Soft-chemical Synthesis And Characterizing Of Nanometer Inorganic Functional Oxides

In this paper, polymer-network method was applied to synthesize different kinds of nanometer inorganic functional oxides including In₂O₃ , MFe₂O₄ (M=Mg,Zn,Fe) and ceria-based solid solutions. Meanwhile, the applicability of using this method to prepare the solid solutions with different composition was also studied. In order to obtain more detailed information about the products synthesized via polymer-network process, some advanced testing techniques such as DSC, XRD, TEM and FT-IR were employed to characterize the gel precursors and products. In this analyzing process, the thermal behavior of the gel precursors was studied and the appropriate temperature for treating the gels could be determined. In addition, the effects of the concentration of starting solution, temperature and time for calcining the gels on the particle size of the products were also discussed. XRD and TEM patterns showed that the superfine powders of nanometer oxides with different particle sizes and even distribution could be synthesized by this method without hard agglomeration. The results of the research also proved that the particle sizes of the powders would increase as the concentration of starting solution, temperature and time for calcining increased. Therefore, under appropriate conditions, products with desirable particle sizes could be synthesized by polymer-network method.