Composite Pyroelectric Materials.
Final technical rept. 1 Jul 78-30 Sep 79,
PENNSYLVANIA STATE UNIV UNIVERSITY PARK MATERIALS RESEARCH LAB
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Pyroelectric materials develop electric charge with temperature change. They are used in thermal device applications such as surveillance, burglar alarms and vidicon night-image systems. Greater pyroelectric sensitivity is needed for many vidicon applications. We are exploring ways of increasing the pyroelectric figure-of-merit pyroelectric coefficientpermittivity through the use of composite materials. In this report we discuss the results of work carried out at Penn State and at the North American Philips Laboratory Dr. J. Dougherty and Dr. W. Smith. The design principles and experimental data for a model system are described in the section entitled Pyroelectric PZT composites. For PZT-Spurrs composites with parallel connectivity, the pyroelectric figure-of-merit is more than five times larger than for a poled PZT ceramic.
- Laminates and Composite Materials