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mo/si/sio 2 Preparation method of solar selective absorbing coating

An absorption coating and selective technology, applied in the field of solar energy utilization, can solve the problems of expensive coating production equipment, attenuation of absorption performance, attenuation of coating performance, etc., to improve absorption and conversion efficiency, improve high temperature stability, increase light the effect of absorption

Active Publication Date: 2019-08-02
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the current research status of solar selective absorbing coatings at home and abroad, solar selective absorbing coatings are currently facing the following problems: the production equipment of coatings is expensive, the cost of raw materials is high; the coating structure is complex and the coating preparation process is not perfect; Some raw materials and certain processes have certain pollution to the environment; the coating performance has a relatively large attenuation under special working conditions
For cermet-based coatings, the attenuation of absorption performance caused by the oxidation of metal components in the cermet layer

Method used

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  • mo/si/sio <sub>2</sub> Preparation method of solar selective absorbing coating
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  • mo/si/sio <sub>2</sub> Preparation method of solar selective absorbing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) The surface of the Cu substrate is polished and degreased with acetone, cleaned with deionized water and dried in an oven for later use; before spraying, the surface of the substrate is sandblasted to achieve uniform roughness of the substrate surface Purpose.

[0043] (2) Prepare spherical agglomerate powder by spray granulation process: Take 10kg of composite powder as an example, Mo usage is 5kg, Si usage is 1kg, SiO 2 The dosage is 4kg; mix all raw materials and use water as a dispersant to make a stable liquid slurry; send the slurry to the prilling tower, and set the liquid material feeding rate to 500g·min -1 , the rotation speed of the atomizing disc is set to 10000r·min -1 , the air inlet temperature is set to 150°C, and the air outlet is set to 60°C. After the granulation is completed, the agglomerated powder of 60-80μm is screened for use;

[0044] (3) Take the above powder and use APS-3000 plasma spraying equipment to prepare a layer of 20-30μm Mo / Si / S...

Embodiment 2

[0051] (1) The surface of the Cu substrate is polished and degreased with acetone, cleaned with deionized water and dried in an oven for later use; before spraying, the surface of the substrate is sandblasted to achieve uniform roughness of the substrate surface Purpose.

[0052] (2) Prepare spherical agglomerate powder by spray granulation process: Take 10kg of composite powder as an example, Mo usage is 4kg, Si usage is 1kg, SiO 2 The dosage is 5kg; mix all raw materials and use water as a dispersant to make a stable liquid slurry; send the slurry to the prilling tower, and set the feeding rate of the liquid material to 500g·min -1 , the rotation speed of the atomizing disc is set to 10000r·min -1 , the air inlet temperature is set to 150°C, and the air outlet is set to 60°C. After the granulation is completed, the agglomerated powder of 60-80μm is screened for use;

[0053](3) Take the above powder and use APS-3000 plasma spraying equipment to prepare a layer of 20-30μm M...

Embodiment 3

[0059] (1) The surface of the Cu substrate is polished and degreased with acetone, cleaned with deionized water and dried in an oven for later use; before spraying, the surface of the substrate is sandblasted to achieve uniform roughness of the substrate surface Purpose.

[0060] (2) Prepare spherical agglomerate powder by spray granulation process: Take 10kg of composite powder as an example, the amount of Mo used is 3kg, the amount of Si used is 1kg, SiO 2 The usage amount is 6kg; mix all the raw materials and use water as the dispersant to make a stable liquid slurry; send the slurry to the prilling tower, and set the feeding rate of the liquid material to 500g·min -1 , the rotation speed of the atomizing disc is set to 10000r·min -1 , the air inlet temperature is set to 150°C, and the air outlet is set to 60°C. After the granulation is completed, the agglomerated powder of 60-80μm is screened for use;

[0061] (3) Take the above powder and use APS-3000 plasma spraying eq...

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Abstract

The invention discloses a preparation method of a Mo / Si / SiO2 solar selective absorbing coating. The coating treats a Cu plate as a base material; firstly a Mo / Si / SiO2 metal ceramic layer is prepared on the surface of a base body by using a plasma spraying technology; then an HF solution with the mass fraction being 20% serves as a corrosive agent, so that a large amount of even micro-nano-level holes are formed in the surface of the Mo / Si / SiO2 metal ceramic layer; a supersonic spraying technology is utilized to deposit Mo on the surface of the Mo / Si / SiO2 metal ceramic layer, and thus Mo is permeated into the micro-nano-level holes of the Mo / Si / SiO2 metal ceramic layer; and finally the surface of the Mo / Si / SiO2 metal ceramic layer is coated with an Al2O3 anti-reflection layer to increase absorption of visible light and decrease infrared radiation. The Mo / Si / SiO2 solar selective absorbing coating material is simple in structure, has the advantages of being low in production cost, convenient in construction and the like, the high temperature stability of the coating is provided, and development of utilization of solar clean energy is facilitated.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization, in particular to a Mo / Si / SiO 2 Process for the preparation of solar selective absorbing coatings. Background technique [0002] Solar selective absorption coatings are applied in the low temperature range, and their related technologies are relatively mature, and are used in flat-plate and vacuum tube solar water heaters; thermal power generation. Solar thermal power generation is one of the core technologies of solar energy conversion and has broad market development prospects; solar selective absorption coating is a key material to improve the working efficiency of solar thermal power collectors. The application of medium and high temperature solar selective absorbing coatings can greatly promote the application of solar thermal technology in different industrial fields. [0003] With the in-depth application of high-temperature solar selective absorbing coatings in high-tem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/067C23C24/02C23C18/12C23C28/00
CPCC23C4/067C23C4/134C23C18/1216C23C18/1254C23C24/02C23C28/322C23C28/324C23C28/345
Inventor 闵捷程旭东张运华熊剑袁颂东
Owner HUBEI UNIV OF TECH
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