IMPROVEMENT OF LEAD TITANATE CERAMIC FOR INFRARED DETECTORS

被引：10

作者：

MENDIOLA, J ^{[1
]}

ALEMANY, C ^{[1
]}

DEFRUTOS, J ^{[1
]}

机构：

[1] EUIT TELECOMUN,E-28031 MADRID,SPAIN

来源：

SENSORS AND ACTUATORS A-PHYSICAL | 1993年 / 37-8卷

关键词：

D O I：

10.1016/0924-4247(93)80089-Y

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A method to increase the figure of merit [gamma/(epsilon'epsilon0C(E))] is proposed for calcium-modified lead titanate ceramic (24% Ca). By subjecting the ceramic to electric poling reversal up to ten times, a controlled microcracking state is caused, with a considerable decrease of the dielectric permittivity, epsilon', and a moderated decrease of the pyroelectric coefficient, gamma. These changes amount to an actual uncoupling of epsilon' and gamma. Therefore, an increase of the voltage response V(rms) close to 50% should be obtained. By measuring with a single-element detector prepared with a sample thus treated, the responsivity and the detectivity are proved to be in agreement with the prediction.

引用

页码：516 / 518

页数：3

共 9 条

[1] PURE AND CALCIUM-MODIFIED LEAD TITANATE CERAMICS FOR PYROELECTRIC SENSORS [J].