CN111995888B - Coating for surface source black body, surface source black body and preparation method thereof - Google Patents

Coating for surface source black body, surface source black body and preparation method thereof Download PDF

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CN111995888B
CN111995888B CN202010872080.5A CN202010872080A CN111995888B CN 111995888 B CN111995888 B CN 111995888B CN 202010872080 A CN202010872080 A CN 202010872080A CN 111995888 B CN111995888 B CN 111995888B
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black body
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CN111995888A (en
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郑东辉
陈洁
陈鸿武
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Zhejiang Dahua Technology Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21G—CONVERSION OF CHEMICAL ELEMENTS; RADIOACTIVE SOURCES
    • G21G4/00—Radioactive sources

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  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Paints Or Removers (AREA)
  • Other Surface Treatments For Metallic Materials (AREA)
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Abstract

The present application relates to blackbody materialsThe field discloses a coating for a surface source black body, the surface source black body and a preparation method thereof. The coating for the non-point source black body comprises inorganic powder, wherein the coating comprises the following raw materials in percentage by weight based on the total weight of the inorganic powder: 1 to 15 percent of MgO and Cr2O3 35％‑55％、MnO20.5-8 percent of NiO, 1-20 percent of SiC and TiO21 to 15 percent. The emissivity of the surface source black body prepared by the coating can reach over 0.98.

Description

Coating for surface source black body, surface source black body and preparation method thereof
Technical Field
The application relates to the field of blackbody materials, in particular to a coating for a surface source blackbody, the surface source blackbody and a preparation method thereof.
Background
The surface source black body is used as a standard radiation source of an infrared spectrum section and is widely applied to calibration of an infrared remote sensor and a thermal imager. With the development of infrared technology, the application of the infrared technology is more and more extensive, and the temperature range is further expanded.
The emissivity of the traditional surface source black body is generally between 0.95 and 0.97, and in order to improve the emissivity of the surface source black body, the purpose of improving the emissivity of the surface source black body can be achieved by improving the structure and the coating of the surface source black body. The method for improving the emissivity of the surface source black body by changing the structure of the surface source black body is difficult in processing technology and low in yield. In order to facilitate production and improve production yield, a method of coating a coating on the surface of a surface source black body is generally common, but after the coating is applied to the surface source black body, the emissivity of the surface source black body can be improved to about 0.93 by the existing coating for the surface source black body, so that the existing coating cannot meet the requirement of the surface source black body with higher emissivity.
Disclosure of Invention
The application discloses a coating for a surface source black body, the surface source black body and a preparation method thereof, and the emissivity of the surface source black body prepared by the coating can reach more than 0.98.
In order to achieve the purpose, the application provides the following technical scheme:
the coating for the non-point source black body comprises inorganic powder, wherein the coating comprises the following raw materials in percentage by weight based on the total weight of the inorganic powder: 1 to 15 percent of MgO and Cr2O3 35％-55％、MnO20.5-8 percent of NiO, 1-20 percent of SiC and TiO2 1％-15％。
Further, the inorganic powder comprises the following raw materials in percentage by weight based on the total weight of the inorganic powder: MgO (magnesium oxide) 3％-13％、Cr2O3 38％-50％、MnO20.8-6 percent of NiO, 1-15 percent of SiC and TiO2 1％-12％。
A method for preparing a surface source black body comprises the following steps:
and coating the coating on the surface of the substrate subjected to surface micropore treatment, and drying at the temperature of 150-220 ℃ to obtain the surface source blackbody.
Further, the temperature in the drying treatment was 150-.
Further, the surface roughness of the substrate after the micropore processing is 6-15.5 um.
Further, the surface micro-hole treatment method comprises a laser micro-machining method, an inverse buckling method or a sand blasting method.
Furthermore, the surface micropore treatment method is a sand blasting method, and the mesh number of diamonds adopted in the sand blasting treatment is 20-50 meshes.
