Coated products, their preparation methods and applications

Abstract

This application provides a coated article, its preparation method, and its application. The coated article includes a substrate and a color layer disposed on at least a portion of the surface of the substrate; the color layer includes a composite oxide of metal M and metal Cr, wherein the refractive index of the oxide of metal M is greater than 2. This coated article can achieve uniform color despite variations in film thickness, thereby ensuring a uniform and consistent surface color for structural components in its application.

Description

Technical Field

[0001] This application relates to the field of coating technology, and in particular to a coated product, its preparation method, and its application. Background Technology

[0002] Currently, in order to balance the protective and decorative properties of structural components, extend their service life, and expand their application range, surface treatment is usually required.

[0003] In the existing technology, a high- and low-refractive-index oxide superposition film system is used to perform magnetron sputtering coating on the surface of structural components.

[0004] However, in the above process, the oxide is sensitive to the coating thickness, which causes the coating on the surface of the structural component to appear in different colors due to the change in film thickness, resulting in color difference on the surface of the structural component. Summary of the Invention

[0005] This application provides coated products, their preparation methods, and applications, which can obtain coated products with uniform color under varying film thickness, thereby ensuring that the surface color of the structural components to which they are applied is uniform and consistent.

[0006] In a first aspect, embodiments of this application provide a coated article, the coated article comprising a substrate and a color layer disposed on at least a portion of the surface of the substrate;

[0007] The color layer comprises a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2.

[0008] In one possible implementation, the refractive index of the oxide of the M metal is greater than 2 and less than 3.

[0009] In one possible implementation, the extinction coefficient of the coated article is 0.31 to 2.8.

[0010] In one possible implementation, the M metal includes at least one of Ti, Zr, Nb, and Al.

[0011] In one possible implementation, the molar content of Cr atoms in the composite oxide is 10% to 26%, and the molar content of O atoms in the composite oxide is 30% to 48%.

[0012] Preferably, the molar content of Cr atoms in the composite oxide is 17% to 22%, and the molar content of O atoms in the composite oxide is 36% to 41%.

[0013] In one possible implementation, the thickness of the color layer is 50 nm to 300 nm.

[0014] In one possible implementation, the composite oxide further includes N atoms, which are doped into the bulk phase of the composite oxide.

[0015] In one possible implementation, the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide satisfies (32-37):(30-48):(10-26):(10-15).

[0016] The number of color layers is A, where A is a positive integer greater than or equal to 1.

[0017] In one possible implementation, the coated article further includes an interference layer disposed on at least a portion of the surface of the i-th color layer; wherein i is a positive integer greater than or equal to 1 and less than or equal to A.

[0018] In one possible implementation, the number of interference layers is B, where B is a positive integer greater than or equal to 1.

[0019] In one possible implementation, the thickness of the color layer is 100nm to 200nm; the thickness of the interference layer is 30nm to 50nm.

[0020] In one possible implementation, A is 2 and B is 2; in the thickness direction of the coated product, a first color layer, a first interference layer, a second color layer, and a second interference layer are sequentially disposed from the side closest to the substrate surface to the side furthest from the substrate surface.

[0021] The thickness of the first color layer is 100nm to 150nm; the thickness of the first interference layer is 30nm to 50nm; the thickness of the second color layer is 140nm to 200nm; and the thickness of the second interference layer is 30nm to 40nm.

[0022] In one possible implementation, the coated article satisfies: L max -L min <3,a max -a min <2,b max -b min <2;

[0023] Among them, L max and L min These refer to the maximum and minimum brightness values ​​of the 1st, 2nd, ..., nth regions on the surface of the coated product, respectively. max and a min These refer to the maximum and minimum values ​​of the red and green values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product; bmax and b min These refer to the maximum and minimum values ​​of the yellow and blue values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product, respectively.

[0024] In one possible implementation, an underlayer and a functional layer are disposed between the substrate and the color layer; wherein, in the thickness direction of the coated article, the underlayer, the functional layer, and the color layer are disposed sequentially from the side closer to the surface of the substrate to the side farther from the surface of the substrate.

