Dendrite formation and electrocrystallization of silver from molten salts

✍ Scribed by A.M.Shams El Din; G. Wranglén

• Publisher: Elsevier Science
• Year: 1962
• Tongue: English
• Weight: 1023 KB
• Volume: 7
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(62)80018-8

✦ Synopsis

The morphology of silver dendrites deposited from nitrate and chloride melts, the latter with various additions, was studied in a manner similar to that employed in a previous investigation in aqueous solutions. Two growth directions for the dendrites were found, [110] and [112]. Different combinations of these directions gave a great many different types of dendrites. The addition of an indifferent salt (NaNOs) to the nitrate melt, as well as the current, had little influence on dendrite morphology. Increasing the temperature resulted in a transition from [110] to [112] dendrites at about 325°C. In the chloride melt operated at 473°C the dendrite propagated mainly along the [112] direction, although branches could develop also along [110]. The addition of various anions and cations to a chloride melt showed no noticeable influence on dendrite morphology. This is in accordance with the expected low inhibition sensitivity in electrodeposition from fused salts.

All dendrites obtained had the f.c.c, lattice; the crystal faces were invariably (111). On this face, thick growth layers could be observed, developing in the same manner as in deposition from aqueous solutions.