Further, the substrate subjected to surface micropore processing is firstly subjected to oxidation treatment, and then the surface of the substrate is coated with the coating.
Further, after the substrate is subjected to oxidation treatment, the substrate is subjected to coloring treatment, and then the surface of the substrate is coated with the coating.
Further, the thickness of the coating obtained after the coating is applied is 10-70 um.
A planar blackbody is obtained according to the preparation method of the application.
Further, the emissivity of the surface source black body is greater than 0.98.
By adopting the technical scheme of the application, the beneficial effects are as follows:
the coating for the surface source black body provided by the application uses MgO and Cr in specific proportions2O3、MnO2NiO, SiC and TiO2After the coating is coated on a substrate of the surface source black body, the surface source black body with the emissivity larger than 0.98 can be obtained.
The preparation method of the non-point source black body is stable and reliable in process, high in yield, high in radiance, simple to realize, suitable for mass production and low in cost.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: in the present application, all embodiments and preferred methods mentioned herein can be combined with each other to form new solutions, if not specifically stated. In the present application, all the technical features mentioned herein as well as preferred features may be combined with each other to form new technical solutions, if not specifically stated. In the present application, percentages (%) or parts refer to percent by weight or parts by weight relative to the composition, unless otherwise specified. In the present application, the components referred to or the preferred components thereof may be combined with each other to form new embodiments, if not specifically stated. In this application, unless otherwise stated, the numerical range "a-b" represents a shorthand representation of any combination of real numbers between a and b, where a and b are both real numbers. For example, a numerical range of "6 to 22" means that all real numbers between "6 to 22" have been listed herein, and "6 to 22" is simply a shorthand representation of the combination of these values. The "ranges" disclosed herein may be in the form of lower limits and upper limits, and may be one or more lower limits and one or more upper limits, respectively. In the present application, the individual reactions or process steps may be performed sequentially or in sequence, unless otherwise indicated. Preferably, the reaction processes herein are carried out sequentially.
Unless otherwise defined, technical and scientific terms used herein have the same meaning as is familiar to those skilled in the art. In addition, any methods or materials similar or equivalent to those described herein can also be used in the present application.
In a first aspect, the present application provides a coating for a surface source black body,the inorganic powder material comprises inorganic powder material, wherein the inorganic powder material comprises the following raw materials in percentage by weight: 1 to 15 percent of MgO and Cr2O3 35％-55％、MnO20.5-8 percent of NiO, 1-20 percent of SiC and TiO2 1％-15％。
The coating for the surface source black body provided by the application uses MgO and Cr in specific proportions2O3、MnO2NiO, SiC and TiO2After the coating is coated on a substrate of the surface source black body, the surface source black body with the emissivity larger than 0.98 can be obtained.
The coating for a non-point source black body of the present application includes a certain amount of a solvent, a silicone resin, a dispersant, a leveling agent, and the like in addition to the inorganic powder. Wherein, the solvent can be 20 to 30 percent, the organic silicon resin can be 30 to 40 percent and the dispersant BYK-163 can be 0.3 to 0.6 percent based on the whole coating; the leveling agent BYK-306 can be, for example, 0.05 to 0.1 percent, and the inorganic powder can be, for example, 30 to 50 percent. The solvent may be one or more of water, absolute ethanol, isopropanol, and acetone.
In the process of preparing the coating, all raw materials are added into a dispersion machine for dispersion, wherein the speed of the dispersion machine is firstly set to be 200r/min-300r/min, the working time is 5min-10min, and then 450r/min-550r/min is set, and the working time is 20min-30 min. In addition, the paint needs to be dried at 150-200 ℃ after being sprayed with paint when in use.
Typical but non-limiting amounts of MgO in the coating are, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% by weight, based on the total weight of the inorganic powder.
In the coating, the Cr is calculated by the weight percentage of the total weight of the inorganic powder2O3Typical but non-limiting amounts are for example 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54% or 55% by weight.
