Crystallization and Microstructural Control of Ferroelectric Thin-Films and Glass-Ceramics.
Abstract
Research on solution-derived ferroelectric thin-films and melt-derived ferroelectric glass-ceramics was conducted in parallel with considerable overlap in the compositions studied and the evaluations of the crystallization behavior, microstructural development, and resulting properties. Lead germane based ferroelectric thin films were developed with a room temperature pyroelectric coefficient over 90% of the single crystal value, and a pyroelectric figure of merit exceeding the highest reported value for oriented lead titanate films. New glass-ceramic compositions were developed based on the crystallization of ferroelectric phases of lead zirconate titanate and lead zinc niobate in lead borosilicate glass matrices. The compositions in glass powder form densified at temperatures less than 900 deg C by a combination of viscous and liquid phase sintering mechanisms. Crystallization of an interconnected microstructure of the ferroelectric phases was critical to produce ferroelectric properties, and allow electrical poling for piezoelectric and pyroelectric activity. This research demonstrates the feasibility of developing ferroelectric glass-ceramic compositions with low processing temperatures that utilize powder processing techniques, such as pressing, screen printing, or tape casting, and indicates the potential incorporation of these materials into multi-component microelectronic packages as sensors and actuators.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 31, 1998
- Accession Number
- ADA337154
Entities
People
- Michael J. Haun
Organizations
- Colorado School of Mines