Thermal radiation coating for black body

Abstract

The invention discloses a thermal radiation coating for a black body, the thermal radiation coating includes a base material, an additive, a binder, a plasticizer and a solvent, the base material and the additive are selected from five or all of zinc aluminum spinel powder, chrome aluminum spinel powder, titanium iron ore powder, boron carbide, iron oxide and silicon micropowder, the binder comprises liquid aluminum dihydrogen phosphate and liquid magnesium hydrogen phosphate, the weight percentages of the base material and the additive are 6% - 75%, the weight percentage of the binder is 5% - 29%, the weight percentage of the plasticizer is 0.5% - 3%, and the rest is the solvent. The thermal radiation coating has a wide working temperature range, can be used at more than 1400 DEG C with the highest use temperature up to about 1800 DEG C, is suitable for various matrixes, is strong in matrix adhesion, is suitable for acid-base multiple atmospheres, good in long-term durability and high in thermal shock resistance capability, improves energy utilization thermal efficiency, reduces the temperature of a matrix covered with the coating, is good in wear resistance and corrosion resistance, less in environmental impact and easy to use.

Description

technical field [0001] The invention relates to a thermal radiation coating for black bodies, more precisely, relates to a high-emissivity coating that can improve the emissivity of industrialized black bodies, and can be applied to standard black bodies, industrial standard black bodies or large-scale industrial black bodies. Background technique [0002] A black body is a concept in physics, and its emissivity and absorptivity are equal to 1. In fact, a true black body does not exist. Therefore, in industrial heating, in order to improve the heating efficiency, an industrialized blackbody is often installed in the furnace. In order to maximize the emissivity of the industrialized blackbody, a high-emissivity coating is often applied inside and outside the blackbody cavity. Utilize the principle of high absorption rate and high emissivity of the coating on thermal radiation, improve the heat absorption of the furnace flame by the high-temperature blackbody cavity, improve ...

AI Technical Summary

Problems solved by technology

[0004] The following factors should be considered in the design of thermal radiation coatings for black bodies: relatively stable high emissivity at high temperatures; suitable particle size; thermal expansion matching with the substrate, mechanical bonding, chemical bonding, high temperature characteristics of the coating, resistance Corrosion and wear resistance; good adhesion and rheology at room temperature, easy to apply; finally there is the cost of the coating, if the cost of the coating is much higher than the planned energy recovery, then this coating is not worth any economical