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《Precious Metals》 2015-03
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Study on Preparation of Super-Pure Silver

LIU Dan;LI Yitao;HE Xin;XIONG Xiaodong;Beijing Engineering Research Center of High Purity Metal Sputtering Target, Grikin Advanced Materials Co.LTD.;General Research Institute for Nonferrous Metals;  
6N super-pure silver was prepared by the electrolytic refining method; the factors that influence the silver particle size and purity, such as the silver concentration, the current density, the current distribution, and reaction temperature were discussed. 201, D301 ion exchange resins were selected for electrolyte purification impurity by theoretical analysis, the silver powder morphology was characterized by SEM, and the impurities were analyzed by GDMS. The results showed that 6N super-pure silver in which the total content of impurities was less than 1×10-6 could be obtained by the following conditions, the silver content in the electrolyte was 500~540 g/L, the current density was 600~1000 A/m2, the temperature was 30~40℃, and the homopolar distance was 10 cm, the porous titanium mesh was used as the cathode.
【Fund】: 国家科技支撑计划(2012BAE06B06)
【CateGory Index】: TF832
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