Abstract
High quality ceramic products, such as transparent electro-optic materials, require better control of chemical composition, powder particle size and morphology, than is offered by conventional mixed-oxide ceramic processing methods. Chemical preparation procedures can be used to prepare powders with the required characteristics of controlled size and morphology.Precipitated hydroxides in the PLZT system (lead lanthanum zirconium titanate) were prepared in a constant volume continuous reactor, following a procedure suggested by Murata, which uses nitrate and chloride precursors, and ammonium hydroxide for pH control. After washing with deionized water, the powders were dried by either spray-drying or freeze-drying in liquid nitrogen.
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