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Subabsorbent layer in the form of a graded composite coating and method for making the same

A technology of composite coating and absorbing layer, which is applied in the direction of coating, metal material coating technology, layered products, etc., can solve the problems of unfavorable solar heat absorption efficiency and narrow range, and achieve strong practicability, improve performance, The effect of performance improvement

Active Publication Date: 2017-04-05
福建新越金属材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a sub-absorbing layer in the form of a gradient composite coating and a method for making the same. Defects in solar heat absorption efficiency

Method used

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  • Subabsorbent layer in the form of a graded composite coating and method for making the same
  • Subabsorbent layer in the form of a graded composite coating and method for making the same
  • Subabsorbent layer in the form of a graded composite coating and method for making the same

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preparation example Construction

[0033] A method for preparing the above-mentioned selective solar heat absorption coating includes the following steps:

[0034] Step 1. Using electron beam evaporation or AC magnetron sputtering process, aluminum strip, stainless steel strip or copper strip is used as the metal strip substrate 5, and a layer of high infrared emissivity is plated on the metal strip substrate 5. Reflective base layer 4.

[0035] Step 2. Use electron beam evaporation or AC magnetron sputtering process to plate one or more coatings on the highly reflective base layer 4 obtained in step 1 to establish the main absorptive coating of the selective solar heat absorption coating film. Layer 3, the main absorptive coating 3 on the one hand according to the mass ratio of the first metal Me1 and the second metal Me to match the target materials, placed in the same vacuum coating chamber, and then through the magnetron co-sputtering process Perform layer-by-layer coating in the above-mentioned vacuum coating ...

Embodiment 1

[0040] An anti-reflection layer based on TCO material, comprising a TCO transparent conductive oxide coating 2 as a secondary anti-reflection layer and a SiO2 (SiOx) oxide coating 1 as a primary anti-reflection layer. The SiO2 (SiOx) The oxide coating 1 covers the TCO transparent conductive oxide coating 2. The TCO transparent conductive oxide coating 2 is prepared by a DC magnetron sputtering process using a composite TCO target. The SiO2 (SiOx) coating is prepared by using electron beam evaporation or AC magnetron sputtering process. The composite TCO target material is a metal oxide or a mixture of metal oxides. The composite TCO target is ZnO:Al2O3 (AZO).

[0041] In this embodiment, AZO, a semiconductor coating material with a higher refractive index, can replace the secondary anti-reflection layer material in the middle sub-layer structure of the traditional selective solar heat absorption coating film system. Compared with the secondary anti-reflection layer material (u...

Embodiment 2

[0044] An anti-reflection layer based on TCO material, comprising a TCO transparent conductive oxide coating 2 as a secondary anti-reflection layer and a SiO2 (SiOx) oxide coating 1 as a primary anti-reflection layer. The SiO2 (SiOx) The oxide coating 1 covers the TCO transparent conductive oxide coating 2. The TCO transparent conductive oxide coating 2 is prepared by a DC magnetron sputtering process using a composite TCO target. The SiO2 (SiOx) coating is prepared by using electron beam evaporation or AC magnetron sputtering process. The composite TCO target material is a metal oxide or a mixture of metal oxides. The composite TCO target is ZnO:Ga2O3 (GZO).

[0045] In this embodiment, the semiconductor coating material using GZO has a higher refractive index and can replace the secondary anti-reflection layer material in the middle sub-layer structure of the traditional selective solar heat absorption coating film system. Compared with the secondary anti-reflection layer ma...

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Abstract

The invention provides a sub-absorbing layer with a gradually-changed composite coating form. The sub-absorbing layer sequentially comprises a bottom composite coating, at least one gradually-changed composite coating and a top composite coating from bottom to top, wherein the chemical composition of the bottom composite coating is a first metal Me1; the chemical composition of the top composite coating is a second metal Me2; the chemical composition of the gradually-changed composite coating comprises the first metal Me1 and the second metal Me2. The invention further comprises a preparation method of the sub-absorbing layer. By virtue of the coating structure prepared by the preparation method, the structural design of a selective solar heat absorbing coating is relatively flexible and changeable; in addition, by virtue of the gradually-changed structure, the wavelength range of selection objects of the selective solar heat absorbing coating and the incident solar irradiance range are enlarged, and thus the performance of the selective solar heat absorbing coating is improved.

Description

Technical field [0001] The invention relates to a selective solar heat absorption coating for flat solar heat collectors, in particular to a sub-absorption layer with a graded composite coating form and a preparation method thereof. Background technique [0002] For the application of flat panel solar collectors, one of the most common and common preparation techniques is to prepare selective solar heat absorption coatings on metal sheets. At present, most of the selective solar heat absorption coatings are made by vacuum coating technology. [0003] The selective solar heat absorption coating is prepared by a vacuum coating method. This method includes a multilayer thin film structure to form a selective solar heat absorption coating film system. Normally, the selective solar heat absorption coating includes a highly reflective base layer, which has a low infrared emissivity. One or more intermediate sub-layers are stacked on the infrared high-reflective substrate layer, and thi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24J2/48B32B15/00B32B15/04B32B9/04C23C14/08C23C14/14C23C14/30C23C14/35
CPCY02E10/40
Inventor 马丁瑞纳眭凌杰
Owner 福建新越金属材料科技有限公司
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