Influence of Synthesis Method and the Precursor on the Preparation of Barium Titanate Nano Particles
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.
Sobha A,Sumangala R