Initial Stage of Growth Process of Lead Titanate Fine Particles

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Abstract
A study on the initial growth stage of lead titanate fine particles with nanometer size is described in this paper. A mixture of the constituent metal alkoxides was hydrolyzed to obtain amorphouslike particles of lead titanate around 5 nm in diameter. The hydrolysate was calcined to crystallize in atmosphere at various temperatures. The volume of the particle increased in proportion to the duration of the calcination. This time dependence is explained by assuming that coalescence occurs at limited areas of the particles such as corners or kinks. The size of as-prepared fine particles was uniform but their distribution became varied as the average size was increased by calcination.