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Solar spectrum selective absorbing coating and preparation method thereof

An absorbing coating, selective technology, applied in coatings, solar thermal devices, solar thermal power generation, etc., can solve the problems of low emissivity or thermal stability index, can not meet the needs and other problems, to avoid oxidation problems, improve thermal stability Sexual, colorful effects

Active Publication Date: 2010-06-16
安徽科鑫光热技术有限公司
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Problems solved by technology

[0005] The development of today's society has higher requirements for the comprehensive performance of materials. For the medium and high temperature application of solar absorbing coatings, a single high absorption rate, low emissivity or thermal stability index can no longer meet the demand. New materials with performance, appearance, and environmental compatibility

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  • Solar spectrum selective absorbing coating and preparation method thereof
  • Solar spectrum selective absorbing coating and preparation method thereof

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Embodiment Construction

[0018] The preparation of Cu / TiNbN / TiNbON / SiON is taken as an example below, which is only used to illustrate the present invention, but not to limit the present invention.

[0019] See figure 1 As shown, a solar spectrum selective absorbing coating of the present invention is prepared by magnetron sputtering technology, and the surface of the heat absorbing body substrate forms a three-layer film structure from the bottom to the top, and its composition and proportion are as follows:

[0020] The first layer is made of 0.5mm thick copper sheet as the infrared reflection layer; the second layer is the absorption layer, which includes two sublayers (ie, the first sublayer and the second sublayer) of the metal-like layer and the dielectric-like layer, and the metal-like layer It is composed of metal titanium, niobium mixed with titanium nitride and niobium nitride, the thickness is 90nm, and the metal phase volume ratio is 60%. The dielectric-like layer is composed of metal phas...

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Abstract

The invention relates to a solar spectrum selective absorbing coating which is prepared by adopting magnetron sputtering technology. The absorber of the coating comprises the following three layers of films from substrate to top: a first layer adopts copper with infrared reflectivity or aluminium substrate as an infrared reflecting layer; a second layer uses a metalloid layer and a medium type layer which have different refractive indexes and thicknesses; and a third layer uses SiON film as an antireflection layer. The preparation method comprises the following steps: the first layer (infrared reflecting layer): cleaning copper or aluminium sheets with ultrasonic wave or polishing the copper or aluminium sheets; the metalloid layer of second layer: using two metals as alloy target, argon gas as sputtering gas and nitrogen gas as reaction gas and adopting DC electrical source to perform reactive sputtering; the medium type layer of the second layer: using two metals as alloy target, argon gas as sputtering gas and nitrogen and oxygen gas as reaction gas and adopting DC electrical source to perform reactive sputtering; the third layer (antireflection layer): uses SiN as target, argon gas as sputtering gas and nitrogen and oxygen gas as reaction gas and adopting radio frequency power source to perform reactive sputtering; and finally obtaining the absorber.

Description

Technical field: [0001] The invention relates to the field of solar light-to-heat conversion, in particular to a medium-high temperature solar spectrum selective absorption coating and its preparation technology. Background technique: [0002] Along with the increasingly severe energy and environmental problems, the utilization of solar energy has become a research hotspot of governments in various countries. Among them, the photothermal conversion of solar energy is a part of solar energy utilization that has relatively optimistic application feasibility and prospects but relatively weak research (there are three forms of solar energy utilization : Photo-electricity, i.e. solar cells; photo-chemistry, i.e. photocatalysis; photo-thermal, direct use of solar heat radiation). [0003] The core material to realize solar photothermal conversion is the solar spectrum selective absorption coating, which has a high absorption rate (α) at ​​0.3-2.5 μm, and has a low emissivity in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48C23C14/35B32B9/04
CPCY02E10/40
Inventor 王聪刘宇薛亚飞
Owner 安徽科鑫光热技术有限公司
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