Solar ceramic coating and manufacturing method thereof

Abstract

The invention provides a solar ceramic coating which is prepared by adding water to base stock and an additive. A manufacturing method of the solar ceramic coating comprises the steps as follows: material weighing; material mixing and grinding; sieving, spraying and drying; pressing, firing and grinding; and electrostatic sand planting. According to the solar ceramic coating and the manufacturing method thereof, black ceramic particles are sand-planted on the surface of sheet metal, so that a solar selective absorption layer is formed. The surface of a heat absorption coating made of the ceramic particles is uneven, and the specific surface area of the uneven surface is 1.5-1.8 times of that of an even surface, the absorption area is increased, more solar (light) energy can be received, and the efficiency of a metal heat collector is improved greatly.

Description

technical field [0001] The invention relates to solar coating technology, in particular to a ceramic solar coating and a manufacturing method thereof. Background technique [0002] The heat-absorbing coating used in the current metal flat-plate solar collectors is sprayed on the surface of the heat collector after using water-based acrylic resin as a binder to mix the heat-absorbing paint, but the infrared emissivity of the sprayed paint is high, resulting in heat collection. At the same time, the binder may dissolve at high temperature, resulting in poor weather resistance and poor adhesion of the heat-absorbing coating, which is prone to peeling and reduces heat-absorbing performance. [0003] The anodic oxidation coating type coating will cause the copper pipe structure to be easily damaged during the production process, thereby reducing the heat absorption efficiency. [0004] Due to the unsatisfactory weather resistance of the magnetron sputtering coating, the performa...

AI Technical Summary

Problems solved by technology

[0002] The heat-absorbing coating used in the current metal flat-plate solar collectors is sprayed on the surface of the heat collector after using water-based acrylic resin as a binder to mix the heat-absorbing paint, but the infrared emissivity of the sprayed paint is high, resulting in heat collection. The thermal insulation performance of the device is poor. At the same time, the adhesive may dissolve at high temperature, resulting in poor weather resistance and poor adhesion of the heat-absorbing coating, which is prone to peeling off and reduces the heat-absorbing performance.

[0003] Anodized coatings will cause the structure of the copper tube to be easily damaged during the production process, thereby reducing the heat absorption efficiency

[0004] Due to the unsatisfactory weather resistance of the magnetron sputtering coating, the performance will decay or even the coating will fall off after a long time

[0005] The coating produced by the electroplating black chrome process needs to lay a bottom layer on the plated parts first, such as plating copper and nickel layers to increase the adhesion, and then can be plated with black chrome, which has high requirements on the process. If the process design and production control are not proper, it is easy to Cause environmental pollution, high cost of sewage treatment

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