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Influence of Synthesis Method and the Precursor on the Preparation of Barium Titanate Nano Particles

Sobha A,Sumangala R

Different synthesis routes and different starting precursors can have different effects upon the properties of materials. In this paper, two different methods: solid state method, sol-gel method has been used to prepare BaTiO3 powders. BaCO3, Ba(OH)2.8H2O and [CH3COO]2Ba were used as barium precursor and TiO2, Ti[OCH[CH3]2]4] as titanium precursor. With the help of thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and scanning electron microscope (SEM), the powder characterization has been compared. The results show that sol-gel derived powders are having larger grain growth compared to solid state powders irrespective of starting precursors. It is also evident that dielectric constant value is a function of grain size. Another important findings are starting precursor also plays a major role especially for the grain size and dielectric constant value. The barium hydroxide octahydrate precursor was showing better result than barium acetate precursor.