PYROELECTRIC CHARACTERISTICS OF MODIFIED BARIUM-TITANATE CERAMICS

被引:23
作者
DEB, KK
HILL, MD
KELLY, JF
机构
[1] INFRARED TECHNOL DIV,ELECTROOPT DIRECTORATE,FT BELVOIR,VA 22060
[2] NATL INST STAND & TECHNOL,ELECTR MAT GRP,DIV CERAM,GAITHERSBURG,MD 20899
关键词
D O I
10.1557/JMR.1992.3296
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
BaZrO3 and BaHfO3 modified polycrystalline BaTiO3 are candidate materials for transverse mode and pyroelectric charge coupled device (CCD) arrays. Addition of 3-4% barium zirconate and barium hafnate to barium titanate alters the temperature of phase transformations and with it, dielectric and pyroelectric properties. These additions create a temperature range close to room temperature where the pyroelectric coefficient is extremely high relative to the dielectric permittivity. These materials show a very high figure of merit for dielectric bolometer applications that is competitive with existing materials, while being relatively easy to prepare.
引用
收藏
页码:3296 / 3305
页数:10
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