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A composite high temperature resistant high infrared emissivity coating and its preparation method

A technology of infrared emissivity and high temperature resistance, applied in the field of infrared radiation coating materials

Inactive Publication Date: 2019-11-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the spinel system, nickel-chromium spinel and its metal doping have been mainly studied in China, and good results have been achieved, but the addition of non-oxides to the nickel-chromium system has hardly been studied.

Method used

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  • A composite high temperature resistant high infrared emissivity coating and its preparation method
  • A composite high temperature resistant high infrared emissivity coating and its preparation method
  • A composite high temperature resistant high infrared emissivity coating and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0023] a Cr 2 o 3 , NiO, B 2 o 3 Composite high-temperature-resistant high-infrared emissivity coating is prepared by the following method: (1) weighed Cr 2 o 3 , NiO, B 2 o 3 Add 5L water and 5g binder to the powder and mix evenly, Cr 2 o 3 , NiO, B 2 o 3 The molar ratio of the powder is 1:4.1:1.1 (the corresponding masses are 152.0g, 306.3g and 76.6g respectively), pour it into the pouring mill and grind it for half an hour, and then send the slurry into the rotary spray drying tower through the feeding pump The precursor composite powder was obtained by drying; the inlet temperature of the rotary spray drying tower was set at 190°C, the outlet temperature was set at 90°C, the feed rate was set at 45mL / min, and the rotation speed of the atomizing disc was set at 30000r / min. Precursor composite powder. (2) Sieve the obtained precursor composite powder through a shaker, collect the powder with a particle size of 40-60 μm for use, and then put the powder of 40-60 μm ...

Embodiment 2

[0027] a Cr 2 o 3 , NiO, B 2 o 3 Composite high-temperature-resistant high-infrared emissivity coating is prepared by the following method: (1) weighed Cr 2 o 3 , NiO, B 2 o 3 Add 5L water and 5g binder to the powder and mix evenly, Cr 2 o 3 , NiO, B 2 o 3 The molar ratio of the powder is 1:4.1:1.3 (the corresponding masses are 152.0g, 306.3g and 90.5g respectively), pour it into the pouring mill and grind it for half an hour, and then send the slurry into the rotary spray drying tower through the feeding pump The precursor composite powder was obtained by drying; the inlet temperature of the rotary spray drying tower was set at 190°C, the outlet temperature was set at 90°C, the feed rate was set at 45mL / min, and the rotation speed of the atomizing disc was set at 30000r / min. Precursor composite powder; (2) Sieve the obtained precursor composite powder through a shaker, collect powder with a particle size of 40-60 μm for use, and then put the powder of 40-60 μm into ...

Embodiment 3

[0031] a Cr 2 o 3 , NiO, B 2 o 3 Composite high-temperature-resistant high-infrared emissivity coating is prepared by the following method: (1) weighed Cr 2 o 3 , NiO, B 2 o 3 Add 5L water and 5g binder to the powder and mix evenly, Cr 2 o 3 , NiO, B 2 o 3 The molar ratio of the powder is 1:4.5:1.1 (the corresponding masses are 152.0g, 336.2g and 76.6g respectively), pour it into the pouring mill and grind it for half an hour, and then send the slurry into the rotary spray drying tower through the feeding pump The precursor composite powder was obtained by drying; the inlet temperature of the rotary spray drying tower was set at 190°C, the outlet temperature was set at 90°C, the feed rate was set at 45mL / min, and the rotation speed of the atomizing disc was set at 30000r / min. Precursor composite powder; (2) Sieve the obtained precursor composite powder through a shaker, collect powder with a particle size of 40-60 μm for use, and then put the powder of 40-60 μm into ...

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Abstract

The invention belongs to the field of an infrared ray radiation coating material, and particularly relates to a composite high-temperature-resistant high-infrared-ray-emission-rate coating and a preparation method thereof. The preparation method comprises the following steps of adding water into Cr2O3, NiO and B2O3 which are proportionally mixed; performing grinding to obtain uniform slurry; then,feeding the slurry into a rotary spray coating drying tower to be dried to obtain a precursor composite powder; sieving the precursor composite powder; then, putting the materials into a muffle furnace; performing high-temperature sintering; obtaining high-temperature sintering composite powder; using plasma spray coating technology for spraying and coating the composite powder subjected to high-temperature sintering onto a stainless steel substrate subjected to pretreatment to prepare the high-temperature-resistant high-infrared-ray-emission-rate coating. The prepared high-infrared-ray-emission-rate coating has the emission rate being higher than 0.89 at the wave band of 0.76 to 2.5mu m and has the emission rate being 0.92 or more at the wave band of 2.5 to 14 mu m.

Description

technical field [0001] The invention belongs to the field of infrared radiation coating materials, and in particular relates to a composite high-temperature-resistant high-infrared emissivity coating and a preparation method thereof. Background technique [0002] Due to the energy crisis and the increasingly serious environmental pollution, energy conservation and environmental protection have gradually become the focus of people's attention. For example, industrial furnaces have always been large energy consumers, so it is particularly important to take thermal insulation and energy-saving measures for industrial furnaces. Coating a layer of high infrared emission coating on the inner wall of the industrial furnace can re-radiate most of the heat energy to be lost into the furnace, playing the role of heat preservation and energy saving. At present, research on high infrared emissivity materials at home and abroad mainly focuses on several aspects such as "spinel system", ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00
CPCC09D1/00C09D5/18
Inventor 程旭东李永甲柯成竹
Owner WUHAN UNIV OF TECH