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Pyroelectric characteristics of modified barium titanate ceramics

Published online by Cambridge University Press:  31 January 2011

K.K. Deb ,
M.D. Hill  and
J.F. Kelly
K.K. Deb
Affiliation:
CECOM Center for Night Vision and Electrooptics Directorate, Infrared Technology Division, Ft. Belvoir, Virginia 22060-5677
M.D. Hill
Affiliation:
Ceramic Division, Electronic Materials Group, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
J.F. Kelly
Affiliation:
Ceramic Division, Electronic Materials Group, National Institute of Standards and Technology, Gaithersburg, Maryland 20899
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Abstract

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.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 12 , December 1992 , pp. 3296 - 3305
Copyright
Copyright © Materials Research Society 1992

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