Preparation method for FeMnCuO4 solar energy selective absorption coating

Abstract

The invention provides a preparation method for a FeMnCuO4 solar energy selective absorption coating. According to the preparation method, CuO, Fe2O3, MnO and SiO2 serve as main raw materials; a FeMnCuO4 / silicon polymer absorber is prepared through a two-time-grinding and two-time-sintering solid phase method; FeMnCuO4 / silicon polymer absorber powder is sprayed to a pretreated stainless steel substrate through an electrostatic spraying method; and after heating and solidification, the FeMnCuO4 solar energy selective absorption coating is obtained. The coating prepared through the method has high heat stability (the number of times of the heat shock resistance can be 150 or over, and the costing can be used for a long period under the temperature of 450 DEG C), high absorption rate (the absorption rate can be 95%), low emission rate (the emission rate is about 0.21) and good selective absorption property, the cost of the used materials and the overall preparation method is low, and the preparation method is suitable for mass production, use and popularization.

Description

technical field [0001] The invention relates to a solar absorbing coating, in particular to a FeMnCuO 4 The invention discloses a preparation method of a solar energy selective absorption coating, which belongs to the field of solar heat absorption films. Background technique [0002] In the direct utilization of solar energy, collecting light energy becomes the key in solar energy utilization technology. The purpose of studying solar spectrum selective absorbing coatings is to absorb incident solar energy to the greatest extent, reduce surface radiation heat loss, and solve the problem of high efficiency of solar heat utilization. With chemical treatment, vacuum deposition, electroplating, chemical evaporation deposition, high temperature melting, plasma spraying and other methods, although the prepared coating can be used for the selective absorption surface in higher temperature collectors, the selectivity is good, but Due to the high cost of this method, it is not suit...

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Problems solved by technology

Regarding the research on paint-type spectral selective absorption coatings that are easier to popularize and apply, most of the paint-type solar spectrum selective absorption coatings reported in China use PbS pigments, and PbS is gradually oxidized into white PbS in the air and loses light-to-heat conversion. function; and the heat-resistant temperature of domestic paint-type coatings is low, such as Chinese invention patent (application number: 201010550377.6, application date: 2010.11.19) provides a kind of solar energy medium and high temperature selective absorption coating and preparation, the coating is based on Brass and red copper are used as substrates, and lead sulfide coatings are prepared by reacting equimolar concentrations of thiourea and lead acetate solutions under alkaline conditions using aqueous solution chemistry.

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