用盐酸溶液电沉积法制备Bi/sub - 2-x/Sb/sub -x/ Te/sub - 3/厚热电薄膜

Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589) Pub Date : 2001-06-08 DOI:10.1109/ICT.2001.979897

M. Nedelcu, M. Sima, T. Vişan, T. Pascu, I. Franga, F. Craciunoiu

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引用次数: 9

摘要

提出了电沉积制备成分调制Bi/sub - 2-x/Sb/sub -x/ Te/sub - 3/合金的方法。该电解质由HCl 6M (pH = 0)水溶液组成，可以在室温下在玻碳、铂或镍电极上完成铋、锑和碲的共沉积。研究了薄膜的组成、晶体结构和形貌随电化学参数和镀液组成的变化规律。结果表明，电沉积为单相，呈现多晶态。热电性能好的薄膜的电阻率为7 ~ 10 m/spl ω /cm，电沉积速率为30 ~ 50 /spl mu/m/h。

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Bi/sub 2-x/Sb/sub x/Te/sub 3/ thick thermoelectric films obtained by electrodeposition from hydrochloric acid solutions

A method to produce composition modulated Bi/sub 2-x/Sb/sub x/Te/sub 3/ alloys by electrodeposition has been developed. The electrolyte, which consists in a HCl 6M (pH = 0) aqueous solution, allows the codeposition of bismuth, antimony and tellurium to be accomplished at room temperature on glassy carbon, platinum or nickel electrode. The composition of the films, their crystal structures and morphology were studied as function of electrochemical parameters and bath composition. It is shown that the electrodeposits are monophasic and exhibit a polycrystalline state. The electrical resistivity was of the order of 7-10 m/spl Omega/cm, whereas the electrodeposition rate value was 30-50 /spl mu/m/h for the films with good thermoelectric properties.

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Proceedings ICT2001. 20 International Conference on Thermoelectrics (Cat. No.01TH8589)

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