In the coating, MnO is calculated by the weight percentage of the total weight of the inorganic powder2Typical but non-limiting amounts are for example 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 6%, 7% or 8% by weight.
Typical but non-limiting amounts of NiO in the coating are, for example, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 6%, 7%, or 8% by weight, based on the total weight of the inorganic powder.
Typical but non-limiting amounts of SiC in the coating are, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19% or 20% by weight, based on the total weight of the inorganic powder.
In the coating, TiO is calculated by the weight percentage of the total weight of inorganic powder2Typical but non-limiting amounts are for example 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14% or 15% by weight.
In one embodiment of the present application, the inorganic powder comprises the following raw materials in percentage by weight based on the total weight of the inorganic powder: 3% -13% of MgO and Cr2O3 38％-50％、MnO20.8-6 percent of NiO, 1-15 percent of SiC and TiO2 1％-12％。
By optimizing the component composition of the coating, the absorptivity of the coating to light and the bonding force between the coating and the substrate can be further improved.
In a second aspect, the present application provides a method for preparing a planar blackbody, including: and coating the coating of the first aspect of the application on the surface of the substrate subjected to the surface micropore treatment, and drying at 150-220 ℃ to obtain the surface source black body. Further, the temperature in the drying process may be 150-200 ℃.
The preparation method of the non-point source black body is stable and reliable in process, high in yield, high in radiance, simple to realize, suitable for mass production and low in cost.
The coating of the first aspect of the application is coated on the surface of the substrate subjected to surface micropore treatment, so that a black coating can be formed on the surface of the substrate, and meanwhile, the binding force between the black coating and the substrate can be ensured to meet the use requirement. The drying temperature used in the drying treatment may be, for example, 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 210 ℃ or 220 ℃.
In one embodiment of the present application, the surface roughness of the substrate after the micro-hole treatment is 6-15.5 um. By optimizing the surface roughness of the substrate, the emissivity of the surface source black body can be further increased, and the bonding force between the substrate and the coating can also be increased.
After the micro-hole treatment, the roughness of the substrate surface can be, for example, 6um, 7um, 8um, 9um, 10um, 11um, 12um, 13um, 14um, 15um or 15.5 um.
In one embodiment of the present application, the surface micro-porous treatment method is a sand blasting method, and the mesh number of the diamond used in the sand blasting is 20-50 meshes.
In one embodiment of the present application, the substrate having undergone surface micro-porous treatment is subjected to oxidation treatment, and then the coating material is applied on the surface of the substrate. The oxidation treatment may be, for example, anodic oxidation treatment. The bonding force between the substrate and the coating layer can be further improved by the oxidation treatment.
In one embodiment of the present application, after the substrate is oxidized, the substrate is colored, and then the surface of the substrate is coated with the coating. The coloring agent used in the coloring treatment may be, for example, ori 415AN, clariant MLW, or the like. The emissivity of a surface source black body can be further improved by using a coloring agent.
In one embodiment of the present application, the thickness of the resulting coating after application of the coating is 10-70 um. The thickness of the coating may be, for example, 10um, 20um, 30um, 40um, 50um, 60um, or 70 um.
In a third aspect, the present application provides a planar blackbody obtained by the preparation method of the second aspect of the present application. The surface source black body has the advantages of high emissivity, stable and reliable coating and long service life.
The following will explain the present application in further detail with reference to examples and comparative examples.
