Controlled Electrochemical Synthesis Of Ultrafine Metal Oxide Powders

The electrolyzing method in both chambers divided by anion-exchanging membrance is studied in the paper, analyzing preparation conditions of nanoscale oxides made of different ions of Zn²⁺, Al³⁺, La³⁺ and Mg²⁺, discussing the relations of the preparation conditions of ionic electrode potential, current density, disperser, calcining temperature to the influence of prepatation technology of nanoscale oxides. The nanoscale materials are characterized by using the methods of TEM,TG-DTA,XRD and UV. Its preparation mechanics is investigated in the paper.Anion-exchanging membrane is used as membrane to form the stable precipitation environment in process of controllably electrolyzing in the both chamber. The productive deposition speed is controlled by the electrolyzing speed to form certain extent supersaturation of crystal nucleus, which is more important for forming nanoscale oxides. The preparation environment of uniform and nanoscale oxides particles is obtained without adding disperser. The variant current density is vital to the preparation of nanoscale oxides.Electricity potential of oxidizing and deoxidizing of metal ions and the system of preparing solution are chosen fitly to avoid deoxidization of metal ions on cathode by controlling electrolytic reaction in the different solution system. The fact that the system of preparing solution which is used to make nanoscale oxides is seleced properly to realize the aiming reactions is confirmed by by the experiments.The predecessors of nanoscale oxides produced by the controllably electrolyzing deposition method can be made to form oxides of different sizes and crystal groups under different heat temperatures. With calcined temperatures rising, the size of oxide particles will be augmented and crystal group will be perfected, thus one of the most important factors of making nanoscale materials can't be ignored by making sure of calcined temperatures.