Solar absorbing film and preparation method thereof

A solar absorbing and absorbing layer technology, applied in the field of solar absorbing films, can solve problems such as low infrared radiation rate, achieve the effects of improving overall performance, ensuring work reliability, and promoting absorption

Inactive Publication Date: 2015-09-23
JIANGSU AOLAN ARCHITECTURE GLASS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This coating absorbs most of the energy in the ultraviolet to near-infrared range of the solar spectrum, strongly reflects the infrared band, and has a very low infrared radiation rate.

Method used

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  • Solar absorbing film and preparation method thereof
  • Solar absorbing film and preparation method thereof
  • Solar absorbing film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of nano-gradient solar spectrum selective absorption film coating by DC magnetron reactive sputtering method:

[0035] Equipment preparation:

[0036] A magnetron sputtering apparatus model JGP500A, which is equipped with three 75mm permanent magnet magnetron targets, and the maximum sputtering power is 500W. A four-station sample turntable with revolution function can realize three-target co-sputtering experiment. The sample can be heated or water-cooled, the maximum temperature can reach 800°C, and the heating rate can be adjusted from 10°C / min to 50°C / min, which is suitable for preparing films of various materials. The vacuum system is mainly equipped with a 2XZ-8 (8L / S) mechanical pump and FF-200 / 1200 vortex molecular pump. The highest vacuum degree can reach 6.010-6Pa. The ultra-high vacuum degree provides a guarantee for the precise control of the film composition .

[0037] Material preparation:

[0038]The sputtering targets are respectively 99....

Embodiment 2

[0046] On the basis of Example 1, the absorbing layer in Example 1 adopts a multi-level layered structure, and alternately deposits multi-layer films. Ni-TiNxOy (Ni) is one cycle, a total of three cycles, modulated into a composition gradient Variations in composite membranes.

[0047] Set 3 samples to precisely control the composition of the absorbing layer through two changes, as shown in samples 1 to 3 in Table 1: change the doping amount of Ni in the absorbing functional layer, and the doping amount gradually decreases from bottom to top; as shown in Table 2 Sample Nos. 4 to 6 show that the ratio of the two sub-layer ceramic absorber layers TiNxOy(Ni) and the metal layer Ni is changed to prepare multilayer composite films with different composition gradients. Then pure AlN was deposited to a thickness of 50 nm. Such as figure 1 Shown: After obtaining the optimal composition gradient film, keep the composition gradient constant, and prepare composite films with different ...

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Abstract

The invention discloses a solar absorbing film. The solar absorbing film comprises a bottom-layer metal sheet Cu, an absorbing layer and an AlN antireflection layer formed through reactive sputtering in sequence, wherein the absorbing layer comprises multiple absorbing period layers; each period layer comprises two layers of effective absorbing layer films; the effective absorbing layer films are metal-layer Ni films and ceramic absorbing-layer TiNxOy-Ni films from top to bottom in sequence; and the metal-layer Ni films are 5-8 nm thick. The invention further discloses a preparation method. The preparation method comprises procedures of pretreatment of the bottom-layer metal sheet, deposition of the absorbing layer and high-vacuum heat annealing; the procedure of deposition of the absorbing layer adopts a three-target direct-current magnetron sputtering method; and the coating deposition is performed with TiO2 having the purity of 99.9 wt%, metal Ni having the purity of 99.99 wt% and metal Al having the purity of 99.99 wt% as sputtering targets. The solar absorbing layer adopts design thoughts of multistage layered structure and component gradient, so that the absorbing layer has both characteristics of multistage layered structure and component gradient; the absorption/emission rate is optimized; and the solar absorbing film also has the characteristics of corrosion resistance and oxidation resistance, the coating working reliability is guaranteed, and the comprehensive performance of a blue titanium selective absorption coating layer is further enhanced.

Description

technical field [0001] The invention relates to a solar absorbing film, and also relates to a preparation method of the solar absorbing film, which belongs to the technical field of film coating. Background technique [0002] Solar energy is an ideal renewable energy, which has the advantages of cleanness, no pollution, and inexhaustibility. The key part of the solar thermal conversion utilization device is the solar collector, and the core component of the solar collector is the solar spectrum selective coating. This coating absorbs most of the energy in the ultraviolet to near-infrared range of the solar spectrum, strongly reflects the infrared band, and has a very low infrared radiation rate. In order to make full use of solar energy, people have designed a selectively absorbing solar coating material, which must meet the following two conditions: 1) The degree of light absorption in the solar spectrum is high, that is, the absorption rate α is as high as possible; 2) )...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48B32B15/04B32B18/00C23C14/04C23C14/14C23C14/06
CPCY02E10/40
Inventor 黄林冲操振华魏明真徐丽君石俊孟祥康
Owner JIANGSU AOLAN ARCHITECTURE GLASS
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