Inorganic acid based collosol for preparing solar energy photo-thermal conversion absorbing membrane

Abstract

The invention provides an inorganic acid based collosol for preparing a solar energy photo-thermal conversion absorbing membrane: the collosol is prepared from the raw materials of organic or inorganiThe invention provides an inorganic acid based collosol for preparing a solar energy photo-thermal conversion absorbing membrane: the collosol is prepared from the raw materials of organic or inorganic aluminium salt, nickel salt and chelating agent, wherein the raw materials are processed by the steps of alcoholysis and condensation reaction in ethanol or fatty alcohol, inorganic acid is used asc aluminium salt, nickel salt and chelating agent, wherein the raw materials are processed by the steps of alcoholysis and condensation reaction in ethanol or fatty alcohol, inorganic acid is used aspeptizing agent for preparing aluminum collosol, and the aluminum collosol needs to be mixed with nickel collosol to prepare mixed collosol. The invention has the advantages of simple preparation methpeptizing agent for preparing aluminum collosol, and the aluminum collosol needs to be mixed with nickel collosol to prepare mixed collosol. The invention has the advantages of simple preparation method and easy raw material acquisition, the prepared membrane can be used for a thermal collection absorbing layer for the solar energy photo-thermal conversion, and the invention has low cost and doesod and easy raw material acquisition, the prepared membrane can be used for a thermal collection absorbing layer for the solar energy photo-thermal conversion, and the invention has low cost and doesnot pollute the environment.not pollute the environment.

Description

A sol for preparing solar light-to-heat conversion absorbing films based on inorganic acids technical field The invention belongs to the technical field of functional materials, and more specifically relates to a solar light-to-heat conversion absorbing film sol prepared based on inorganic acid. Background technique For decades, solar spectrum selective absorption films have been a very active research topic in the field of solar thermal utilization technology. At present, the industrialized solar spectrum selective absorption thin film is mainly prepared by magnetron sputtering method. Since this method requires high vacuum, it requires expensive production equipment and high equipment maintenance costs, and the input cost is large, which limits Promotion of solar thermal utilization. Nickel-alumina composite film is a kind of cermet film, which has good selective absorption, and is generally used in the absorbing layer of solar light-to-heat conversion. At present, the...

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Problems solved by technology

In addition, it is also reported that the film is prepared by sol-gel method. The sol is prepared by aluminum tri-sec-butoxide and nickel 2-ethylhexanoate, which is calcined at 1200°C to form NiAl2O4, and then reduced by H2 at 950°C for 5 hours[ J.Appl.Phys., 821189-1195 (1997)], this method cost is higher, also has danger