Preparation method of nano black chromium high-selectivity heat absorption film layer

[0030] A method for preparing a nano-black chromium highly selective heat-absorbing film layer, the specific scheme of which is as follows:

[0031] Add 0.05kg of nano-carbon material, 8kg of isopropanol solution and 0.01kg of surfactant into the mixing kettle, stir and disperse quickly for 30 minutes, and then add 0.3kg of ferric oxide nanopowder, 0.1kg of zinc oxide and 0.1kg of Copper oxide, continue to stir and disperse for 60 minutes, then add 0.3kg of organically modified nano-chromium trioxide powder and 0.04kg of film-forming aids, stir evenly, add to the ball mill disperser, control the speed of 300r / min, and ball mill to disperse for 10h. Then use a high-pressure micro-jet dispersing machine to circulate and disperse 3 times, and the dispersing pressure is 500MPa. After the completion, the film slurry is coated on the substrate, and now it is dried at 60°C and then sintered to obtain the above-mentioned nano black chromium. Selective heat absorbing film layer.

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[0041] A method for preparing a nano-black chromium highly selective heat-absorbing film layer, the specific scheme of which is as follows:

[0042] Add 0.10kg of nano-carbon material, 10kg of isopropanol solution and 0.03kg of surfactant into the mixing kettle, stir and disperse rapidly for 45 minutes, then add 0.5kg of ferric oxide nanopowder, 0.2kg of zinc oxide and 0.3kg of Copper oxide, continue to stir and disperse for 90min, then add 0.6kg of organically modified nano-chromium trioxide powder and 0.06kg of film-forming aid, stir evenly and add it to the ball mill disperser, control the speed at 350r / min, and ball mill to disperse for 14h. Then use a high-pressure micro-jet dispersing machine to circulate and disperse for 4 times, and the dispersing pressure is 550MPa. After the completion, the film slurry is coated on the substrate, and now it is dried at 70°C and then sintered to obtain the above-mentioned nano black chromium. Selective heat absorbing film layer.

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[0055] A method for preparing a nano-black chromium highly selective heat-absorbing film layer, the specific scheme of which is as follows:

[0056] Add 0.16kg of nano-carbon material, 12kg of isopropanol solution and 0.05kg of surfactant into the mixing kettle, stir and disperse quickly for 60 minutes, and then add 0.6kg of ferric oxide nanopowder, 0.4kg of zinc oxide and 0.8kg of Copper oxide, continue to stir and disperse for 120min, then add 1.2kg of organically modified nano-chromium trioxide powder and 0.08kg of film-forming aid, stir evenly and add to the ball mill disperser, control the speed of 400r / min, ball mill disperse for 18h, Then use a high-pressure micro-jet dispersing machine to circulate and disperse for 6 times, and the dispersing pressure is 650MPa. After the completion, the film slurry is coated on the substrate, and now it is dried at 80°C and then sintered to obtain the above-mentioned nano black chromium. Selective heat absorbing film layer.

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