阅读说明：本技术 一种高温红外线辐射涂料及其制备方法 (High-temperature infrared radiation coating and preparation method thereof ) 是由 张崇关 于 2018-06-19 设计创作，主要内容包括：本发明公开了一种高温红外线辐射涂料及其制备方法,包括以下组分：Fe<Sub>2</Sub>O<Sub>3</Sub>、MnO<Sub>2</Sub>、CuO、Co<Sub>2</Sub>O<Sub>3</Sub>、Cr<Sub>2</Sub>O<Sub>3</Sub>、Al<Sub>2</Sub>O<Sub>3</Sub>、SiO<Sub>2</Sub>、粘接剂和水,其中各组分的组分含量按重量份计为：Fe<Sub>2</Sub>O<Sub>3</Sub>：15份－92份、MnO<Sub>2</Sub>：10份－88份、CuO：2份－57份、Co<Sub>2</Sub>O<Sub>3</Sub>：0份－42份、Cr<Sub>2</Sub>O<Sub>3</Sub>：12份－77份、Al<Sub>2</Sub>O<Sub>3</Sub>：11份-100份、SiO<Sub>2</Sub>：7份－100份、粘接剂0份-60份和水：0份-150份；包括如下步骤：(1)准备原料配方(以组分份数计)：Fe<Sub>2</Sub>O<Sub>3</Sub>：15份－92份、MnO<Sub>2</Sub>：10份－88份、CuO：2份－57份、Co<Sub>2</Sub>O<Sub>3</Sub>：0份－42份、Cr<Sub>2</Sub>O<Sub>3</Sub>：12份－77份、Al<Sub>2</Sub>O<Sub>3</Sub>：11份-53份、SiO<Sub>2</Sub>：7份－62份、粘接剂0份-60份和水：0份-150份；(2)将上述组分混合后,经球磨、成型、烧成、粉碎工序,制得涂料；本发明通过调整原料配方和工艺参数来实现红外涂料的高发射率、高抗热震性以及基体与涂料间的高粘着性,工艺简单、操作方便。(The invention discloses a high-temperature infrared radiation coating and a preparation method thereof, wherein the coating comprises the following components: fe 2 O 3 、MnO 2 、CuO、Co 2 O 3 、Cr 2 O 3 、Al 2 O 3 、SiO 2 The adhesive comprises the following components in parts by weight: fe 2 O 3 : 15 to 92 parts of MnO 2 : 10-88 parts of CuO: 2 to 57 portions of Co 2 O 3 : 0 to 42 portions of Cr 2 O 3 : 12 to 77 portions of Al 2 O 3 : 11 to 100 portions of SiO 2 : 7-100 parts of adhesive, 0-60 parts of water: 0 to 150 parts; the method comprises the following steps: (1) preparing a raw material formula (in parts by weight): fe 2 O 3 : 15 to 92 parts of MnO 2 : 10-88 parts of CuO: 2 to 57 portions of Co 2 O 3 : 0 to 42 portions of Cr 2 O 3 : 12 to 77 portions of Al 2 O 3 : 11 to 53 portions of SiO 2 : 7-62 parts of adhesive, 0-60 parts of water: 0 to 150 parts; (2) mixing the components, and performing ball milling, molding, firing and crushing to obtain the coating; the invention realizes high emissivity, high thermal shock resistance and high adhesion between the substrate and the coating by adjusting the raw material formula and the process parameters, and has simple process and convenient operation.)

1. The high-temperature infrared radiation coating is characterized by comprising the following raw material components: fe₂O₃、MnO₂、CuO、Co₂O₃、Cr₂O₃、Al₂O₃、SiO₂The adhesive comprises the following components in parts by weight: fe₂O₃: 15 to 92 parts of MnO₂: 10-88 parts of CuO: 2 to 57 portions of Co₂O₃: 0 to 42 portions of Cr₂O₃: 12 to 77 portions of Al₂O₃: 11 to 100 portions of SiO₂: 7-100 parts of adhesive, 0-60 parts of water: 0 to 150 portions.