[0025] In one possible implementation, the underlayer is a metal layer; the functional layer comprises nitrides of Cr metal and / or Ti metal.

[0026] In one possible implementation, the underlayer is a Cr layer; the functional layer is at least one of CrSiCN, CrSiN, CrN, TiN, and TiCN.

[0027] In one possible implementation, the thickness of the substrate is 100nm to 200nm; the thickness of the functional layer is 50nm to 300nm.

[0028] Secondly, embodiments of this application provide a method for preparing the coated article described in the first aspect, comprising the following steps:

[0029] A color layer is formed on at least a portion of the surface of a substrate to obtain the coated article;

[0030] The color layer comprises a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2.

[0031] In one possible implementation, a color layer is formed on at least a portion of the surface of the substrate, including:

[0032] The color layer is formed by magnetron sputtering deposition on at least a portion of the surface of the substrate using a first target and a second target, and by introducing argon and oxygen; wherein the first target provides a Cr source and the second target provides an M metal source.

[0033] In one possible implementation, the color layer is formed by magnetron sputtering deposition on at least a portion of the surface of the substrate using a first target and a second target, and by introducing argon and oxygen.

[0034] The color layer is formed by magnetron sputtering deposition on at least a portion of the surface of the substrate using the first and second targets and by introducing argon, nitrogen, and oxygen.

[0035] In one possible implementation, a color layer is formed on at least a portion of the surface of the substrate, including:

[0036] An underlayer is formed on at least a portion of the surface of the substrate;

[0037] A functional layer is formed on at least a portion of the surface of the substrate;

[0038] The color layer is formed on at least a portion of the surface of the functional layer.

[0039] In one possible implementation, the number of color layers is A, where A is a positive integer greater than or equal to 1; the method further includes:

[0040] An interference layer is formed by magnetron sputtering deposition on at least a portion of the surface of the i-th color layer using a third target and argon gas; wherein i is a positive integer greater than or equal to 1 and less than or equal to A; the number of interference layers is B layers, where B is a positive integer greater than or equal to 1; the third target is provided with at least one of Cr source, Ti source, Nb source, and Si source.

[0041] Thirdly, embodiments of this application provide an electronic product, including the coated article in the first aspect and / or various possible embodiments of the first aspect.

[0042] The coated article, its preparation method, and its application provided in this application include: a substrate and a color layer disposed on at least a portion of the surface of the substrate; the color layer includes a composite oxide of M metal and Cr metal; wherein the refractive index of the M metal oxide is greater than 2. By doping a Cr source into an M metal oxide with a refractive index greater than 2 to form a composite oxide, the sensitivity of the coated article to the film thickness can be effectively reduced, so that when the coated article is applied to the surface treatment of structural components, the overall appearance color of the structural components can be made uniform under different film thickness conditions. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] Figure 1 A schematic diagram of the film system of a coated product provided in this application;

[0045] Figure 2 This application provides a schematic diagram of a coating system for a coated product based on a multilayer interference film design.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Obviously, the described embodiments are only some embodiments of this invention, not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0048] First, let me explain the terms used in this application:

[0049] Refractive index: The ratio of the speed of light in a vacuum to the speed of light in that medium.

[0050] Extinction coefficient: refers to the ability of a material surface to absorb and reflect light, reflecting the degree of light absorption by the material surface.

[0051] In order to balance the protective and decorative properties of structural components, extend their service life, and expand their application range, surface treatment is usually required.

[0052] A high- and low-refractive-index oxide superposition film system is used to perform magnetron sputtering coating on the surface of structural components.

[0053] However, in the above methods, the oxide is sensitive to the coating thickness, which causes the coating on the surface of the structural component to appear in different colors due to the change in film thickness, resulting in color difference on the surface of the structural component.

[0054] Based on this, this application provides a coated article, which includes a substrate and a color layer disposed on at least a portion of the surface of the substrate; the color layer includes a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2.

[0055] For example, the coated article includes a substrate, which may be the material of a stainless steel watch case, a metal structural product watch case, etc. A color layer may be provided on at least a portion of the surface of the substrate, the color layer including a composite oxide of M metal and Cr metal.

