Preparation method for functional power of solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide

A technology of solar energy absorption and functional powder, which is applied in the field of solar thermal utilization, can solve the problems of inability to heat resistance and low emissivity, and achieve the effects of good solar selective absorption performance and good fluidity

Inactive Publication Date: 2013-04-17
郝勇 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current paint-type coatings cannot solve the problem of heat resistance and take into account the problems of better absorption efficiency and lower emissivity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0016] The present invention is a method for preparing a medium-high temperature solar energy absorbing composite coating based on chromium-aluminum-manganese oxide functional powder. %, manganese chloride tetrahydrate 10%; the binder is 1053 silicone resin, the dispersant is glycerol, and the ratio is mixed raw materials: binder: dispersant=500:10:2;

[0017] Described method comprises the steps:

[0018] Raw material mixing step Mix the mixed raw material, binder, dispersant, and deionized water in a ratio of 500:10:2:1000 and continue stirring for 40-60 minutes to form a uniform slurry;

[0019] Put the slurry into the colloid mill for wet grinding and mixing, fully disperse the components in the slurry, and stir for 1 hour;

[0020] The drying step adopts the spray drying method to prepare the functional powder. The temperature of the air inlet of the spray drying tower is set at 160-170°C, the temperature of the air outlet is set at 40-60°C, the speed of the feeding pump...

Embodiment 1

[0024] Get 500g of mixed raw materials, the mass ratio is 55% of chromium oxide, 35% of aluminum oxide, and 10% of manganese chloride tetrahydrate.

[0025] Take 10g of 1053 silicone resin, 2-3ml of glycerin, 1000ml of deionized water and fully mix and stir for 40 minutes.

[0026] Put the slurry into the colloid mill for wet grinding and mixing, fully disperse the components in the slurry, and stir for 1 hour;

[0027] The drying step adopts the spray drying method to prepare the functional powder. The temperature of the air inlet of the spray drying tower is set to 160°C, the temperature of the air outlet is set to 40°C, the speed of the feeding pump is set to 800r / min, and the speed of the atomizer is set to 17000r / min; Send the slurry into the spray drying tower to prepare the functional powder; the particle size of the powder is not more than 50 μm;

[0028] The step of preparing the permeable membrane to adjust the acid adopts the sol-gel method to prepare the tin oxide...

Embodiment 2

[0031] Get 500g of mixed raw materials, the mass ratio is 55% of chromium oxide, 35% of aluminum oxide, and 10% of manganese chloride tetrahydrate.

[0032] Take 10g of 1053 silicone resin, 2-3ml of glycerol, 1000ml of deionized water and fully mix and stir with the mixed raw materials for 50 minutes.

[0033] Put the slurry into the colloid mill for wet grinding and mixing, fully disperse the components in the slurry, and stir for 1 hour;

[0034] The drying step adopts the spray drying method to prepare the functional powder. The temperature of the air inlet of the spray drying tower is set to 165°C, the temperature of the air outlet is set to 50°C, the speed of the feeding pump is set to 800r / min, and the speed of the atomizer is set to 18500r / min; Send the slurry into the spray drying tower to prepare the functional powder; the particle size of the powder is not more than 50 μm;

[0035] The step of preparing the permeable membrane to adjust the acid adopts the sol-gel me...

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PUM

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Abstract

The invention relates to the technical field of solar energy photo-thermal utilization, in particular to a preparation method for functional power of a solar energy absorbed composite coating layer based on chromium-aluminum-manganese oxide. The composite coating layer comprises the following raw materials of a mixed raw material, a bonder and a dispersing agent, which are mixed at the ratio of 500:10:2, wherein the mixed raw material comprises the following components in percentage by mass: 55 percent of chromium oxide, 35 percent of aluminum oxide and 10 percent of manganese chloride tetrahydrate; and the bonder is 1053 silicone resin; and the dispersing agent is glycerine. According to the invention, the functional power prepared by using a spray drying method has excellent flowability and can meet the requirements of plasma spraying on material delivery. A phase structure of the coating layer is stable in selective absorption, can be fixedly combined with a matrix, and has excellent thermal shock resistance both in property and structure.

Description

technical field [0001] The invention relates to the technical field of solar photothermal utilization, in particular to a method for preparing a high-temperature solar absorbing coating based on chromium-aluminum-manganese oxide functional powder. Background technique [0002] At present, under the background of increasingly scarce non-renewable energy sources such as fossils, the world's energy structure will undergo major changes, and solar energy will gradually replace conventional energy sources and become an indispensable and important energy source. Research on solar thermal utilization of solar energy has become a hot topic today. The high-temperature solar thermal utilization in solar concentrating thermal power generation is the development trend of solar energy utilization in the future. Among them, the coating-type solar absorbing coating is relatively economical, and the main technical solution to solve the problem is to develop high-performance medium-high temper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/00C09D5/32C09D7/12
Inventor 郝勇张聪林郝婷婷
Owner 郝勇
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