Preparing of Barium Titanate Using Chemical Method and Studying of Its Structural Properties

Single crystalline BaTiO3 (BT) was prepared using TiCl4, BaCl2 and oxalic acid. The structure of the prepared nanocrystalline BT powders were a tetragonal perovskite according to XRD and HRTEM analysis. Annealing powder to 750oC show that pure BT phase was formed according to XRD, TG, and FTIR spectroscopy. The TEM images of the prepared powder reveal spherical morphology of BT, while a finger twin, dendritic and embryo shape are observed of BT powder calcined at 230, 530, and 750oC respectively. SAED and HRTEM images showed a high crystalline BT powder and a single crystalline BT respectively

A Study of Optical and Thermal Properties of (TeO_2-MoO_3-ZnO) Semiconducting Oxid Glass

produced a standard series of semiconducting tellurite oxide glasses containing vanadium and molybdenum oxides based on ), where X = 10, 15, 20, 25, 30 (mol-%) including quenching method. The influence of MoO3 on the glass transition temperature and photofission energy of this kind was analyzed. The thermal parameters of the used glasses, such as transition temperature (Tg) and thermal stability, were measured using the differential scanning calorimetry (DSC) method. Optical gap energy ( and end () were evaluated as a function of (ZnO) content in the glass. It was found that   decreased with the increase of ZnO content, while ZnO content increased. Infrared and Raman spectroscopy, X-ray diffraction and scanning electron microscopy were examined and analyzed as a function of ZnO content in different compositions of such glasses