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An anti-oxidation high-temperature infrared radiation ceramic coating and its preparation method and application

A ceramic coating, high-temperature infrared technology, applied in the direction of coating, etc., can solve the problems of unstable emissivity, shedding, low infrared radiation rate, etc., and achieve the effect of excellent oxidation resistance, excellent thermal shock resistance and high emissivity

Active Publication Date: 2017-07-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problems of these coatings are high-temperature oxidation, ablation and shedding in an oxidizing atmosphere, which seriously affects the long-term service and use of energy-saving products in high-temperature environments.
And domestic CN101343427A, CN101481551A and CN102219492A and other patents disclosed in the energy-saving coatings based on transition metal oxides and metal oxide systems radiation base materials, in high temperature use due to changes in the phase, resulting in emissivity instability and Attenuation, while the infrared radiation rate of the short-wave band corresponding to the high temperature is not high

Method used

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  • An anti-oxidation high-temperature infrared radiation ceramic coating and its preparation method and application
  • An anti-oxidation high-temperature infrared radiation ceramic coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1) Preparation of paint

[0039] Calcium-chromium ion-doped lanthanum aluminate was prepared according to the method of the patent (CN2015101198851); 1 kg of calcium-chromium ion-doped lanthanum aluminate was mixed with 2000 ml of absolute alcohol, and star-shaped ball milled for 2 hours; after ball milling, it was dried to obtain 325 mesh Radiation base material of particle size; 1 kg of said radiation base material, 150 g of ultrafine nano silicon dioxide, 15 g of polyacrylic acid with an average degree of polymerization of 3000, 50 g of polyvinyl alcohol with an average degree of polymerization of 1750 and 1.66 kg of water are mixed and stirred , put into a star ball mill and mix at high speed for 2 hours. Made into anti-oxidation high temperature coating.

[0040] 2) Use of paint

[0041] Send the anti-oxidation high-temperature paint into the F-75 spray gun. Under the condition of 0.4MPa pressure, the spraying distance is 20cm, and the spraying time is 5 seconds....

Embodiment 2

[0044] 1) Preparation of paint

[0045] Calcium-chromium ion-doped lanthanum aluminate was prepared according to the method of the patent (CN2015101198851); 1 kg of calcium-chromium ion-doped lanthanum aluminate was mixed with 5000 ml of anhydrous alcohol, and star-shaped ball milled for 2 hours; after ball milling, it was dried to obtain 325 mesh The radiation base material of particle size; the said radiation base material of 1kg, the superfine nano silicon dioxide of 50g, the polyacrylic acid that the average polymerization degree of 15g is 3000, the polyvinyl alcohol and the water of 1.0kg that the average polymerization degree of 50g is 1750 Mix and stir, put into a star ball mill and mix at high speed for 2 hours. Made into anti-oxidation high temperature coating.

[0046] 2) Use of paint

[0047] Send the anti-oxidation high-temperature paint into the F-75 spray gun. Under the condition of 0.4MPa pressure, the spraying distance is 20cm, and the spraying time is 5 seco...

Embodiment 3

[0050] 1) Preparation of paint

[0051] Prepare calcium-chromium ion-doped lanthanum aluminate according to the method of the patent (CN2015101198851); mix 1kg of calcium-chromium ion-doped lanthanum aluminate with 3000ml of absolute alcohol, star ball mill for 2 hours; dry after ball milling to obtain 325 mesh Radiation base material of particle size; 1kg of the radiation base material, 300g of silica sol, 15g of polyacrylic acid with an average degree of polymerization of 4500, 50g of polyvinyl alcohol with an average degree of polymerization of 1000 and 560g of water are mixed and stirred, and put into a star shape The ball mill was mixed at high speed for 2 hours. Made into anti-oxidation high temperature coating.

[0052] 2) Use of paint

[0053] Send the anti-oxidation high-temperature paint into the W77 spray gun. Under the condition of 0.4MPa pressure, the spraying distance is 20cm, the spraying time is 5 seconds, and it is dried for 24 hours after spraying. Put the...

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Abstract

The invention discloses an anti-oxidant high-temperature infrared radiation ceramic coating and a preparation method and application thereof. The ceramic coating comprises, by mass, 30-70% of calcium-chromium ion doped lanthanum aluminate, 0.5-20% of superfine silicon dioxide and / or ludox, 0.05-5% of polyacrylic acid, 0.1-10% of polyvinyl alcohol and 20-70% of water. The ceramic coating has the advantages of being excellent in anti-oxidant performance, stable in high temperature, high in emissivity and excellent in thermal shock resistance, can be sprayed into high-temperature kilns heated by electricity, fuel gas, fuel oil, coal and the like, and can be easily constructed on various base plates made of refractory materials. The prepared anti-oxidant high-temperature infrared radiation ceramic coating can be firmly attached to surfaces of refractory linings for a long time without falling down after forming a film at a high temperature.

Description

technical field [0001] The invention relates to the technical field of inorganic materials, more specifically, to an oxidation-resistant high-temperature infrared radiation ceramic material and a coating preparation method thereof. Background technique [0002] Under the strategic requirements of the national industrial structure adjustment, it is very urgent to improve the thermal efficiency of industrial furnaces and develop advanced energy-saving technologies. Radiation energy-saving technology is one of the typical technologies for realizing energy-saving of furnaces. By strengthening the radiation heat transfer in high-temperature (≥800°C) environments, the heat utilization efficiency of furnaces can be maximized. In steel, building materials, petrochemical, ceramics, power generation and other industrial fields, the refractory lining materials of heating furnaces, hot blast furnaces, cracking furnaces, power generation boilers and other furnace bodies are mostly silico...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D7/12
Inventor 叶建克布丛郝李江涛
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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