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王晓民,曹海莲,南辉,王志新,喇学伟,张廷安.电解工艺参数对铟微粉纯度和粒度的影响(II)[J].稀有金属材料与工程(英文),2019,48(6):2038~2043.[Xiao-min Wang,Hai-lian Cao,Hui Nan,Zhi-xin Wang,Xue-wei La and Ting-an Zhang.Effect of Electrolytic Process Parameters on the Purity andParticle Size of Indium Powder (II)[J].Rare Metal Materials and Engineering,2019,48(6):2038~2043.]
Effect of Electrolytic Process Parameters on the Purity andParticle Size of Indium Powder (II)
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Received:December 26, 2017  Revised:January 17, 2018
DOI:
Key words: Indium powder  electrolytic process parameter  powder size  powder characterization  current efficiency
Foundation item:青海省“高端创新人才千人计划”资助项目
Author NameAffiliation
Xiao-min Wang,Hai-lian Cao,Hui Nan,Zhi-xin Wang,Xue-wei La and Ting-an Zhang  
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Abstract:
      :The effect of temperature, the distance of electrodes, conductive salt concentration, pH values and kinds of additives on the purity and size of indium powder by electrolysis process was studied. The results show thatThe optimum process parameters for electrolysis are obtained. (The optimum process parameters for electrolysis as follows: The concentration of In3+ is 30g/L, the current density is 130 A/cm2, continuous electrolysis time is 1 hour, the concentration of NaCl is 80g/L, the distance of electrodes is 5cm, thiourea concentration is 0.3g/L, gelatin concentration is 0.5g/L, pH=2.5 and polyvinylpyrrolidone is 0.2g/L). Under these conditions, the distance of electrodees does not affect the purity of the powder, but affect theparticle size of the powder. The concentration of NaCl has the greatest influence on the purity of the powder.The higher temperature of the electrolyte, the particle size becomes larger and the purity of the powder decreases. The additive of thiourea restraining dendrite growth of the powder. Electrolysis 1 hour under the optimum process parameters, indium powder with a grain size of less than 100μm is obtained. The particle size less than 30μm accounted for 75%, the purity of the powder is 99.98%, and the average current efficiency is 70.10%.