Electrodeposition of Zn–Sb Alloy Film from Ethylene Glycol Solvent

概要

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The electrodeposition of Zn–Sb alloy from ethylene glycol (EG) solvent was investigated. ZnCl2 and SbCl3 or antimony potassium tartrate (APT) were used as zinc and antimony ion sources, respectively. The phases deposited from the EG-ZnCl2–SbCl3 (85.0:14.7:0.3 mol%) bath at 393 K were hcp Zn containing little amount of Sb or elemental Sb and it was difficult to control the composition of Zn–Sb alloy. In contrast, Zn–Sb alloys containing 2.0∼71.6 mol% Zn were obtained from the EG-ZnCl2-APT (85.0:13.6:1.4 mol%) bath at the constant current densities of 50∼300 A m－2 at 393 K. Amorphous-like Zn–Sb alloys having a composition near Zn4Sb3, which is expected as a thermoelectric material with a high figure of merit, were obtained by the electrodeposition at current densities of 150∼300 A m－2 in this bath.