ULTRA-FINE PARTICLE SIZE FERROELECTRICS
Quarterly progress rept. no. 4, 16 Jan-15 Apr 1963
HORIZONS RESEARCH INC CLEVELAND OH
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This report describes work done during the fourth quarterly contract period for the project Ultra Fine Particle Size Ferroelectrics which is directed to the preparation of controlled particle size polycrystalline dielectric films of ferroelectric materials and also to theoretical studies of the phenomena associated with the changes in electrical properties which occur when the particle size of ferroelectric materials is reduced below certain levels. Studies were directed to the preparation of dense films of barium titanate of the order of 10 microns thick, by the pyrolysis, in situ, of mixed organic compounds of barium and titanium on various electroded substrates. With the aid of direct x-ray diffraction analysis of the films, the formation of barium titanate was followed as a function of the firing temperature. It was found that coherent polycrystalline films of pure BaTiO3 could be formed at temperatures as low as 1100 F, having crystallite sizes less than 0.5 microns, and containing no additives to inhibit grain growth.
- Electricity and Magnetism