2. A high temperature infrared radiation coating according to claim 1, wherein the components are in the following amounts: fe₂O₃: 15 to 64 parts of MnO₂: 27-58 parts of CuO: 7 to 36 portions of Co₂O₃: 5 to 42 portions of Cr₂O₃: 19 to 59 parts of Al₂O₃: 21 to 63 portions of SiO₂: 12-71 parts of adhesive, 0-45 parts of water: 0 to 100 portions.

3. A high temperature ir-radiation coating according to claim 2, wherein said binder comprises one or a mixture of two or more of sodium silicate, sodium aluminate, aluminum silicate, silica sol and alumina sol.

4. A method of producing a high temperature infrared radiation coating as claimed in any one of claims 1 to 3, characterized by comprising the steps of:

(1) preparing a raw material formula which comprises the following components in parts by weight: fe₂O₃: 15 to 92 parts of MnO₂: 10-88 parts of CuO: 2 to 57 portions of Co₂O₃: 0 to 42 portions of Cr₂O₃: 12 to 77 portions of Al₂O₃: 11 to 53 portions of SiO₂: 7-62 parts of adhesive: 0-60 parts and water: 0 to 150 parts;

(2) mixing the raw materials, adding the mixture into a ball mill, carrying out ball milling for 1-3 hours, and sieving the mixture through a 275-ion 325-mesh sieve to obtain a dried substance;

(3) and (3) pressing and molding the dried substance obtained in the step (2) under 0.01-50 MPa, then sintering for 1-6 hours under the atmosphere of 1000-1400 ℃, crushing, and sieving with a 200-and 325-mesh sieve to obtain the coating powder.

5. The method for preparing high temperature infrared coating according to claim 5, wherein when the water component in step (1) is greater than 0, a drying process is added before step (2).

6. The method as claimed in claim 4, wherein the ball milling step in step (2) is dry ball milling or wet ball milling.

7. A method for preparing a high temperature infrared radiation coating as claimed in claim 4, wherein in said step (3), the firing atmosphere is an oxidizing atmosphere or a reducing atmosphere.

8. A method as claimed in claim 4, wherein said coating is applied to a thickness of 0.05mm to 2.5 mm.

Technical Field

The invention belongs to the technical field of infrared coatings, and particularly relates to a high-temperature infrared radiation coating and a preparation method thereof.

Background

The infrared radiation is electromagnetic wave with wavelength in the range of 0.76-1000 μm, the heat effect is the basic characteristic, and the infrared radiation heating has the advantages of uniform and rapid heating and high-efficiency energy utilization. The infrared radiation coating is applied to the inner wall of refractory materials of an industrial kiln or the surfaces of a heat accumulator and a heat exchanger, the infrared radiation capability and the spectral characteristics of the surface of an object participating in radiation heat transfer in the kiln can be effectively improved, the radiation heat transfer efficiency in the kiln is enhanced, the uniformity of the temperature in the kiln is improved, the processes of heating, heat accumulation, heat exchange and the like are promoted, the effectiveness of energy utilization in the use process of the industrial kiln is improved, and the infrared radiation coating has good comprehensive benefits of reducing harmful gas emission, reducing the temperature of discharged flue gas, prolonging the service life of the industrial kiln and the like.

The firm combination of the infrared radiation coating and the substrate is the premise of playing the energy-saving function. At present, infrared radiation coatings in China are mainly used on the surface of a refractory material substrate, and the phenomenon of coating falling off frequently occurs, in addition, the application of the infrared radiation coatings on the surface of a metal substrate is difficult, and the phenomenon of serious falling off frequently occurs, so that the exertion of the coating effect is severely limited, and the phenomenon that the coating falls off from the surface of the substrate in the using process is common. The reason for this is that the coating has low adhesion with the substrate and insufficient firmness, and the coating has large thermal expansion performance difference with the substrate and poor thermal shock resistance, which causes large thermal stress on the contact surface of the coating and the substrate and causes the coating to fall off. This has become an important reason for influencing the popularization and application of the infrared radiation energy-saving paint. How to improve the stability of the infrared radiation performance of the coating and the firmness of the bonding of the coating and the substrate is a technical problem to be solved urgently in the industry.

