Electrical properties of mn-modified CaBi4Ti4O15 piezoelectrics for high temperature application

被引：7

作者：

Cu Da-Guo ^{[1
]}

Li Guo-Rong ^{[1
]}

Zheng Liao-Ying ^{[1
]}

Zeng Jiang-Tao ^{[1
]}

Ding Ai-Li ^{[1
]}

Yin Qing-Rui ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF INORGANIC MATERIALS | 2008年 / 23卷 / 03期

关键词：

piezoelectric ceramics; Mn-modified; resistivity; CaBi4Ti4O15;

D O I：

10.3724/SP.J.1077.2008.00626

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：

Mn-modified CaBi4Ti4O15 (CBT+x mol% MnCO3) layer-structured piezoelectric ceramics were prepared by the solid state reaction technology. All samples have the same Curie temperature of 780 degrees C, but the dielectric loss at high temperature is remarkably lowered by Mn addition. With increasing content of Mn, the remnant polarization is slightly decreased; the dielectric constant at room temperature decreases from 173 to 162; and the mechanical quality factor increases from 2700 to 4400. The piezoelectric constant d(33) is enhanced from 7 to 14.5. The resistivity of 1.0mol% Mn modified sample is found to be 10(8)Omega center dot cm at 500 degrees C, 50 times higher than that of pure CBT. The Arrehenius plot of Mn-modified CBT is fitted by 3 straight lines, while that of pure CBT is fitted by 2 straight lines. The results suggest that the Mn modified CBT is a potential material for high temperature sensing application.

引用

页码：626 / 630

页数：5

共 26 条

[1] Effects of MnO2 additive on the properties of PbZrO3-PbTiO3-PbCu1/4Nb3/4O3 ferroelectric ceramic system [J].