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High-selectivity moderate-high temperature solar selective absorption coating Ni-Mo composite powder and preparation method thereof

A composite powder, high-selectivity technology, used in coatings, metal material coating processes, metal processing equipment, etc., can solve problems such as poor thermal shock resistance and low bonding strength between magnetron sputtering coatings and substrates , to achieve the effect of low production cost, improved selective absorption effect and high efficiency

Inactive Publication Date: 2016-09-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the demand for solar heat utilization and the continuous development of technology, the application range of solar collector tubes has developed from low-temperature applications to medium-temperature and high-temperature fields. However, the bonding strength between the magnetron sputtering coating and the substrate is low, and the thermal shock resistance is poor. Its application in the field of high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A Ni-Mo composite powder of a high-selectivity medium-high temperature solar selective absorption coating, wherein the mass ratio of Mo element to Ni element is 2:8, and the preparation method is as follows:

[0022] (1) Prepare 50g of Ni-Mo core-shell structure composite powder by electroless plating, including 40g of Mo element and 10g of Ni coating amount: Take 40g of molybdenum powder with an original particle size of 200 mesh and add it to 100ml HCl (30ml / L) solution, 100ml SnCl 2 (30g / L)+HCl (30ml / L) mixed solution, 100ml PdCl 2 Carry out pretreatment in the mixed solution of (0.5g / L)+HCl (30ml / L), wherein pretreatment process is to finish under magnetic stirring, after pretreatment finishes, Mo powder is dried in 80 ℃ of vacuum ovens; Weigh 43g Ni(CH 3 OO) 2 , 88g of sodium citrate, added to 1.5L of deionized water under magnetic stirring to prepare the main salt solution; the configuration concentration is 5-10g / L glacial acetic acid, and slowly added to the ...

Embodiment 2

[0027] A Ni-Mo composite powder of a high-selectivity medium-high temperature solar selective absorption coating, wherein the mass ratio of Mo element to Ni element is 2:8, and the preparation method is as follows:

[0028] (1) Prepare 60g of Ni-Mo core-shell structure composite powder by electroless plating, including 40g of Mo element and 20g of Ni coating amount: Take 40g of molybdenum powder with an original particle size of about 200μm and add it to 100ml HCl (30ml / L ) solution, 100ml SnCl 2 (30g / L)+HCl (30ml / L) mixed solution, 100ml PdCl 2 Carry out pretreatment in the mixed solution of (0.5g / L)+HCl (30ml / L), wherein pretreatment process is to finish under magnetic stirring, after pretreatment finishes, Mo powder is dried in 80 ℃ of vacuum ovens; Weigh 87g Ni(CH 3 OO) 2 , 176g of sodium citrate, added to 3L of deionized water under magnetic stirring to prepare the main salt solution; the configuration concentration was 5-10g / L glacial acetic acid, and slowly added to ...

Embodiment 3

[0033] A Ni-Mo composite powder of a high-selectivity medium-high temperature solar selective absorption coating, wherein the mass ratio of Mo element to Ni element is 2:8, and the preparation method is as follows:

[0034] (3) Prepare 70g of Ni-Mo core-shell structure composite powder by electroless plating, including 40g of Mo element and 30g of Ni coating amount: Take 40g of molybdenum powder with an original particle size of about 200μm and add it to 100ml HCl (30ml / L ) solution, 100ml SnCl 2 (30g / L)+HCl (30ml / L) mixed solution, 100ml PdCl 2 Carry out pretreatment in the mixed solution of (0.5g / L)+HCl (30ml / L), wherein pretreatment process is to finish under magnetic stirring, after pretreatment finishes, Mo powder is dried in 80 ℃ of vacuum ovens; Weigh 127g Ni(CH 3 OO) 2 , 153g of sodium citrate, added to 4L deionized water under magnetic stirring to prepare the main salt solution; the configuration concentration is 5-10g / L glacial acetic acid, and slowly added to the...

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Abstract

The invention belongs to the field of functional coating preparation through thermal spraying and particularly relates to high-selectivity moderate-high temperature solar selective absorption coating Ni-Mo composite powder and a preparation method thereof. The Ni-Mo composite powder is formed by recombination of Ni powder and Ni-Mo shell-core composite powder. The mass ratio of Ni and Mo in the Ni-Mo composite powder is 7:3-8:2. The Ni-Mo shell-core composite powder is formed by recombination of Ni powder and Mo powder, and the Mo powder is partially wrapped by the Ni powder to form a shell-core structure. According to the high-selectivity moderate-high temperature solar selective absorption coating Ni-Mo composite powder and the preparation method thereof, Mo which is prone to oxidization is partially wrapped by Ni which is not prone to oxidization through a chemical plating method, so that the bare surface area, directly exposed in the oxidation environment, of Mo in the Ni-Mo composite powder and the oxidization content of Mo in the using process of the Ni-Mo composite powder are controlled. By applying the Ni-Mo composite powder to coating preparation, the selective absorption effect of the solar selective absorption coating can be effectively improved.

Description

technical field [0001] The invention belongs to the field of preparing functional coatings by thermal spraying, and in particular relates to a Ni-Mo composite powder of a high-selectivity medium-high temperature solar selective absorption coating and a preparation method thereof. Background technique [0002] Solar energy is an inexhaustible clean energy, and there are three ways to use sunlight energy: photothermal conversion, photoelectric conversion and photochemical conversion. Solar power generation is a very important way to utilize solar energy resources through photothermal conversion, in which highly selective solar selective absorbing coatings are very critical components in solar power generation systems. [0003] At present, the methods for preparing solar selective absorbing coatings at home and abroad mainly include magnetron sputtering, multi-arc ion plating, sol-gel method, paint coating, thermal spraying and so on. The coating prepared by the magnetron sput...

Claims

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Application Information

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IPC IPC(8): C22C19/03B22F1/02C23C4/08C23C18/32
CPCC22C19/03C23C4/08C23C18/32B22F1/17
Inventor 程旭东段小华郭威阳
Owner WUHAN UNIV OF TECH
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