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High temperature solar absorber coating and method of applying same

  • US 4,268,319 A
  • Filed: 12/26/1979
  • Issued: 05/19/1981
  • Est. Priority Date: 03/01/1978
  • Status: Expired due to Term
First Claim
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1. A composition capable of forming solar absorbing coating having a solar absorptance greater than 0.90 on solar absorbers for solar collectors of the type operable at temperatures above 550°

  • F. comprising;

    an optical filler and a binder in the weight ratio ranging from about 1 to 1 to about 3 to 1, said optical filler having a particle size in the range of from about -100 mesh to about -325 mesh, said optical filler being an inorganic oxide which is thermally stable at operating temperatures above 550°

    F. and which has a solar absorptance greater than about 0.90 at wavelengths of from about 0.35 microns to about 3.0 microns, said inorganic oxide being selected from the group consisting of ferrites, oxides of nickel, cobalt, iron, molybdenum and strontium and mixtures thereof, said binder being an alkyl polysilicate.

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