrees C for 1 similar to h.

引用

页码：2601 / 2607

页数：7

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