Abstract
ABSTRACTPZT and PLZT powders were prepared from nitrate and chloride precursors in a continuous constant volume precipitator. After precipitation, the powders were dried by a variety of methods, including: spray-drying, freeze-drying (in liquid nitrogen), and centrifugal freeze-drying. Spraydried powders were found to have a spherical morphology, and to be solid. The particle size was in the micron range. Powders dried by nitrogen freezedrying were characterized by an open morphology of agglomerated platelets. For centrifugally freeze-dried powders, particle size analyses were found to fit a population balance model, giving crystallite, cluster, and agglomerate population densities and growth rates.
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