[0056] Among them, the refractive index, a parameter in the optical constants of a material, reflects the material's ability to refract light. The higher the refractive index of a material, the stronger its ability to refract incident light. Therefore, when selecting metal M, it can be determined that the refractive index of the metal oxide of metal M is greater than 2.

[0057] For example, the refractive index of the metal oxide of metal M can be selected from one or any two of the following ranges: 2.1, 2.5, 2.7, 3.0, and 3.5, such as metals Ce and Ta. Cr is added to the oxide of this metal M to obtain a color layer.

[0058] Furthermore, the refractive index of the metal oxide of M metal is greater than 2, which can more effectively selectively reflect or transmit light of specific wavelengths. This selectivity can adjust the intensity and relative phase of light of different wavelengths. Thus, by utilizing the optical interference properties of the metal oxide of M metal and the light absorption properties of metal Cr, the sensitivity of the color layer to thickness can be effectively reduced, making it easier to control color difference.

[0059] Therefore, by providing a color layer on at least a portion of the surface of a substrate to obtain a coated product, the color layer comprising a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2, the coated product containing the color layer reduces the sensitivity of color to the film thickness of the coated product, and can achieve color uniformity under different film thicknesses of the coated product, thereby ensuring that the overall appearance of the applied product is uniform and consistent in color.

[0060] In one possible implementation, the refractive index of the oxide of metal M is greater than 2 and less than 3.

[0061] For example, in order to further reduce the sensitivity of color to film thickness and ensure the uniformity of color of coated products under different film thicknesses, the refractive index of the oxide of the selected M metal can be set to a range greater than 2 and less than 3.

[0062] For example, the refractive index of the oxide of metal M can be one or any two of the following: 2.4, 2.35, 2.28, 2.20, 2.11, 2.15, and 2.05.

[0063] In one possible implementation, the extinction coefficient of the coated article is 0.31 to 2.8.

[0064] For example, the extinction coefficient, a parameter in the optical constants of a material, reflects the material's ability to absorb light. That is, the larger the extinction coefficient, the stronger the ability to absorb light. In order to better utilize the optical interference properties of the oxide of metal M and the light absorption properties of metal Cr, the extinction coefficient of the resulting coated product can be determined to be in the range of 0.31 to 2.8 by adjusting the content of each element component in the color layer.

[0065] For example, the extinction coefficient of the resulting coated product can be one or any combination of two of the following: 0.31, 1.0, 1.5, 2.0, 2.5, and 2.8. Furthermore, by employing a suitable extinction coefficient, the color layer of the coated product can have good light absorption capabilities, effectively reducing the sensitivity of the color layer to the thickness of the coated product and facilitating the control of color differences on the surface of the coated product.

[0066] In one possible implementation, the M metal includes at least one of Ti, Zr, Nb, and Al.

[0067] For example, since the optical constants of different metals are different, their corresponding optical properties are also different. Therefore, the M metal may include at least one of Ti, Zr, Nb and Al.

[0068] Furthermore, by selecting a suitable oxide of M metal for Cr source doping treatment, the resulting color layer can possess excellent comprehensive optical properties, thereby reducing the sensitivity of the color layer of the coated product to the thickness of the coated product and facilitating the control of color difference.

[0069] For example, the refractive index n of TiO2 折 The extinction coefficient k of TiO2 is 0, which is 2.35; the refractive index n of Cr is 0. 折 The extinction coefficient k of Cr is 4.41, which is 3.18. The optical material TiO2 is doped with metallic Cr.

[0070] Table 1 below shows the n values ​​corresponding to different molar contents of Cr atoms in CrTiO2 within the color layer. 折 k value.

[0071] Table 1

[0072]

[0073] By controlling the molar content of Cr atoms in the functional layer TiCrO2 to be between 5% and 50%, a color layer with obvious and uniform color effect can be obtained, further ensuring the uniform surface color of complex structural parts of products coated with this color layer.

[0074] In one possible implementation, the molar content of Cr atoms in the composite oxide is 10% to 26%, and the molar content of O atoms in the composite oxide is 30% to 48%.

[0075] Preferably, the molar content of Cr atoms in the composite oxide is 17% to 22%, and the molar content of O atoms in the composite oxide is 36% to 41%.

