무전해 도금법을 이용한 코어 셸 구조의 Cu-Ag분말 제조
Preparation of Cu-Ag Powder having Core-Shell Structure by Electroless Plating Method
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초록
Cu-Ag powder having Core-Shell structure was prepared from by electroless plating method using agents such as AgNO3, NH4OH, Hydroquinone. Ag coated copper powders were analyzed using scanning electron microscopy(SEM) and energy dispersive X-ray spectrometer(EDX). The silver coating layer of copper powder was affected from various reaction conditions such as molar ratio of NH4OH, AgNO3, and pulp density. Free silver was generated below 0.1M or 0.3M and above of NH4OH mole ratio. Silver coating layer thickened as addition of AgNO3. When the pulp density reached 12% with 0.2M NH4OH, and 0.15M AgNO3 at 4oC, silver was homogeneously distributed around the copper particles and free silver particles were not generated.
Abstract
Cu-Ag powder having Core-Shell structure was prepared from by electroless plating method using agents such as AgNO3, NH4OH, Hydroquinone. Ag coated copper powders were analyzed using scanning electron microscopy(SEM) and energy dispersive X-ray spectrometer(EDX). The silver coating layer of copper powder was affected from various reaction conditions such as molar ratio of NH4OH, AgNO3, and pulp density. Free silver was generated below 0.1M or 0.3M and above of NH4OH mole ratio. Silver coating layer thickened as addition of AgNO3. When the pulp density reached 12% with 0.2M NH4OH, and 0.15M AgNO3 at 4oC, silver was homogeneously distributed around the copper particles and free silver particles were not generated.
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