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Method for preparing high-temperature resistant anti-infrared thermal radiation energy-saving coating

An energy-saving coating and heat radiation technology, applied in the field of heat-insulating coatings, can solve problems such as high reflectivity, achieve high reflectivity, simple construction, and improved infrared reflection performance

Inactive Publication Date: 2010-06-09
NANJING TECH UNIV +1
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  • Description
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Problems solved by technology

[0007] Since when the temperature is greater than 400°C, the radiation heat transfer mode is the dominant heat transfer mode, the purpose of the present invention is to overcome the existing anti-infrared heat radiation coatings that cannot fully meet the requirements of high temperature resistance (400-1200°C) and infrared radiation resistance. It has the disadvantage of high reflectivity, and provides a preparation method of high temperature resistant anti-infrared heat radiation energy-saving coating

Method used

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  • Method for preparing high-temperature resistant anti-infrared thermal radiation energy-saving coating

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Embodiment 1

[0025] Potassium hexatitanate whiskers with a whisker length of 10-50 μm are added to the sol containing titanium and potassium elements, and the content of titanium and potassium elements is measured as TiO 2 、K 2 O meter, TiO 2 : K 2 O=6:1 (molar ratio), stir evenly to form a slurry, the content of whiskers in the slurry is 40wt%; the slurry is coated on the surface of traditional refractory materials, and sintered at 500 ° C for 0.5h to form a thickness of 2mm coating. The reflectance of the coating at a wavelength of 300-2500nm was tested with a lambda 950 UV-visible spectrophotometer, and the results are shown in the attached figure 2 As shown, the reflectivity of the coating to the wavelength of 500-2500nm is greater than 96%, and there is no attenuation in the entire wavelength range, while the attached figure 1 The infrared reflectance (curve B) of the heat insulation material invented by the patent USA: US3296060 and the infrared reflectance (curve A) of the heat...

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Abstract

The invention discloses a method for preparing a high-temperature resistant anti-infrared thermal radiation energy-saving coating. The method comprises the following steps of: adding inorganic crystal whisker or / and fiber materials to sol containing titanium and kalium elements, evenly stirring the mixture to form pulp; and coating the pulp on the surface of heat insulating materials, fireproof materials or thermal insulating materials, and sintering the pulp at the temperature of between 200 and 700 DEG C for 0.5 to 5 hours to form compact coatings with the thickness of 0.1 to 5mm, wherein the content of the inorganic crystal whisker or / and fiber materials in the pulp is 5 to 70 weight percent. In the temperature range of between 400 and 1,200 DEG C, the reflectivity of the compact coating which is prepared by the method in a thickness of 0.1 to 5mm on the infrared thermal radiation with the wave length of 500 to 2,500nm is over 90 percent, and after the coating of the invention undergoes 5 thermal shock stability tests at the temperature of 1,000 DEG C, no crack occurs.

Description

technical field [0001] The invention belongs to the field of heat-insulating coatings, and in particular relates to a preparation method of a heat-insulating coating capable of reflecting infrared heat radiation at high temperatures. Background technique [0002] With the rapid development of my country's economy, the demand for energy is increasing day by day, and energy shortage has become an important constraint factor for economic development. Industrial furnaces are the main energy-consuming equipment in industrial production and consume a huge amount of energy every year. Especially in the heating process in metallurgy, building materials, ceramics, glass, chemical and electromechanical enterprises, the energy consumption of industrial furnaces can account for 40-70% of the total energy consumption [1] . As of 2007, there were about 120,000 industrial furnaces of various types in my country, with a total annual energy consumption of 250 million tce, accounting for ab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
Inventor 陆小华刘海龙王昌松姚文俊安蓉杨祝红
Owner NANJING TECH UNIV
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