High-temperature infrared radiation glaze and preparation method thereof

Abstract

The invention relates to a high-temperature infrared radiation glaze and a preparation method thereof. The high-temperature infrared radiation glaze is characterized by comprising the following main constituent components in percentage by weight: 5-40% of glass flake, 10-17% of frit, 17-30% of chromium sesquioxide, 1-2% of calcium fluoride, 6-23% of base enamel, 7-12% of cordierite, 5-10% of high-emissivity material, and 0.4-2.0% of emulsus nanometer aluminium sesquioxide, wherein the sum of the glass flake and the frit is 22-50%. The high-temperature infrared radiation glaze disclosed by theinvention has a good suspension property and a good opacifying effect, a glaze layer with the advantages of smooth surface, high uniformity, high mechanical strength and good thermal-shock resistancecan be formed on the surface of a matrix by only spraying or coating the glaze once, and the formed glaze layer is easy to sinter and difficult in falling; and the high-temperature infrared radiationglaze has the long-term use temperature capable of reaching 1050 DEG C and the normal total emissivity of 0.87-0.92 in a total infrared band of 2.5-20mum, can be applied to metal heating substrates such as heat-resistant steel and the like in various heating and drying equipment, and has a wide application range.

Description

technical field [0001] The invention relates to a high-temperature infrared radiation glaze and a preparation method thereof. Background technique [0002] In recent years, various low and medium temperature infrared radiation glaze materials have been developed rapidly, such as the patent CN 1463940A, but its use temperature is below 850 ° C, and the high infrared radiation area is limited to the 8-25 μm far infrared band, which is not conducive to high temperature. Radiative heat transfer. The high-temperature enamel coating technology introduced by the Ministry of Aviation Industry of my country from the former Soviet Union has finalized three products such as W-2, T-1 and B-1000 after years of experimental research by the Aeronautical Materials Research Institute, but the substrate can only be nickel-cobalt alloy, and the preparation process is strict, it must be prepared in special equipment; it cannot be applied to civilian products yet. The high-temperature glazes re...

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Problems solved by technology

[0002] In recent years, various low and medium temperature infrared radiation glaze materials have been developed rapidly, such as the patent CN 1463940A, but its use temperature is below 850 ° C, and the high infrared radiation area is limited to the 8-25 μm far infrared band, which is not conducive to high temperature. radiation heat transfer

The high-temperature enamel coating technology introduced by the Ministry of Aviation Industry of my country from the former Soviet Union has finalized three products such as W-2, T-1 and B-1000 after years of experimental research by the Aeronautical Materials Research Institute, but the substrate can only be nickel-cobalt alloy, and the preparation process is strict, and must be prepared in special equipment; it cannot be applied to civilian products

The high-temperature glazes announced by the United States, Japan, South Korea and other countries, such as NBSA-19, etc., although the use temperature reaches 1000 ° C, are expensive and do not have high radiation function, and some also contain beryllium oxide which is harmful to human body

The Chinese patent "A High-temperature Anti-Carburizing and Corrosion-resistant Infrared Radiation Glaze and Its Preparation Method, Publication No. CN1837117A" discloses that the use temperature is higher than 850 ° C, the emissivity of the 2.5-20 μm full infrared band is high, and it is used for heat-resistant metal surfaces. Radiation glaze and its preparation method have poor suspending and opacifying properties, so in order to reduce loose pores and form a dense glaze layer, it needs to be sprayed or painted three times, so the thickness of the glaze layer is as high as 0.17-0.22 mm, which not only wastes Glaze, and the thickness of the glaze layer is uneven, the mechanical strength and thermal shock resistance are reduced, and there are unclear material names in the composition, which makes it difficult to implement

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