[0076] For example, the color layer contains O atoms and Cr atoms. Since O atoms and Cr atoms have certain optical material constants, the molar content of O atoms and the molar content of Cr atoms in the color layer affect the color effect of the color layer. The molar content of Cr atoms in the composite oxide can be set to 10% to 26%, for example, it can be one or any two of 10%, 15%, 20%, 22%, and 26%. The molar content of O atoms in the composite oxide can be 30% to 48%, for example, it can be one or any two of 30%, 35%, 40%, 42%, and 48%.

[0077] Preferably, in order to further reduce the excessive sensitivity of the color layer to changes in film thickness and to form a uniform color layer on complex-shaped structural parts, the molar content of Cr atoms in the composite oxide can be controlled to be 17% to 22%, for example, it can be one of 17%, 18%, 19%, 20%, 21%, 22% or any combination thereof; the molar content of O atoms in the composite oxide can be 36% to 41%, for example, it can be one of 36%, 37%, 38%, 39%, 40%, 41% or any combination thereof, which can obtain a color layer with obvious and uniform color effect, further ensuring the uniform color of the surface of the complex-shaped structural parts.

[0078] In one possible implementation, the thickness of the color layer is 50 nm to 300 nm.

[0079] For example, in order to ensure that the thickness of each film layer on the substrate surface does not affect the surface color of the product and the adhesion of the coating to the substrate, the film thickness of the color layer can be controlled to be 50nm to 300nm. For example, the film thickness of the color layer is one of 50nm, 100nm, 150nm, 200nm, 250nm, 300nm or any combination thereof.

[0080] In one possible implementation, the composite oxide also includes N atoms, which are doped into the bulk phase of the composite oxide.

[0081] For example, nitrogen atoms can also be incorporated into the composite oxide of the color layer, i.e., nitrogen atoms can be doped into the bulk phase of the composite oxide. For instance, TiCrO2 can be doped with Cr and N sources to obtain a TiCrNO2 composite material, forming a color layer. By doping with nitrogen, the band gap in the composite oxide can be changed, thereby affecting the ability of the color layer to absorb and emit light, resulting in color changes or enhanced luminous efficiency, and improving the color rendering effect of the coated product.

[0082] In one possible implementation, the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide satisfies (32-37):(30-48):(10-26):(10-15).

[0083] For example, after doping N atoms into the composite oxide, the composite oxide contains M atoms, O atoms, Cr atoms and N atoms. In order to achieve both uniform color of the color layer of the coated product and improve the color rendering effect, the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide can be made to satisfy (32~37):(30~48):(10~26):(10~15).

[0084] For example, the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide satisfies one of (32:30:10:10), (35:40:15:13), (36:45:20:14), (37:48:26:15) or any combination thereof.

[0085] In one possible implementation, the number of color layers is A, where A is a positive integer greater than or equal to 1.

[0086] For example, the coated product may adopt a multi-layer design, that is, the number of color layers in the coated product is A layers, where A is a positive integer greater than or equal to 1.

[0087] In one possible implementation, the coated article further includes an interference layer disposed on at least a portion of the surface of the i-th color layer; wherein i is a positive integer greater than or equal to 1 and less than or equal to A.

[0088] For example, the coated product may adopt an interference film layer design, that is, the coated product further includes an interference layer, which is disposed on at least a portion of the surface of the i-th color layer away from the substrate. For example, an interference layer is disposed on at least a portion of the surface of the first color layer away from the substrate to further stabilize the color rendering effect of the color layer and ensure that the surface color effect of the applied complex-shaped structural product is obvious and uniform.

[0089] In one possible implementation, the interference layer includes at least one of Cr, Ti, Nb, and Si.

[0090] For example, the interference layer includes at least one of Cr, Ti, Nb, and Si, such as a Cr layer, a Ti layer, an Nb layer, or a Si layer. The presence of Cr typically does not significantly alter the color, but it can form a thin film, improving the corrosion resistance of the coated product. Ti typically does not significantly alter the color of the material, but it can affect the gloss and reflective properties of the coated product, thereby improving the color rendering effect. Nb and Si, without affecting the color effect, can improve the strength and corrosion resistance of the coated product.

