Dielectric properties of Bi4-xLaxTi3O12 (0 ≤ x ≤ 2) ceramics

被引：13

作者：

Hou, RZ ^{[1
]}

Chen, XM ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF ELECTROCERAMICS | 2003年 / 10卷 / 03期

关键词：

Bi4-xLaxTi3O12; ceramics; dielectric properties; phase transition; CRYSTAL;

D O I：

10.1023/B:JECR.0000011218.75520.d3

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：

The dielectric properties of the Bi4-xLax Ti3O12 (0 less than or equal to x less than or equal to 2) ceramics were characterized and discussed together with the P-E relation ( polarization vs. electric field). With increasing x, the P-E relation changed from normal ferroelectric hysteresis loops to pure linear relation, which indicated that La3+ substitution for Bi3+ in Bi4Ti3O12 induced a phase transition from ferroelectric to paraelectric state at ambient temperature. Low loss dielectric ceramics with temperature stable dielectric constant were obtained for x > 1.2 in Bi4-xLax Ti3O12 at 1 MHz. And the loss increased in all the compositions when the ceramics were measured at microwave frequencies.

引用

页码：203 / 207

页数：5

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