Абстрактный

Fabrication and Characterization of Ultrafine Crystalline MgO and ZnO Powders

Dr. Inaam M. Abdulmajeed, Dr. Fadel A. Chyad, Dr. Muna M. Abbas, Hadi Attya Kareem

The design of advanced ceramics depends on the availability of powders with outstanding properties in terms of composition, purity, size, and size distribution. Sol-gel processes allow synthesis powders to have a more elaborate structure. This paper discusses the synthesis of ultra fine particles of ZnO and MgO. At first, fine particles were synthesized by the reaction of Zn (CHCOO3)2 and Mg (CHCOO3)2 with Sodium Hydroxide. The effects of different parameters on particle size and morphology of final ZnO and MgO powders ultra fine powder were optimized by sol gel method. Under optimum conditions, uniformed and homogeneous nanostructured zinc oxide and magnesium oxide powders were obtained with particle sizes of (70–190) and (55-150) nm, respectively. Sol gel monocomponent powders have been obtained in MgO, ZnO. The structures and morphologies of MgO and ZnO particles have been characterized by X-ray diffraction (XRD), scanning probe microscope (SPM) method. Ultra fine sized powders with a tendency towards aggregation have been obtained. The tendency towards crystallization underlines the high reactivity of these powders. Such powders may be used as pigments, catalysts, supports in chromatography or as raw materials for advanced polycrystalline ceramics.