[0091] In one possible implementation, the number of interference layers is B, where B is a positive integer greater than or equal to 1.

[0092] For example, the coated product may adopt a multi-interference film layer design, that is, the number of interference layers in the coated product is B layers, where B is a positive integer greater than or equal to 1.

[0093] For example, an interference layer or multiple interference layers can be disposed on at least a portion of the surface of each color layer away from the substrate; or after disposing of one or more interference layers on one or more color layers, another interference layer or multiple color layers can be superimposed on the outermost interference layer away from the substrate.

[0094] In one possible implementation, the thickness of the color layer is 100nm to 200nm; the thickness of the interference layer is 30nm to 50nm. For example, when a coated product employs a multi-interference film layer design, in order to ensure that the thickness of the color layer and the interference layer on the substrate surface does not affect the surface color of the product and the adhesion of the coating to the substrate, the thickness of each color layer in the coated product can be controlled to be 100nm to 200nm.

[0095] For example, it can be a range of 100nm, 120nm, 140nm, 160nm, 200nm or any combination thereof; the thickness of each interference layer in the coated product can be 30nm to 50nm, for example, it can be a range of 30nm, 35nm, 150nm, 40nm, 45nm, 50nm or any combination thereof.

[0096] In one possible implementation, A is 2 and B is 2; in the thickness direction of the coated product, the first color layer, the first interference layer, the second color layer, and the second interference layer are sequentially disposed from the side closest to the substrate surface to the side furthest from the substrate surface.

[0097] The thickness of the first color layer is 100nm to 150nm; the thickness of the first interference layer is 30nm to 50nm; the thickness of the second color layer is 140nm to 200nm; and the thickness of the second interference layer is 30nm to 40nm.

[0098] For example, when the coated product adopts a multi-interference film layer design, when the value of A is 2 and the value of B is 2, the coated product includes 2 color layers and 2 interference layers. The first color layer is set on the surface of the substrate, the first interference layer is set on the side of the first color layer that is close to the side away from the substrate surface, the second color layer is set on the side of the first interference layer that is close to the side away from the substrate surface, and the second interference layer is set on the side of the second color layer that is close to the side away from the substrate surface.

[0099] To ensure the uniformity of the surface color of the coated product and other properties such as crack resistance and strength, the thickness of the first color layer can be controlled to be 100nm to 150nm; the thickness of the first interference layer can be 30nm to 50nm; the thickness of the second color layer can be 140nm to 200nm; and the thickness of the second interference layer can be 30nm to 40nm.

[0100] For example, the thickness of the first color layer is in the range of 100nm, 110nm, 120nm, 130nm, 140nm, 150nm or any combination thereof; the thickness of the first interference layer is in the range of 30nm, 35nm, 40nm, 45nm, 50nm or any combination thereof; the thickness of the second color layer is in the range of 140nm, 150nm, 160nm, 170nm, 180nm, 190nm, 200nm or any combination thereof; the thickness of the second interference layer is in the range of 30nm, 32nm, 34nm, 36nm, 38nm, 40nm or any combination thereof.

[0101] In one possible implementation, the coated article satisfies: L max -L min <3,a max -a min <2,b max -b min <2.

[0102] Among them, L max and L min These refer to the maximum and minimum brightness values ​​of the 1st, 2nd, ..., nth regions on the surface of the coated product, respectively. max and a min These refer to the maximum and minimum values ​​of red and green values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product; b max and b min These refer to the maximum and minimum values ​​of the yellow and blue values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product.

