High-temperature-resistance infrared-radiation-attenuation-resistance energy-saving coating

Abstract

The invention discloses a high-temperature-resistance infrared-radiation-attenuation-resistance energy-saving coating. The coating is prepared from, by weight, 10-20 parts of LaAlO3 spherical powder doped with calcium and chromium ions, 10-20 parts of metallic oxide infrared radiation micro powder, 5-10 parts of titanium carbide-cordierite infrared radiation micro powder, 15-25 parts of filler, 0.1-0.2 part of a retardant, 30-50 parts of an adhesive, 10-20 parts of a solvent, 0.15-0.25 part of a dispersion agent, 0.1-0.35 part of a coupling agent and 0.05-0.15 part of a defoaming agent. The invention further discloses a preparation method of the coating. The coating comprises the following steps of step one, raw material preparation; step two, high temperature treatment; step three, high shearing dispersion; step four, coating preparation. The infrared radiation rate of the full-wave band of the provided energy-saving coating is 0.94-0.98, infrared radiation attenuation can be effectively prevented, after long-time using of the coating, the phenomena of cracking and coating shedding cannot occur, and the thermal shock resistance is high.

Description

Technical field [0001] The invention relates to the technical field of coatings, in particular to a high temperature resistant and infrared radiation attenuation energy-saving coating. Background technique [0002] Infrared radiation coatings are applied to the heat-absorbing surfaces of various industrial furnaces and civil boilers. Using the principle of high absorption rate and high emissivity of thermal radiation of the coating, it can improve the absorption of furnace flame heat by the furnace lining or boiler tube wall. Improve the furnace heat exchange conditions, increase thermal efficiency, and at the same time have a good protective effect on the furnace lining material against high temperature oxidation, extend the service life of the furnace and boiler, and reduce the maintenance workload. In addition, by strengthening the radiant heat transfer in the furnace, the temperature uniformity of the heating field in the furnace and the heating quality of the heated body are...

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation of energy-saving coating products mostly uses micro-nano powder as raw material, because the smaller the particle size of the powder, the larger the specific surface and the higher the emissivity; or the multi-component doping system material is used as raw material to increase the complexity of the internal structure of the crystal Then improve the infrared radiation rate of the material; however, most of the micro-nano raw materials and diversified doping system raw materials still have the problems of low radiation and uneven distribution of wave bands, which makes the applicable temperature range narrow and the energy-saving effect is not high.

The existing infrared radiation energy-saving coatings usually use binders such as water glass and silica sol, which makes the coating use temperature lower and the bonding strength poorer. Coating Peeling

In addition, when used at high temperature for a long time, there will be problems of crystal growth and sintering shrinkage, which will lead to the decrease of crystal activity and gradually reduce the infrared radiation rate of the coating, and cracks will appear when the coating shrinks to a certain extent at high temperature , Peeling phenomenon and then affect the use effect of the coating

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