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http://dx.doi.org/10.3740/MRSK.2003.13.9.555

Preparation and Optical Properties of Ag-Coated Cu Powder by Dropping Method of Coating Agent  

Yu, Yeon-tae (Minerals and Materials Processing Division, Korea Institute of Geoscience and Mineral Resources)
Publication Information
Korean Journal of Materials Research / v.13, no.9, 2003 , pp. 555-560 More about this Journal
Abstract
Ag-coated Cu particles were prepared by dropping method of coating agent and were evaluated by scanning electron microscope and color difference meter. The shape of Cu particles having obvious crystal plan and edge was changed spherically according to the increase of Ag coating amount. When the Ag coating amount was 50 wt% to Cu particles, the whiteness of Ag-coated Cu particles was almost similar to that of pure Ag particles. Adding $NH_4$OH in reductant solution could increase effectively the whiteness of the Ag-coated particles. The Ag-coated particles having the highest whiteness was obtained when the content of hydrazine in reductant solution was 0.48 M.
Keywords
Ag-coated Cu particle; conductive paste; whiteness; color change;
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