Solar heat absorber

Abstract

Abstract PURPOSE: To increase the absorption efficiency by forming a selective absorption film having the ratio of thickness of a cuprous oxide layer and that of a cupric oxide layer to 1:0.25W1. CONSTITUTION: A heat collecting base material formed by copper or a copper alloy or a heat collecting base material applied on its surface with a copper plated layer is dipped in a treatment solution such as aqueous alkaline solution of an oxidant such as sodium chlorite or the like, and the ratio of the cuprous oxide layer and that of cupric oxide layer to 1:0.25W1:1, and the thickness of the selective absorption film to 0.15W0.5μm. COPYRIGHT: (C)1982,JPO&Japio

Inventors

• 👤 Masahiko Hatsushiro
• 👤 Seishiro Yamakawa
• 👤 Masaharu Fujii

Bibliographic Details