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...

Examples

Embodiment 1-2

[0025] Table 1: Recipe Table

[0026]

[0027] In the above Table 1, the content of each component in the base material is the percentage by mass, and the content of the additive is the percentage by mass of the base material.

[0028] In Example 1, the preparation steps are as follows: Step 1) Weighing; According to the ratio of various raw materials in the No. 1 formula in Table 1: formula table, the raw materials are weighed;

[0029] Step 2) Mixing and crushing; add the raw materials after step 1) in proportion to 50% of the mass of the base material, and then put them into a ball mill for wet crushing and ball milling to obtain mud;

[0030] Step 3) sieve and spray dry; pass the slurry prepared in step 2) through 12 mesh, 60 mesh and 120 mesh sieves in sequence, then spray dry and granulate to obtain powder;

[0031] Step 4) Pressing, firing, and crushing: Press the powder after step 3) into a green body and dry it into a roller kiln for firing to obtain a black porce...

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...

Examples

Embodiment 1-2

[0025] Table 1: Recipe Table

[0026]

[0027] In the above Table 1, the content of each component in the base material is the percentage by mass, and the content of the additive is the percentage by mass of the base material.

[0028] In Example 1, the preparation steps are as follows: Step 1) Weighing; According to the ratio of various raw materials in the No. 1 formula in Table 1: formula table, the raw materials are weighed;

[0029] Step 2) Mixing and crushing; add the raw materials after step 1) in proportion to 50% of the mass of the base material, and then put them into a ball mill for wet crushing and ball milling to obtain mud;

[0030] Step 3) sieve and spray dry; pass the slurry prepared in step 2) through 12 mesh, 60 mesh and 120 mesh sieves in sequence, then spray dry and granulate to obtain powder;

[0031] Step 4) Pressing, firing, and crushing: Press the powder after step 3) into a green body and dry it into a roller kiln for firing to obtain a black porce...

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