High-temperature infrared radiation coating and preparation method thereof

Abstract

The invention discloses a high-temperature infrared radiation coating and a preparation method thereof. The coating is prepared by mixing a solid material and a liquid material according to a weight ratio of 1:1.2, wherein the particle size of the components of the coating is between 100 nanometers and 2 micrometers; the liquid material is an adhesive; the solid material comprises the following components in percentage by weight: 20 to 35 percent of zirconium silicate, 5 to 15 percent of cordierite, 30 to 45 percent of brown fused alumina, 5 to 15 percent of silicon oxide, 5 to 15 percent of chromium oxide, 5 to 15 percent of ferric oxide, 1 to 5 percent of clay and 1 to 5 percent of modified bentonite. The coating has improved radiation performance and service life and has the characteristics of simple preparation process and low cost; when used in furnaces, the coating does not generate volatile matters and does not pollute products; the coating has excellent dispersion state and can be stored for a long time without dimixing; and the use temperature range is wide, and the coating is applicable to different furnace types.

Description

technical field [0001] The invention relates to a coating and a preparation method thereof, in particular to a high-temperature infrared radiation coating and a preparation method thereof. Background technique [0002] In recent years, infrared radiation coatings have been developed towards superfineness. Theoretical studies have shown that the nanometerization of high-emissivity energy-saving coatings can further increase the emissivity and absorptivity of coatings, thereby bringing more significant energy-saving effects. At the same time, the adhesion of ultra-fine particles on the substrate is extremely strong, and even some ultra-fine particles can penetrate into the substrate material, which completely changes and strengthens the surface properties of the substrate material, and can completely eliminate coating peeling and use effects. Even under extreme rapid cooling and rapid heating conditions, there will be no cracking and peeling on the surface. For example, the m...

AI Technical Summary

Problems solved by technology

However, the manufacturing process of nano-scale infrared radiation coatings is complicated and the cost is high.

[0003] At present, commercially available paints often add organic dispersants (such as CMC, etc.) to ensure the suspension and uniformity of the paint. During the storage of the paint, the dispersant is prone to failure and causes the paint to agglomerate, affecting construction and use.

At the same time, domestic coatings often use binders such as water glass and silica sol, which have low service temperature and poor bonding strength.