Synthesis and structure study of ZnCo2O4 spinel prepared via coprecipitation process

ZnCo2O4 spinel was successfully prepared via co-precipitation process starting from corresponding metal chlorides in aqueous solutions at pH=13. Different calcination temperatures (400-500- 600-700-800-1000oC) and different Zn:Co molar ratios (1:2 - 1:2.5) were applied in an effort to prepare this important spinel with perfect specifications starting from cheap, easy to handle inorganic precursors and using a simple process. This process was chosen for its simple requirements and the ability to modify the resulting spinel characteristics by adjusting different parameters easily like mixing temperature, time and speed and the drying conditions. The resulting samples were characterized using x-ray powder diffraction (XRPD), Fourier transform Infra-Red spectroscopy (FT-IR), Differential thermal analysis (DTA). The coloration, crystallinity size, formation and decomposition of the resulting ZnCo2O4 were found to depend on the calcination temperatures, Zn:Co molar ratio and stirring time. Results showed that ZnCo2O4 spinel was formed at relatively low temperatures. All the samples shared a cubic structure with Fd3m space group.

Synthesis of Mo-Fe2O3 by Co-precipitation method and study of its structure and charactreristics

Our research aims to prepare ZnFe2O4 system by CO-precipitation method in aqueous solution,starting from the raw materials, and then studying its structure and properties .After finishing the preparation period, we divided the precipitate in two parts , and then we added to one of them the hydrogen peroxide and then we dried every part alone, grind it and then we heated it at various temperatures for two hours .

Determination some structural characteristic of the compound CuCr2O4

Copper chromite (CuCr2O4) was synthesized by a chemical coprecipitation method. The synthesized samples were characterized using X-ray powder diffraction technology (XRD). The temperature of synthesis was 650°C.