[0103] For example, to further reduce the sensitivity of the color of the coated product to changes in its film thickness, and to form a uniformly colored film layer on a complex-shaped structure, n regions can be defined on the surface of the coated product, including the 1st, 2nd, ..., nth regions. By testing the Lab color value of the coated product, where L represents luminance (equivalent to brightness), a represents the range from red to green, and b represents the range from blue to yellow, the brightness value L, the red-green value a, and the yellow-blue value b in the 1st, 2nd, ..., nth regions can be determined respectively. Furthermore, the maximum brightness value L in the 1st, 2nd, ..., nth regions on the surface of the coated product can be determined. max and minimum value L min Furthermore, the maximum value 'a' of the red-green value in the 1st, 2nd, ..., nth regions on the surface of the coated product was determined. max and minimum value a min Furthermore, the maximum value b of the yellow-blue value in the 1st, 2nd, ... nth regions on the surface of the coated product was determined. max and minimum value b min Furthermore, the coated product is controlled to meet the following condition: L max -L min <3,a max -a min <2,b max -b min <2, so that the final coated product has a uniform color development effect.

[0104] In one possible implementation, an underlayer and a functional layer are disposed between the substrate and the color layer; wherein, in the thickness direction of the coated article, the underlayer, the functional layer, and the color layer are disposed sequentially from the side closer to the substrate surface to the side farther away from the substrate surface.

[0105] For example, the coated article further includes an underlayer and a functional layer disposed between the substrate and the color layer. Specifically, in the thickness direction of the coated article, the underlayer is disposed on the side closer to the substrate surface, the functional layer is disposed on the side of the underlayer away from the substrate surface, and the color layer is disposed on the side of the functional layer away from the substrate surface.

[0106] The undercoat layer is used to improve the adhesion between the color layer and the substrate in the coated product, while the functional layer can improve the corrosion resistance and wear resistance of the coated product.

[0107] For example, Figure 1 This is a schematic diagram of the film system of a coated product provided in this application, as shown below. Figure 1 As shown, the coated product includes a substrate and an underlayer and a functional layer disposed sequentially from the inside to the outside on the surface of the substrate, and also includes a color layer disposed on the surface of the functional layer.

[0108] For example, Figure 2 A schematic diagram of a coating system for a coated product based on a multilayer interference film design is provided for this application, as shown below. Figure 2 As shown, the coated product includes a substrate and an underlayer and a functional layer sequentially disposed from the inside out on the surface of the substrate. It also includes two color layers and two interference layers disposed on the surface of the functional layers. The first color layer is disposed on the surface of the functional layers, the first interference layer is disposed on the surface of the first color layer, the second color layer is disposed on the surface of the first interference layer, and the second interference layer is disposed on the surface of the second color layer. In addition, embodiments of this application can also consider coated product designs based on four, six, or more layers of interference film systems.

[0109] In one possible implementation, the underlayer is a metal layer; the functional layer comprises nitrides of Cr metal and / or Ti metal.

[0110] In one possible implementation, the base layer is a Cr layer; the functional layer is at least one of CrSiCN, CrSiN, CrN, TiN and TiCN.

[0111] For example, in order to further improve the adhesion between the color layer and the substrate in the coated product, and to further improve the corrosion resistance and wear resistance of the coated product, the underlayer can be a metal layer, including nitrides of Cr metal and / or Ti metal.

[0112] Specifically, the bottom layer is a Cr layer; the functional layer is at least one of CrSiCN, CrSiN, CrN, TiN and TiCN.

[0113] In one possible implementation, the thickness of the underlayer is 100nm to 200nm; the thickness of the functional layer is 50nm to 300nm.

[0114] For example, in order to further ensure that the thickness of each film layer on the substrate surface does not affect the surface color of the product and the adhesion of the coating to the substrate, the thickness of the underlayer film can be controlled to be 100nm to 200nm. For example, the thickness of the underlayer film is one of 100nm, 120nm, 140nm, 120nm, 180nm, 200nm or any combination thereof; the thickness of the functional layer in the coated product is 50nm to 300nm. For example, the thickness of the functional layer can be one of 50nm, 100nm, 140nm, 220nm, 280nm, 300nm or any combination thereof.

[0115] This application also provides a method for preparing the coated product in the foregoing embodiments, comprising the following steps:

[0116] A color layer is formed on at least a portion of the surface of a substrate to obtain a coated article.

[0117] The color layer comprises a composite oxide of M metal and Cr metal, with the oxide of M metal having a refractive index greater than 2.

[0118] For example, by means of coating technology, a metal M with a refractive index greater than 2 is selected, and a composite oxide of the metal M and Cr is formed on the surface of the substrate to form a color layer to obtain a coated product.

