Nano black chrome highly selective endothermic film formula and preparation method thereof

Abstract

The invention discloses a nano black chrome highly selective endothermic film formula and a preparation method thereof. The raw materials consist of a base material, nano dichromium trioxide powder and ethanol; the base material includes manganese acetate, ferric chloride, nickel chloride and cupric chloride; and the mass ratio of the components which are the manganese acetate, the ferric chloride, the nickel chloride and the cupric chloride in the base material is 3-5:1-3:2-4:1. The nano material uniformly is deposited on the surface of the metal base material; and through actual measurement,solar absorptivity is greater than 93%, and infrared emissivity is less than 10%; the obtained film has excellent product stability, weatherability and optical performance; and the preparation technology is simple and feasible, and the formula and the preparation method have stronger market prospects and economic benefits prospects.

Description

technical field [0001] The invention relates to the technical field of heat-absorbing materials, in particular to a nano black chromium high-selectivity heat-absorbing film layer formula and a preparation method thereof. Background technique [0002] With the domestic energy and environmental protection issues, solar energy has been paid more and more attention as an inexhaustible clean energy. In the field of solar energy utilization technology, solar flat panel collectors are more and more favored by the building integration market and consumers. The preparation technology of heat-absorbing film is the core technology of flat-panel solar energy, which is related to the core and quality of the product, from simple black paint in the early stage to metal oxide coating with organic adhesives such as rubber and resin, to electroplating, anode The oxidized black chromium and the blue titanium film of the physical vapor phase method have gone through a long process. The perfor...

AI Technical Summary

Problems solved by technology

However, the heat-absorbing film technology of flat-plate collectors in my country has not been effectively improved and optimized. The coatings used in domestic flat-plate solar collectors mainly include paint coatings, anodic oxidation coatings, black chrome coatings and magnetic coatings. Controlled Sputtering Coating

At present, the paint coatings on the market have high emissivity, poor selectivity, poor thermal performance, and short service life; the manufacturing equipment of magnetron sputtering coatings is expensive, and the weather resistance is not very ideal, that is, performance will decay over time Even the coating peels off

The preparation process of black chromium coating is more polluting and cannot meet the needs of environmental protection