Coating capable of absorbing medium and high temperature solar energy selectively and preparation method thereof

A technology for absorbing coating and solar energy, applied in the direction of solar thermal power generation, radiation absorbing coatings, coatings, etc., can solve the problems of low process deposition efficiency, long production cycle, complicated process, etc. simple craftsmanship

Inactive Publication Date: 2011-06-15
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned coatings have been applied on the surface of focused heat collectors at a temperature of 100-350°C, but processes such as multi-arc ion plating, radio frequency sputtering, or magnetron multi-target reactive co-sputtering have low deposition efficiency, long production cycle, and poor process efficiency. complex and costly

Method used

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  • Coating capable of absorbing medium and high temperature solar energy selectively and preparation method thereof
  • Coating capable of absorbing medium and high temperature solar energy selectively and preparation method thereof
  • Coating capable of absorbing medium and high temperature solar energy selectively and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: Medium and high temperature solar selective absorption coating

[0036] The coating has a structure of double-layer metal-ceramic layers, such as figure 1 and figure 2 Shown: including the first layer of cermet layer 2 and the second layer of cermet layer 3; using the liquid feeding plasma spraying process, the first group of slurry is sprayed on the surface of the substrate 1 to form the first layer of cermet layer 2 , and then spray the second group of slurry on the surface of the first cermet layer 2 to form the second cermet layer 3 .

[0037] The slurry is prepared by doping metal components into an oxide or nitride ceramic medium and adding deionized water.

[0038] The metal component adopts Mo, W, Ni, Cr or Co fine powder, and its particle size is 40-100 μm.

[0039] The ceramic medium adopts Al 2 o 3 Or AlN powder, the particle size is 40 ~ 100μm.

[0040] The substrate 1 refers to a stainless steel substrate with a grade of 321, or other meta...

Embodiment 2

[0045] Example 2: Preparation of Medium and High Temperature Solar Selective Absorbing Coating

[0046] First prepare the precursor solution doped with metal particles, mix the metal particles into ceramic media such as oxides or nitrides, add deionized water to make a slurry, and then use the liquid feed to spray the slurry on the metal substrate. Prepared as a coating.

[0047] details as follows:

[0048] 1. Configure two sets of precursor slurry:

[0049] (1) Weigh 0.8mol of metal powder Mo, then weigh 0.8mol of ceramic powder Al 2 o 3 Take 10 grams of polyvinyl alcohol, add it to the powder raw material and mix evenly, then add deionized water with a volume of 1L to prepare the first group of slurry.

[0050] (2) Weigh 0.2mol of metal powder Mo, then weigh 0.8mol of ceramic powder Al 2 o 3 Take 10 grams of polyvinyl alcohol, add it to the powder raw material and mix evenly, then add deionized water with a volume of 1L to prepare the second group of slurry.

[0051]...

Embodiment 3

[0057] Example 3: Preparation of Medium and High Temperature Solar Selective Absorbing Coating

[0058] In addition to steps 1 and 2, the metal component of the two groups of precursor slurries configured is W, and the ceramic medium selected is Al 2 o 3 , other preparation methods and performance testing methods are the same as in Example 2.

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Abstract

The invention relates to a coating capable of absorbing medium and high temperature solar energy selectively and a preparation method thereof. The coating is composed of a double-decked metal ceramic layer, and is prepared by the following steps: a liquid charging plasma spraying technology is utilized, firstly spraying a first group of slurry on the surface of a substrate and a first group of metal ceramic layer is formed; then spraying a second group of slurry on the surface of the first metal ceramic layer and a second layer of metal ceramic layer is formed, wherein the slurry is prepared by doping metal elements into oxidies dielectric or nitrides dielectric and adding deionized water. The preparation method of the coating comprises the steps such as presoma slurry configuration and liquid charging plasma spraying and the like. The coating capable of absorbing medium and high temperature solar energy selectively provided by the invention has the advantages of uniform coating structure, stable high-temperature performance, long service life, simple preparation technology, low cost and the like.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a high-temperature solar selective absorption coating in liquid feeding plasma spraying and a preparation method thereof. Background technique [0002] Due to the depletion of limited fossil fuels on the earth, and it will take a long time for nuclear energy to reach commercialization as an energy source, solar energy will become a major member of the energy family during the transitional period from fossil fuels to nuclear energy. [0003] Solar energy is a clean and pollution-free energy source: in solar thermal utilization devices, the components used to absorb solar radiation are the key, and the thermal radiation performance of the absorbing surface of the components plays an important role in the performance of the collector. Since both the sun's radiation and the coating's radiation are electromagnetic waves, they all have a certain wavelength range. Solar radiation can be regarde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/48C09D1/00C09D5/32B32B33/00
CPCY02E10/40F24S70/225
Inventor 程旭东闵捷宫殿清李光磊黄伟万倩王珂马涛龚正陈文张朴陆伟孟晓明
Owner WUHAN UNIV OF TECH
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