| 摘要 |
PURPOSE:To obtain the solar heat abosrbing body excellent in the selective absorption characteristics but stabilized in the color tone thereof by a method wherein a selective absorption film, consisting of at least one of black Cr and black Ni, is formed on the surface of a Ni base of which surface is not flat. CONSTITUTION:The solar heat abosrbing body is consisting of the selective absorption film, consisting of at least one of the black Cr and the black Ni, formed on the surface of the base, of which surface is made of Ni at least and is not flat. The surface of the base is consisting of a nickel film 1 having a leafy or fibrous crytal form, in which a length in an average longer diametral direction is 0.5-2.0mu and the average distance between tip ends of the crystal is 0.5-2.5mu. The surface of the base is consisting of a nickel film 2 having granular crystal form, in which the average graular diameter is 0.1-1mu and the average distance between grains is 0.1-0.4mu. The thickness of the selective absorption film is 0.05-1mu. |