Example 1
The embodiment is a surface source black body, and the preparation method of the surface source black body comprises the following steps:
step S1), adopting an Al 6063 substrate, adopting 40-mesh carborundum to carry out sand blasting treatment on the surface of the substrate, and after processing, the surface roughness of the substrate is 6.5 um;
step S2) of performing oxidation treatment on the sandblasted substrate; wherein the solution used in the anodic oxidation treatment is H2SO4The concentration of the solution is 20 percent, the temperature of the solution is controlled at 25 ℃, and the current density of the anode is 1.5A/dm2The voltage in the tank is 20V, and the time is controlled to be 30 min;
step S3) of performing coloring treatment on the oxidized substrate with the colorant osye 415 AN;
step S4) carrying out paint spraying treatment on the surface of the substrate subjected to coloring treatment, and drying at 180 ℃ to obtain a plane source black body; wherein, in the paint used in the paint spraying treatment, the paint comprises the following raw materials in percentage by total amount of inorganic powder: MgO 14%, Cr2O3 50％、MnO21%, NiO 5%, SiC 15% and TiO2 15％。
Example 2
The present example is a surface black body, which is different from example 1 in that the coating in the present example comprises the following raw materials in percentage by weight of the total amount of inorganic powder: MgO 5% and Cr2O3 45％、 MnO27 percent of NiO, 7 percent of SiC and 16 percent of TiO220 percent. The rest is the same as in example 1.
Example 3
The present example is a surface black body, which is different from example 1 in that the coating in the present example comprises the following raw materials in percentage by weight of the total amount of inorganic powder: MgO 15%, Cr2O3 53％、 MnO27 percent of NiO, 7 percent of SiC and 16 percent of TiO27 percent. The rest is the same as in example 1.
Example 4
The present embodiment is a planar blackbody, and is different from embodiment 1 in that the surface roughness of the substrate after the sandblasting process is 10 um. The rest is the same as in example 1.
Example 5
The embodiment is a surface source black body, and the preparation method of the surface source black body comprises the following steps:
step S1), adopting an Al 6063 substrate, adopting 40-mesh carborundum to carry out sand blasting treatment on the surface of the substrate, and after processing, the surface roughness of the substrate is 6.5 um;
step S2) carrying out spray painting treatment on the surface of the substrate subjected to sand blasting treatment, and drying at 180 ℃ to obtain a surface source blackbody; wherein, in the paint used in the paint spraying treatment, the paint comprises the following raw materials in percentage by total amount of inorganic powder: MgO 14%, Cr2O3 50％、MnO21%, NiO 5%, SiC 15% and TiO2 15％。
Example 6
The embodiment is a surface source black body, and the preparation method of the surface source black body comprises the following steps:
step S1), adopting an Al 6063 substrate, adopting 40-mesh carborundum to carry out sand blasting treatment on the surface of the substrate, and after processing, the surface roughness of the substrate is 6.5 um;
step S2) of performing oxidation treatment on the sandblasted substrate; wherein the solution used in the anodic oxidation treatment is H2SO4The concentration of the solution is 20 percent, the temperature of the solution is controlled at 25 ℃, and the current density of the anode is 1.5A/dm2The voltage in the tank is 20V, and the time is controlled to be 30 min;
step S3) carrying out spray painting treatment on the surface of the substrate subjected to oxidation treatment, and drying at 180 ℃ to obtain a surface source black body; wherein, in the paint used in the paint spraying treatment, the paint comprises the following raw materials in percentage by total amount of inorganic powder: MgO 14%, Cr2O3 50％、MnO2 1％、NiO 5％SiC 15% and TiO2 15％。
Example 7
The embodiment is a surface source black body, and the preparation method of the surface source black body comprises the following steps:
step S1), adopting an Al 6063 substrate, adopting 40-mesh carborundum to carry out sand blasting treatment on the surface of the substrate, and after processing, the surface roughness of the substrate is 6.5 um;
step S2) of performing oxidation treatment on the sandblasted substrate; wherein the solution used in the anodic oxidation treatment is H2SO4The concentration of the solution is 20 percent, the temperature of the solution is controlled at 25 ℃, and the current density of the anode is 1.5A/dm2The voltage in the tank is 20V, and the time is controlled to be 30 min;
step S3) carrying out spray painting treatment on the surface of the substrate subjected to sand blasting treatment, and drying at 180 ℃ to obtain a surface source blackbody; wherein, in the paint used in the paint spraying treatment, the paint comprises the following raw materials in percentage by total amount of inorganic powder: MgO 10% and Cr2O3 50％、MnO25 percent of NiO, 5 percent of SiC and TiO2 15％。
Comparative example 1
The comparative example is a non-point black body, which is different from example 1 in that the coating in the example consists of the following raw materials in percentage of the total amount of inorganic powder: 95% of silicon carbide, 0.5% of ferric oxide, 0.5% of manganese dioxide and 4% of aluminum oxide. The rest is the same as in example 1.
