Selective radiation coatings. Preparation and high temperature stability

Panos Kokoropoulos, Ehab Salam, Farrington Daniels

Selective radiation coatings suitable for operation at high temperatures with focused sunlight are described. Coatings of CuO and Co3O4 on polished nickel, silver, and platinum have high absorptivity for solar radiation and low emissivity in the infrared when heated. They are stable at at high temperatures. © 1959.

DOI badge Download BibTeX How to cite Download dataset

Materials
Curve 1
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: CoOₓ (mixture of CoO and Co₂O₃) (0.68 µm thick); Ag (1 mm thick) substrate; substrate treated with acid, highly polished with rouge and cleaned with carbon tetrachloride; electroplated from hot solution of 50 CoSO₄·7 H₂O, 1.5 NaCl, 4.5 H₃BO₃ at 313 K at current density 0.05 amps cm⁻².
Curve 2
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions except 1.2 µm thick.
Curve 3
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to curve 1 specimen and conditions except 1.9 µm thick.
Curve 1
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: CuO (0.24 µm thick); Ag (1 mm thick) substrate; substrate treated with acid, highly polished with rouge and cleaned with carbon tetrachloride; electroplated from a solution of 2.25 CuCN, 3.4 NaCN, and 1.5 Na₂CO₃ at current density 0.003-0.015 amps cm⁻².
Curve 2
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions except 0.28 µm thick.
Curve 3
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to curve 1 specimen and conditions except 0.49 µm thick.
Curve 4
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: CuO (0.24 µm); nickel substrate; substrate treated with acid, highly polished with rouge and cleaned with carbon tetrachloride; electroplated from a solution of 2.25 CuCN, 3.4 NaCN, and 1.5 Na₂CO₃ at current density 0.003-0.015 amps cm⁻².
Curve 5
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to above specimen and conditions except 0.28 µm thick.
Curve 6
Temperature Range, K: 413 Geometry θ': ~0° Composition (weight percent), Specifications and Remarks: Similar to curve 4 specimen and conditions except 0.49 µm thick.