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SiO2-Ag-SiO2 composite membrane for solar thermal power generation reflector and preparation method thereof

A technology of solar thermal power generation and reflectors, which is applied in sputtering coating, vacuum evaporation coating, ion implantation coating, etc., can solve problems affecting reflectivity, affecting performance, and easy to be corroded, and achieves a simple process route , save maintenance costs and reduce environmental pollution

Active Publication Date: 2017-02-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since silver has a high reflectivity in the infrared region, it has great potential as a material for high-performance mirror coatings. However, there is a big problem to be considered when silver films are used as reflective materials, namely Durability cannot be guaranteed, because the mechanical strength and chemical stability of the silver film are not good, it is easy to be oxidized or vulcanized, and loses luster, which will lead to a decrease in reflectivity, so it is necessary to coat a protective film on the silver film Less
In addition, because the adhesion of Ag to the glass substrate is relatively poor, and it is easy to be corroded and peeled off in some special atmospheres, which affects its performance. Therefore, in practical applications, it is necessary to plate a layer between the two. Dielectric layer to improve the adhesion of the reflective layer to the substrate
However, if the thickness of the protective film cannot be effectively controlled, it will also affect the improvement of reflectivity.

Method used

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  • SiO2-Ag-SiO2 composite membrane for solar thermal power generation reflector and preparation method thereof
  • SiO2-Ag-SiO2 composite membrane for solar thermal power generation reflector and preparation method thereof
  • SiO2-Ag-SiO2 composite membrane for solar thermal power generation reflector and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of SiO used for solar thermal power mirror 2 -Ag-SiO 2 The preparation method of composite film comprises the following steps:

[0028]1) Select an ordinary glass slide (as the substrate), wash it with detergent several times (such as 2-5 times), wash off the impurities (dirty) on the surface, then rinse it with tap water, and then put it into deionized water for ultrasonic cleaning 20min, and finally put it into absolute ethanol [99.99% (mass), analytically pure] and ultrasonically clean it for 20min to obtain glass substrate 1; store the cleaned glass substrate in absolute ethanol [99.99% (mass), analytically pure] spare;

[0029] 2) Prepare a transition layer (or dielectric layer) on a glass substrate (or glass substrate): the method is to use radio frequency magnetron sputtering deposition method, SiO 2 The target size is The purity is 99.999wt%, the sputtering gas is high-purity argon with a volume fraction of 99.999%, and the vacuum degree of the sputt...

Embodiment 2

[0037] A kind of SiO used for solar thermal power mirror 2 -Ag-SiO 2 The preparation method of composite film comprises the following steps:

[0038] 1) Select an ordinary glass slide (as the substrate), wash it with detergent several times (such as 2-5 times), wash off the impurities (dirty) on the surface, then rinse it with tap water, and then put it into deionized water for ultrasonic cleaning After 20 minutes, put it into absolute ethanol [99.99% (mass), analytically pure] and ultrasonically clean it for 20 minutes to obtain a glass substrate; store the cleaned glass substrate in absolute ethanol [99.99% (mass), analytically pure] for later use ;

[0039] 2) Prepare a transition layer (or dielectric layer) on a glass substrate (or glass substrate): the method is to use radio frequency magnetron sputtering deposition method, SiO 2 The target size is The purity is 99.999wt%, the sputtering gas is high-purity argon with a volume fraction of 99.999%, and the vacuum degre...

Embodiment 3

[0045] A kind of SiO used for solar thermal power mirror 2 -Ag-SiO 2 The preparation method of composite film comprises the following steps:

[0046] 1) Select an ordinary glass slide (as the substrate), wash it with detergent several times (such as 2-5 times), wash off the impurities (dirty) on the surface, then rinse it with tap water, and then put it into deionized water for ultrasonic cleaning After 20 minutes, put it into absolute ethanol [99.99% (mass), analytically pure] and ultrasonically clean it for 20 minutes to obtain a glass substrate; store the cleaned glass substrate in absolute ethanol [99.99% (mass), analytically pure] for later use ;

[0047] 2) Prepare a transition layer (or dielectric layer) on a glass substrate (or glass substrate): the method is to use radio frequency magnetron sputtering deposition method, SiO 2 The target size is The purity is 99.999wt%, the sputtering gas is high-purity argon with a volume fraction of 99.999%, and the vacuum degre...

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Abstract

The invention relates to the technical field of producing and manufacturing of materials for solar thermal power generation reflectors, in particular to a SiO2-Ag-SiO2 composite membrane for a solar thermal power generation reflector. The SiO2-Ag-SiO2 composite membrane is characterized by comprising a glass substrate and a membrane layer formed on the glass substrate; the membrane layer is composed of a transition layer, a reflecting layer and a protecting layer, and the transition layer, the reflecting layer and the protecting layer are sequentially arranged from the surface of the glass substrate to the outside and all obtained through a radio-frequency magnetron sputtering method; and the transition layer is made from SiO2 and is 20-50 nm thick, the reflecting layer is made from Ag and is 100-200 nm thick, and the protecting layer is made of SiO2 and is 50-150 nm thick. The composite membrane obtained through the method has the characteristics of being high in reflection rate, good in adhesion and long in outdoor service life.

Description

technical field [0001] The invention relates to the technical field of manufacturing materials for solar thermal power generation reflectors, in particular to a SiO2 material for solar thermal power generation reflectors 2 -Ag-SiO 2 Composite membrane and method for its preparation. Background technique [0002] With the shortage of energy and the aggravation of environmental problems worldwide, the research, development and utilization of renewable energy, mainly solar energy, have been paid more and more attention. Solar power generation is mainly divided into photovoltaic power generation and photothermal power generation. Photovoltaic power generation has developed rapidly in the past few decades. In recent years, solar thermal power generation has attracted attention due to its many advantages such as good efficiency, clean and pollution-free, stable operation, and easy integration into the power grid. Experts predict that in the near future, the capacity of phototh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/10C23C14/18C23C14/35C03C17/36
CPCC03C17/36C03C17/3618C03C17/3642C03C17/3644C23C14/10C23C14/185C23C14/35
Inventor 李宏贺慧婷
Owner WUHAN UNIV OF TECH
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