[0119] Therefore, by using a composite oxide of M metal and Cr metal and applying the above preparation method to coat the substrate surface to form a coated product, the surface color of the coated product is obvious and uniform, which is beneficial for the surface of complex-shaped structural parts to have a uniform color effect.

[0120] In one possible implementation, forming an underlayer on the substrate surface includes: using a Cr target to provide a Cr source and introducing argon gas, and performing magnetron sputtering deposition on the substrate surface to form the underlayer.

[0121] For example, a Cr target is used to provide a Cr source and argon gas is introduced. Magnetron sputtering deposition is achieved by bombarding the Cr target with high-purity argon gas, so that an underlayer is formed on the surface of the substrate, wherein the thickness of the underlayer is 100nm to 200nm.

[0122] In one possible implementation, forming a functional layer on the substrate surface includes: using a Cr target and an M target and introducing argon gas, and performing magnetron sputtering deposition on the substrate surface to form the functional layer; wherein the M target includes an oxide of M metal.

[0123] For example, a Cr target and an M target including an oxide of M metal are used and argon gas is introduced. The argon gas bombards the Cr target and the M target, and the sputtered Cr and M react to form a composite material that is deposited on the surface of the substrate to form a functional layer.

[0124] For example, high-purity argon and high-purity nitrogen are introduced. The argon bombards the Cr and TiO2 targets, and the sputtered Cr and TiO2 react to form TiCrO2, which is deposited on the surface of the substrate to form a functional layer with a film thickness of 50nm to 300nm.

[0125] In one possible implementation, forming a color layer on at least a portion of the surface of a substrate includes: using a first target and a second target and introducing argon and oxygen, performing magnetron sputtering deposition on at least a portion of the surface of the substrate to form the color layer; wherein the first target provides a Cr source; and the second target provides an M metal source.

[0126] For example, in the specific formation process of the color layer, a first target can be used to provide a Cr source, and an M target can be used to provide an M source. Argon and oxygen are introduced to bombard the Cr target and the M target to achieve magnetron sputtering deposition, thereby forming a composite oxide on the substrate surface to form a color layer.

[0127] In one possible implementation, a color layer is formed by magnetron sputtering deposition on at least a portion of the surface of a substrate using a first target and a second target and introducing argon and oxygen.

[0128] For example, in the specific formation process of the color layer, Cr and M targets can be used to provide Cr and M sources, and argon, nitrogen source gas and oxygen are introduced to bombard the Cr and M targets to achieve magnetron sputtering deposition, so as to form a N-doped composite oxide on the substrate surface to form the color layer.

[0129] In one possible implementation, forming a color layer on at least a portion of the surface of the substrate includes forming an underlayer on the surface of the substrate.

[0130] A functional layer is formed on the surface of the base layer.

[0131] A color layer is formed on at least a portion of the surface of the functional layer.

[0132] For example, by means of coating technology, a Cr metal material can be used to form a Cr layer as a base layer on the surface of a substrate; then, based on the coating technology, at least one of CrSiCN, CrSiN, CrN, TiN and TiCN is used to form a functional layer on the surface of the base layer; a composite oxide obtained by doping a Cr source with an oxide of M metal is used to form a color layer on the surface of the functional layer to obtain a coated product.

[0133] Therefore, by using the above preparation method, a coating process of base layer, functional layer and color layer is performed on the surface of the substrate to form a coated product, so that the surface color effect of the coated product is obvious and uniform, which is beneficial for the surface of complex-shaped structural parts to have a uniform color effect.

[0134] In one possible implementation, the number of color layers is A, where A is a positive integer greater than or equal to 1; it also includes:

[0135] An interference layer is formed by magnetron sputtering deposition on at least a portion of the surface of the i-th color layer using a third target and argon gas; wherein i is a positive integer greater than or equal to 1 and less than or equal to A; the number of interference layers is B layers, where B is a positive integer greater than or equal to 1; the third target is provided with at least one of Cr source, Ti source, Nb source, and Si source.

