Method of manufacturing absorption layers for solar energy syste

Details Method of manufacturing absorption layers for solar energy syste Method of manufacturing absorption layers for solar energy syste

1982-08-04

1984-09-25

Kaplan, G. L.

Chemistry: electrical and wave energy

Processes and products

204 48, 204 49, C25D 312, C25D 356

Patent

active

044734476

ABSTRACT:
Method for manufacturing solar absorption layers by electrodeposition of heavy metals, such as Ni and Co, from aqueous citrate solutions. The heavy metal citrates are produced by direct reaction of metal oxides or carbonates with citric acid. The electrolyte concentration is a maximum 5% and has a pH of between 8 and 11. The deposition process takes place at room temperature, bath voltages of 8 to 30 V, and current densities of 3 to 10 A/dm.sup.2. The layers produced by this method are well bonded black layers resistant to temperatures up to 700.degree. C.

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W. A. Wesley et al., "Electrodeposition of Nickel at High Current Density", Reprint 36th Annual Proc. Am. Eletroplaters Soc., pp. 1-16, (1949).

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