Low Temperature Synthesis of Zinc-Titanate Ultra Fine Powders

Abstract Development of dielectric materials for microwave frequencies is increasing with rapid progress in mobile and satellite communications systems, where zinc-titanates have found application due to their semi-conducting and dielectric properties. The aim of this work is synthesis of orthotitanate Zn2TiO4 with a spinel structure in low temperature. Starting powder mixtures of ZnO and TiO2, in the molar ratio that is in accordance with the stoichiometry of zinc titanate spinel type Zn2TiO4 and then, Sintered in the range of 1000-1200 °C. After that, for production of ultra fine powder the blend was grinded by fast milling (mechanical activation) for 15 minutes. Microstructural analysis and morphology were characterized by scanning electron microscopy which equipped with energy dispersive X-ray analyzer (SEM/EDS), also for mineral phases distinguishing was used X-Ray diffraction patterns(XRD) and measurement of particles and their distribution was done by Laser particle size analyzer(LPSA). The results indicated reaction between ZnO and TiO2 started above of 1000 °C. According to SEM, XRD and LPSA analysis ultra fine(sub-micron) powder of orthotitanate Zn2TiO4 with spinel structure were obtain.