Thermal sprayed coating anti-reflection protective layer applicable to selective absorption of medium and high-temperature solar energy and preparation method of thermal sprayed coating anti-reflection protective layer
A technology of thermal spraying and protective layer, applied in the direction of coating, metal material coating process, superimposed layer plating, etc., can solve problems such as the decline of the absorption performance of the coating, improve the surface state, increase the absorption rate, reduce the infrared The effect of emissivity
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[0026] Example 1
[0027] An anti-reflection protective layer suitable for solar selective absorption of Co-WC thermal spray coatings is prepared by the following method:
[0028] (1) 40wt% Co 3 O 4 -CoAl 2 O 4 Preparation of sol: Weigh 6.909g Co(NO 3 ) 2 ·6H 2 O, 3.918gC 9 H 21 AlO 3 , Measure 139ml of absolute ethanol, and weigh the Co(NO 3 ) 2 ·6H 2 O was added to absolute ethanol to prepare 0.138mol / L A solution; 172ml deionized water was measured, and the C 9 H 21 AlO 3 Add deionized water, stir magnetically at 80°C until it is completely dissolved, and prepare solution B of the same concentration; slowly add solution A to suspension B to obtain solution C, adjust the temperature of the water bath to 85°C, and stir for 1 hour at an open constant temperature. The alcohol evaporates to accelerate the rate of hydrolysis, and then add water to the original position; then the temperature is raised to 90°C, and concentrated nitric acid diluted 3 times is added dropwise during the sti...
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[0034] Example 2
[0035] An anti-reflection protective layer suitable for solar selective absorption of Co-WC thermal spray coating, prepared by the following method:
[0036] (1) Preparation of 40wt% Co by sol-gel method 3 O 4 -CoAl 2 O 4 Sol: Weigh 6.909g Co(NO 3 ) 2 ·6H 2 O, 3.918gC 9 H 21 AlO 3 Measure out 139ml of absolute ethanol, weigh out Co(NO 3 ) 2 ·6H 2 O was added to absolute ethanol to prepare 0.138mol / L A solution; 172ml deionized water was measured, and the C 9 H 21 AlO 3 Add deionized water, stir magnetically at 80°C until it is completely dissolved to prepare solution B of the same concentration; slowly add solution A to suspension B to obtain solution C, adjust the temperature of the water bath to 85°C, and stir for 1h at an open constant temperature to make The alcohol evaporates to accelerate the rate of hydrolysis, and then replenish water to the original position; then the temperature is raised to 90°C, and concentrated nitric acid diluted 3 times is added dro...
Example Embodiment
[0042] Example 3
[0043] An anti-reflection protective layer suitable for solar selective absorption of Co-WC thermal spray coating, prepared by the following method:
[0044] (1) Preparation of 40wt% Co by sol-gel method 3 O 4 -CoAl 2 O 4 Sol: Weigh 6.909g Co(NO 3 ) 2 ·6H 2 O, 3.918gC 9 H 21 AlO 3 Measure out 139ml of absolute ethanol, weigh out Co(NO 3 ) 2 ·6H 2 O was added to absolute ethanol to prepare 0.138mol / L A solution; 172ml deionized water was measured, and the C 9 H 21 AlO 3 Add deionized water, stir magnetically at 80°C until it is completely dissolved to prepare solution B of the same concentration; slowly add solution A to suspension B to obtain solution C, adjust the temperature of the water bath to 85°C, and stir for 1h at an open constant temperature to make The alcohol evaporates to accelerate the rate of hydrolysis, and then replenish water to the original position; then the temperature is raised to 90°C, and concentrated nitric acid diluted 3 times is added dro...
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