Composite Pyroelectric Materials
Abstract
New types of composite materials and various single crystal materials were studied for pyroelectric applications. The pyroelectric figure of merit (p/ K) was measured using a fully automated direct (Byre-Roundy) and Chynoweth system built during the past year. Composites of ferroelectric oxides such as PZT, boracites, lead germanate with the polymer spurrs were fabricated. In PZT- Spurrs composites, the pyroelectric figure of merit p/K was improved by a factor of 7 over that of solid PZT. Boracites:Spurrs and Lead Germanate:Spurrs composites possess p/K values equivalent to the figure of merit of their respective single crystalline forms. A new technique was developed to fabricate oriented glass-ceramic pyroelectric targets using large temperature gradients across the glass disk. Pyroelectric figures of merit for recrystallized Li2Si2O5, Ba2Ge2TiO8 and Ba2Si2TiO8 were up to 60% of the single crystal values. Single crystals of antimony sulfur iodide, lithium silicate, lithium germanate, and resorcinol were studied for their potential applications in the pyroelectric devices. SbSI family members have some potentials as oblique-cut targets at low temperatures.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1980
- Accession Number
- ADA098996
Entities
People
- A. S. Bhalla
- Robert E. Newnham
Organizations
- Pennsylvania State University