In the coating materials used in examples 1 to 7 and comparative example 1, the components such as the solvent, the silicone resin, the dispersant, and the leveling agent and the amounts added were the same.
Emissivity tests were performed on the planar blackbodies provided in examples 1 to 7 and comparative example 1, and the test results are shown in table 1. Wherein, the instrument that the test emissivity used does: flight E60.
TABLE 1
Serial number Emissivity
Example 1 0.967
Example 2 0.97
Example 3 0.983
Example 4 0.971
Example 5 0.958
Example 6 0.963
Example 7 0.972
Comparative example 1 0.89
According to the data in table 1, by comparing examples 1 to 3 with comparative example 1, the emissivity of the area source black body is affected when the coating materials are different. The emissivity of the surface source black body prepared by the coating provided by the application is above 0.98, while the emissivity of the surface source black body prepared by the coating of the comparative example 1 is about 0.94, so that the requirements of high-precision detection equipment and calibration equipment cannot be met at present.
In addition, through comparison of the data of the embodiment 1 and the embodiment 4, when the surface roughness of the substrate is changed, the emissivity of the finally obtained surface source black body is also influenced to a certain degree.
In addition, as can be seen from the comparison of the data of example 1 and examples 5-7, the oxidation treatment and the use of the colorant also have a certain effect of improving the emissivity of the face source blackbody.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (10)

1. The surface source blackbody is characterized by comprising a substrate and a coating coated on the surface of the substrate, wherein the substrate is subjected to micropore processing, and the surface roughness of the substrate is 6-15.5 um;
the coating comprises inorganic powder, wherein the coating comprises the following raw materials in percentage by weight based on the total weight of the inorganic powder: 1 to 15 percent of MgO and Cr2O3 35％-55％、MnO20.5-8 percent of NiO, 1-20 percent of SiC and TiO21％-15％。
2. The non-point source black body according to claim 1, comprising the following raw materials in percentage by weight based on the total weight of the inorganic powder: 3% -13% of MgO and Cr2O3 38％-50％、MnO20.8-6 percent of NiO, 1-15 percent of SiC and TiO2 1％-12％。
3. The method for preparing the planar blackbody according to claim 1 or 2, comprising:
the coating material as described in claim 1 or 2 is coated on the surface of the substrate subjected to the surface micropore treatment, and after the drying treatment at 150-220 ℃, the surface source black body is obtained.
4. The production method according to claim 3, wherein the surface roughness of the substrate after the micro-porous treatment is 6 to 15.5 um.
5. The method of claim 3, wherein the surface micro-hole treatment comprises a laser micro-machining method, an inverse-buckling method, or a sand-blasting method.
6. The method for preparing the porous ceramic material according to claim 5, wherein the surface micro-porous treatment method is a sand blasting method, and the mesh number of diamond used in the sand blasting is 20-50 meshes.
7. The production method according to any one of claims 3 to 6, wherein the surface-microporous-treated substrate is subjected to an oxidation treatment and then the coating material is applied to the surface of the substrate.
8. The method according to claim 7, wherein the substrate is subjected to an oxidation treatment, and then a coloring treatment and then the coating material is applied to the surface of the substrate.
9. The production method according to any one of claims 3 to 6, wherein a thickness of a coating layer obtained after applying the coating material is 10 to 70 μm.
10. A planar blackbody obtained by the production method according to any one of claims 3 to 9.
CN202010872080.5A 2020-08-26 2020-08-26 Coating for surface source black body, surface source black body and preparation method thereof Active CN111995888B (en)

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