INFLUENCE OF ELECTROLYTE COMPOSITION AND ITS TEMPERATURE ON THE PROPERTIES OF Sn-Co POWDER
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2021-01-01
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Abstract
The conditions for electrodeposition of Sn-Co powders in a fluoride-chloride electrolyte with different Co2+/Sn2+ ratios have been determined. Both, the effect of electrolyte temperature and the value of the initial current density on the morphology, component and phase composition of Sn-Co powders, were investigated. A wide range of powder compositions, depending on the increase of Co2+/Sn2+ ratio, was obtained - from 7 wt. % Co to over 85 wt. % Co. The deposited Sn-Co powders are characterized by a very diverse morphology, which varies from needle-like and cross-linked in the Sn-enriched powders to typically dendritic in Co-enriched ones. By increasing the electrolyte temperature from 20oC to 60oC, the share ofparticles with a size of about 5 - 10 µm reaches above 50 %. The main elements (tin, cobalt and oxygen) are evenly distributed in the structure of the individual particles.