CHARACTERIZATION OF BASNO3 POWDER OBTAINED BY A MODIFIED SOL-GEL ROUTE

A modified sol-gel method is used to prepare stoichiometric, homogeneo us barium stannate powders. The synthesis process is described in deta il in this paper. One of the main characteristics of this process is t hat monophasic powders ave obtained easily at low temperature (1000 de grees C). The resulting powders are characterized by several methods s uch as X-ray diffraction, scanning electron microscopy, X-ray analysis , infrared spectroscopy and thermogravimetric analysis. The different characterizations allow us to conclude that powders obtained by this m ethod contain no impurity. These conclusions show that this process is ideal for obtaining fine powders that will give dense ceramics. (C) 1 997 Elsevier Science Limited.