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A kind of infrared radiation coating and preparation method thereof

An infrared radiation coating and infrared radiation technology, applied in the field of energy-saving materials, can solve the problems of unsatisfactory metal matrix bonding ability, poor adhesion between coating and matrix, unstable coating emissivity, etc., achieving large lattice distortion and short holding time. , the effect of stable infrared emissivity

Active Publication Date: 2017-12-29
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of research and application development of infrared radiation materials, there have always been two technical bottlenecks in infrared radiation coatings: one is that the emissivity of coatings is unstable, and as the temperature rises, the emission wavelength shifts to short-wave bands, such as the British ET-4 coating in The emissivity is greater than 0.9 at 400°C, and 0.84 at 1000°C. High-emissivity infrared materials in short-wave bands need to be developed for coatings; second, the adhesion between the coating and the substrate is poor, and it is easy to fall off, especially the ability to combine with the metal substrate It is not ideal, and the coating may fall off from the surface of the metal substrate during use. For example, the application temperature of the British ET-4 coating on the metal surface cannot exceed 1100 ° C, otherwise it will fall off

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  • A kind of infrared radiation coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] An infrared radiation coating, the preparation steps are as follows:

[0036] 1) Spinel structure infrared radiation powder

[0037] Weigh each raw material according to the proportion, and each raw material and its mass percentage are: FeTiO 3 60%, Fe 2 O 3 7.5%、MnO 2 7.5%, Co 2 O 3 7.5%、CuO 7.5%、Cr 2 O 3 10%, mix the weighed raw materials and disperse them in absolute ethanol, rotating and wet mixing for no less than 12 hours, and then dry the mixed wet material to obtain a mixture; place the mixture in a graphite reactor and Put it into a high-current pulse reaction synthesis device, apply pulse current directly to the graphite reactor under vacuum (≤10Pa), heat it to 1150℃ at a heating rate of 400℃ / min, keep it for 5 minutes, and get spinel after natural cooling Synthetic powder with stone structure; put the synthetic powder in a vacuum ball milling tank, the grinding medium is alumina, the ball-to-battery ratio is 30:1, and the spinel with a particle size of ≤2μm i...

Embodiment 2

[0042] An infrared radiation coating, the preparation steps are as follows:

[0043] 1) Spinel structure infrared radiation powder

[0044] Weigh each raw material according to the proportion, and each raw material and its mass percentage are: FeTiO 3 60%, Fe 2 O 3 7.5%、MnO 2 7.5%, Co 2 O 3 7.5%、CuO 7.5%、Cr 2 O 3 10%, mix the weighed raw materials and disperse them in absolute ethanol, rotating and wet mixing for no less than 12 hours, and then dry the mixed wet material to obtain a mixture; place the mixture in a graphite reactor and Put it into a high-current pulse reaction synthesis device, apply pulse current directly to the graphite reactor under vacuum (≤10Pa), heat it to 1050°C at a heating rate of 200°C / min, keep it for 15 minutes, and cool down naturally to obtain spinel Synthetic powder with stone structure; put the synthetic powder in a vacuum ball milling tank, the grinding medium is alumina, the ball-to-battery ratio is 30:1, ball milled at 300r / min for 24h to obt...

Embodiment 3

[0049] An infrared radiation coating, the preparation steps are as follows:

[0050] 1) Spinel structure infrared radiation powder

[0051] Weigh each raw material according to the proportion, and each raw material and its mass percentage are: FeTiO 3 42%, Fe 2 O 3 10%, MnO 2 10%, Co 2 O 3 10%, CuO 10%, Cr 2 O 3 18%, mix the weighed raw materials and disperse them in absolute ethanol, rotating and wet mixing for no less than 12 hours, and then drying the mixed wet material to obtain a mixture; place the mixture in a graphite reactor and Put it into a high-current pulse reaction synthesis device, apply pulse current directly to the graphite reactor under vacuum (≤10Pa), heat it to 1200°C at a heating rate of 400°C / min, keep it for 5 minutes, and cool down naturally to obtain spinel Synthetic powder with stone structure; place the synthetic powder in a vacuum ball milling tank, the grinding medium is alumina, the ball-to-battery ratio is 30:1, and the spinel with a particle size...

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Abstract

The invention provides an infrared radiation paint and a preparation method thereof. The infrared radiation paint is formed by mixing a composite infrared radiation material and an organic-inorganic binder in a mass ratio of 100:(175-300), wherein the composite infrared radiation material is prepared from spinel-structure high infrared radiation powder, alundum powder, SiO2 powder, cordierite and glaze powder; and the organic-inorganic binder is formed by mixing a silicon-chromium-aluminum composite sol, silicate and potassium nitrate. The infrared radiation paint provided by the invention has favorable high-temperature stability and infrared radiation property, can be firmly bound with refractory steel and other metal matrixes, can not crack or shed after being used at the high temperature of 1000-1200 DEG C for a long time, has the advantages of favorable corrosion resistance, favorable thermal shock resistance and the like, and is suitable for popularization and application.

Description

Technical field [0001] The invention relates to the field of energy-saving materials, in particular to an infrared radiation coating for metal surfaces and a preparation method thereof. Background technique [0002] Infrared radiation coating is a functional material that can improve the energy utilization rate of industrial furnaces such as boilers and heating furnaces, and play a role in energy saving and consumption reduction. Coating the infrared radiation paint on the surface of the furnace heating body and the furnace wall can enhance the radiation heat transfer efficiency in the furnace, improve the temperature uniformity in the furnace, and improve the energy utilization efficiency and thermal efficiency. [0003] The more famous infrared coatings abroad mainly include ET-4 from CRC in the United Kingdom, CRC-10A from the United States, and CRC1100 and 1150 from Japan. Although the development and application of infrared radiation coatings in my country started late, after...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/08C09D7/12
CPCC09D1/00C09D5/08C09D7/61
Inventor 杜贤武朱小平丁翠娇韩斌
Owner 武汉钢铁有限公司
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