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Synthesis by Sol-Gel and Characterization of Strontium Titanate Powder

Abstract. A simple alkoxide hydrolysis route of synthesis of fine crystalline strontium titanate powder is developed. The influence of processing conditions (Sr(OH)2 concentration, stirring time) on the structural and morphological characteristics of the ST powders are presented and analyzed. XRD, SEM and particle size analysis were used to characterize the obtained powders. An average crystallite size is in the range 350800 nm depending on processing parameters. At the same time ultra fine particles with size of about 60 nm and aggregates with size of about 2 μm were observed. The thermal behaviour of powders was analyzed by TGA-DTA and dilatometry. Shrinkage started at 900 C and optimum sintering temperature was achieved ~ 1100 C.