In view of the above, the present invention is particularly proposed.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a high-temperature infrared radiation coating and a preparation method thereof, the coating has a compact surface, excellent infrared radiation performance and high-temperature stability, can be firmly combined with refractory materials, metals and other matrixes, and is not easy to crack and fall off after being used at high temperature for a long time, and is corrosion-resistant and high in thermal shock resistance.

In order to achieve the aim, the invention provides a high-temperature infrared radiation coating which comprises the following components: fe₂O₃、MnO₂、CuO、Co₂O₃、Cr₂O₃、Al₂O₃、SiO₂The adhesive comprises the following components in parts by weight: fe₂O₃: 15 to 92 parts of MnO₂: 10-88 parts of CuO: 2 to 57 portions of Co₂O₃: 0 to 42 portions of Cr₂O₃: 12 to 77 portions of Al₂O₃: 11 to 100 portions of SiO₂: 7-100 parts of adhesive, 0-60 parts of water: 0 to 150 portions.

Preferably, the components of each component comprise the following components in parts by weight: fe₂O₃: 15 to 64 parts of MnO₂: 27-58 parts of CuO: 7 to 36 portions of Co₂O₃: 5 to 42 portions of Cr₂O₃: 19 to 59 parts of Al₂O₃: 21 to 63 portions of SiO₂: 12-71 parts of adhesive, 0-45 parts of water: 0 to 100 portions;

preferably, the adhesive comprises one or a mixture of more than two of sodium silicate, sodium aluminate, aluminum silicate, silica sol and aluminum sol;

preferably, the method comprises the following steps:

(1) preparing a raw material formula which comprises the following components in parts by weight: fe₂O₃: 15 to 92 parts of MnO₂: 10-88 parts of CuO: 2 to 57 portions of Co₂O₃: 0 to 42 portions of Cr₂O₃: 12 to 77 portions of Al₂O₃: 11 to 53 portions of SiO₂: 7-62 parts of adhesive: 0-60 parts and water: 0 to 150 parts;

(2) mixing the raw materials, adding the mixture into a ball mill, carrying out ball milling for 1-3 hours, and sieving the mixture through a 275-ion 325-mesh sieve to obtain a dried substance;

(3) pressing and molding the dried substance obtained in the step (2) under 0.01MPa-50MPa, then sintering for 1-6 hours under the atmosphere of 1000-1400 ℃, crushing, and sieving with a 200-and 325-mesh sieve to obtain coating powder;

preferably, when the water component in the step (1) is more than 0, a drying procedure is added before the step (2);

preferably, the ball milling process in the step (2) is dry ball milling or wet ball milling;

preferably, the firing atmosphere in the step (3) is an oxidizing atmosphere or a reducing atmosphere;

preferably, the coating is applied at a thickness of 0.05mm to 2.5 mm.

The invention has the following beneficial effects:

1.Fe₂O₃、MnO₂、CuO、Co₂O₃、Cr₂O₃、Al₂O₃、SiO₂the thermal shock resistance of the coating is promoted, the emissivity of the prepared infrared energy-saving material reaches up to 0.97, the prepared infrared energy-saving material has good high-temperature stability, and the emissivity has complementarity under different temperatures and wavelengths, so that the binding force between the binder and the metal matrix and the high-temperature kiln matrix is greatly improved, the coating is effectively prevented from falling off, the coating has good physical and chemical properties, and the service life of the coating is prolonged.

2.Cr₂O₃The thermal expansion coefficient is far lower than that of common transition metal oxide and Al₂O₃、SiO₂The equal phase combination can better reduce the thermal expansion coefficient of the coating to adapt to the requirements of different matrixes, greatly enhance the thermal shock resistance and overcome the stripping in the thermal cycle process.

3. The adhesive has large adhesion to the substrate, can be well adapted to other raw materials, can be firmly adhered to the surface of a metal or nonmetal substrate, greatly improves the binding force between the metal substrate and the substrate of the high-temperature kiln, and effectively avoids the coating from falling off.

Detailed Description

The present invention will be further described with reference to specific examples to assist understanding of the invention.