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Chromium-free high-temperature infrared energy-saving coating and its preparation method and application
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An energy-saving coating and high-temperature infrared technology, applied in the direction of alkali metal silicate coatings, coatings, etc., can solve the problems of short storage time, complicated preparation process, and shedding, and achieve the effect of simple construction, simple preparation, and elimination of pollution
Active Publication Date: 2016-01-20
山东慧敏科技开发有限公司
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Problems solved by technology
[0006] (1) The adhesion between the paint and the substrate is poor, and it is easy to fall off. For example, the temperature of the British ET-4 paint on the metal surface cannot be higher than 1100 ° C, otherwise it will fall off, which seriously restricts the application of the paint on industrial boilers;
[0007] (2) The preparation process is complicated and the cost is high. For example, CRC1000 and CRC1500 in Japan need to be calcined at a high temperature of 1200-1400°C, and then pulverized to prepare coatings;
[0008] ⑶ Poor suspension of the paint, short storage time, and serious agglomeration will occur if left for a long time
Method used
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Embodiment 1
[0059] Embodiment 1: The components of the chrome-free high-temperature infrared coating are as follows, all in parts by weight:
[0060] Group A:
[0061]
[0062] The particle size of each solid component above is 325 mesh and passes through completely.
[0063] Group B:
[0064] 150 copies of PA80 glue
[0065] 170 parts of water;
[0066] The preparation method is as follows:
[0067] Weigh, mix and grind the raw materials of group A according to the proportion; mix with the weighed raw materials of group B according to the proportion, stir evenly, and make a viscous suspension fluid, which is the high-temperature infrared coating product.
[0068] The linear expansion coefficient ( / °C) of the coating is 9.21×10 -6 , thermal conductivity (w / m·k) 0.98. The coefficient of expansion is similar to that of the base material, the adhesion strength is good, the thermal shock resistance is good, and it is not easy to fall off.
Embodiment 2
[0069] Embodiment 2: The components of the chrome-free high-temperature infrared coating are as follows, all in parts by weight:
[0070]
[0071] The particle size of each solid component above is 325 mesh and passes through completely.
[0072] The preparation method is the same as in Example 1.
[0073] The linear expansion coefficient ( / °C) of the obtained high-temperature infrared coating is 9.68×10 -6 , thermal conductivity (w / m·k) 1.03. The coefficient of expansion is similar to that of the base material, the adhesion strength is good, the thermal shock resistance is good, and it is not easy to fall off.
Embodiment 3
[0075] The components of the chromium-free high-temperature infrared coating are as follows, all in parts by weight:
[0076]
[0077] The particle size of the above solid components is 800 mesh and passes through completely. The preparation method is the same as in Example 1.
[0078] The linear expansion coefficient ( / °C) of the obtained high-temperature infrared coating product is 8.96×10 -6 , thermal conductivity (w / m·k) 1.02. The coefficient of expansion is similar to that of the base material, the adhesion strength is good, the thermal shock resistance is good, and it is not easy to fall off.
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Abstract
The invention relates to a non-Cr high-temperature infrared energy-saving coating, and a preparation method and application thereof. The coating comprises: a group A of raw materials including silicon oxide, zirconium oxide, clay, bentonite, SiC, titanium oxide and brown fused alumina, and a group B of raw materials including PA80 glue or water glass and water, wherein the group A of raw materials are mixed together proportionally and ground to be below 15 microns. The raw materials in the group A and the group B are mixed together and stirred to form a thick suspension fluid; and as a result, the non-chrome high-temperature infrared coating is obtained. All the components of the coating provided by the invention are non-toxic; the coating contains no Cr element and is friendly to environment, and can be used for coating a metal or fireproofing material matrix in an industrial kiln; and therefore, the heat storage capacity of the fireproofing material matrix can be increased and the gas energy consumption can be reduced.
Description
technical field [0001] The invention relates to a chromium-free high-temperature infrared radiation energy-saving coating and a preparation method and application thereof, belonging to the technical field of high-temperature resistant infrared energy-saving coatings. Background technique [0002] High-temperature infrared coatings are composed of one or more high-emissivity materials through optimal combination to form their functional components, and then formulated with curing agents, dispersants, adhesives, etc. in a certain proportion. The energy-saving technology that utilizes efficiency has been widely used, made important contributions to industrial energy-saving and emission-reduction work, and produced greater economic and social benefits. In the past, people paid more attention to how to produce greater energy-saving effect on infrared coating technology, but did not pay enough attention to the impact of coating on the environment. [0003] Cr 2 o 3 It is non-to...
Claims
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Application Information
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