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1 results

  • Nickel-Phosphorous Development for Total Solar Irradiance Measurement

  • F. Carlesso, L. A. Berni, L. E. A. Vieira, G. S. Savonov, M. Nishimori, A. Dal Lago, E. Miranda
  • Journal:
    Proceedings of the International Astronomical Union / Volume 12 / Issue S328 / October 2016
    Published online by Cambridge University Press:
    12 September 2017, pp. 221-223
    Print publication:
    October 2016
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  • The development of an absolute radiometer instrument is currently a effort at INPE for TSI measurements. In this work, we describe the development of black Ni-P coatings for TSI radiometers absorptive cavities. We present a study of the surface blackening process and the relationships between morphological structure, chemical composition and coating absorption. Ni-P deposits with different phosphorous content were obtained by electroless techniques on aluminum substrates with a thin zincate layer. Appropriate phosphorus composition and etching parameters process produce low reflectance black coatings.