Element Separation And Analysis Of Rare Earth Impurities And Nano Y <sub> 2 </ Sub> The O <sub> 3 </ Sub> Prepared Research

In this thesis, the optimum micro emulsion system has been adopted to extract and separate impurity elements: iron, zinc, nickel and copper. The influence of the duration of oscillation, balance aqueous phase acidity and temperature on the extraction performance has been investigated and the optimum conditions for the impurity elements extraction and separation was determined. The micro emulsion of Cyanex272 with heptane and hydrochloric acid showed good extraction performance for impurity elements iron, zinc, nickel and copper in Nd₂O₃, Y₂O₃, Pr₆O₁₁ and Er₂O₃, while its extraction effect for impurity element sodium is not obviously. With the increase of the duration of oscillation and temperature of balance aqueous phase, the distribution ratio of impurity elements increased also. The content of the impurity elements iron, zinc, sodium, nickel and copper in rare earth oxides after extraction has been investigated by flame atomic absorption spectrometry. The optimum operating conditions of the instrument has been determined and the influence of the different matrix modifier and the acidity has been analyzed. The content of the above five impurity elements has been successfully measured by the air-acetylene flame atomic absorption method under the optimum operating conditions. The linearity range is about 0.0-1.2μg/g and the tagged recovery percentage is about 80%-120%. The relative standard deviation is less than 3%The nanometer Y₂O₃ has been prepared by Triton X-100, the normal butyl alcohol, the cyclo-hexane and the water-soluble fluid microemulsion system, which forms "the micro reactor" by the reverse micellar micro emulsion. The obtained Y₂O₃ nanometer microlites showed good monodispersity and its granularity was less than 50 nm. The quantity of normal butyl alcohol,the concentration of Y(III) to the nanometer micrite influence was discussed as well as the scorching hot temperature,concentraction of Y(NO₃)₃ to granularity .The size and the morphology were observed by TEM. The distribution of size was determined by a granulometer and the specific surface area was measured by a specific surface analyzer and XRD.The result can provide helpful information on extraction, analysis, determination the impurity elements in rare earth and nanometer material preparation.