Method of making a solar energy collector element
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United States of America Patent
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Dec 25, 1984
Issued Date -
N/A
app pub date -
Jun 2, 1982
filing date -
Jun 4, 1981
priority date (Note) -
Expired
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Abstract
There is disclosed a method of making a solar energy collector element which comprises the step of forming a carbon containing film on at least the sunlight receiving surface of a substrate which is made of an iron metal material, and then heat-treating at least the sunlight receiving surface in an oxidizing atmosphere. The solar energy collector element made by the method of the present invention is superior in selective absorption characteristics for the solar energy and inexpensive in manufacturing.
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