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Texture of electrolytic Mo deposition from molten alkali halide

N. ENE1,* , C. DONATH1

Affiliation

  1. Romanian Academy – Institute of Physical Chemistry “I. G. Murgulescu” Spl. Independentei 202, 060021 Bucharest, Romania

Abstract

The electrocrysta lization and texture of electrodeposited molybdenum in molten electrolytes has been investigated. Nucleation and growth of molybdenum electrodeposition on nickel electrode in NaCl-KCl-NaF molten electrolyte containing K2MoO4 under potentiostatic and galvanostatic conditions at 1123 K were focused on the influence of electrodeposition conditions on the nucleation phenomena and growth kinetics. Molybdenum initially nucleated and grew according to a three-dimensional diffusion contro led progressive nucleation process and later according to an instantaneous nucleation process. The nucleation density of molybdenum was high on the initial stage of electrolysis producing a fine and uniform electro-deposition. At long time of electrolysis, the nucleation density significantly reduced to about one hundredth of the initial stage and then decreased slightly with increasing electroplating molybdenum time. These investigations suggest that some (unelucidated) inhibition processes and reactions control the growth and texture of molybdenum..

Keywords

Molybdenum, Electrocrystallization, Molten electrolyte, Electrochemical kinetic.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

N. ENE, C. DONATH, Texture of electrolytic Mo deposition from molten alkali halide, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 708-711 (2006)