[0136] For example, during the formation of color layer A, where A is a positive integer greater than or equal to 1, after the formation of color layer i, a third target material can be used to provide at least one of Cr source, Ti source, Nb source, and Si source, and argon, nitrogen source gas, and oxygen are introduced to bombard the third target material to achieve magnetron sputtering deposition, thereby forming one or more interference layers on the surface of color layer i, where i is a positive integer greater than or equal to 1 and less than or equal to A; the number of interference layers is B, where B is a positive integer greater than or equal to 1.

[0137] For example, when M is Ti and X is Cr, high-purity argon, high-purity nitrogen, and oxygen are introduced. Argon bombards the Cr and Ti targets, and the sputtered Cr and Ti react with nitrogen and oxygen to form TiCrNO2, which is deposited on the surface of the functional layer. By adjusting the power of the Cr target power supply, the molar content of Cr in the formed composite material TiCrNO2 can be controlled. By adjusting the flow rate of the reacting gas oxygen, the molar content of O in TiCrNO2 can be controlled, resulting in a first color layer with a thickness of 100nm to 150nm. Through Cr target deposition, a first interference layer with a thickness of 30nm to 50nm is obtained. By adjusting the power of the Cr target power supply, the molar content of Cr in TiCrNO2 can be controlled. By adjusting the flow rate of the reacting gas oxygen, the molar content of O in TiCrNO2 can be controlled, resulting in a second color layer with a thickness of 140nm to 200nm. Through Cr target deposition, a second interference layer with a thickness of 30nm to 40nm is obtained.

[0138] This invention also provides an electronic product whose surface includes the coated article described in the foregoing embodiments. This electronic product has advantages corresponding to the aforementioned coated articles, namely, by forming a color layer in the coated article using a composite oxide of M and Cr metals, the sensitivity of the coated article to film thickness can be effectively reduced. Furthermore, when this coated article is applied to structural components of electronic products, the coated article containing this optical composite material can achieve a uniform overall color appearance of the structural component under different film thickness conditions.

[0139] The present invention will be described in detail below through embodiments.

[0140] Unless otherwise specified in the following examples and comparative examples, all conditions were performed under standard conditions or conditions recommended by the manufacturer. Reagents or instruments used, unless otherwise specified, are all commercially available products.

[0141] Example 1

[0142] This embodiment illustrates the preparation of coated products.

[0143] In this embodiment, a three-dimensional structural component of a titanium alloy watch case is plated with blue. The vacuum magnetron sputtering coating process is as follows:

[0144] Step 1: Place the workpiece on the fixture of the sputtering machine and evacuate it; fill the furnace chamber with argon gas, open the rotating frame, and after the gas stabilizes, turn on the ion source to perform ion cleaning on the workpiece surface and the target surface. The ion source ICP power is 0.5 kW to 5 kW; the vacuum degree is 1 × 10⁻⁶. -3 Pa ~ 10 × 10 -3 Pa, time is 5min to 60min.

[0145] Step 2: With argon gas continuously supplied, turn on the sputtering power supply of the Cr target material at a power of 5kw to 15kw to deposit the bottom layer Cr film on the workpiece surface at a coating working pressure of 0.07Pa to 1Pa.

[0146] Step 3: Supply argon and nitrogen gas, keep the Cr target on, and simultaneously turn on the M target. The sputtering power of the Cr target is 10kw to 15kw, and the sputtering power of the M target is 10kw to 25kw. Deposit a functional layer on the Cr surface of the base layer. The coating working pressure is 0.07Pa to 1Pa.

[0147] Step 4: Argon, nitrogen, and oxygen are supplied to keep the Cr and M targets on. The Cr sputtering power supply is 5kw to 10kw, and the M target sputtering power supply is 10kw to 25kw. A composite oxide is deposited on the surface of the functional layer, which is the color layer. The coating working pressure is 0.07Pa to 1Pa.

[0148] Step 5: After the deposition process is completed, turn off the target power supply, turn off the ion source power supply, stop the gas supply, stop the rotation of the rotating frame, close the gas path, seal the working chamber, and wait for the workpiece to cool down before taking it out; where M is Ti; the refractive index of Ti metal oxide is 2.11, the extinction coefficient of the obtained coating product is 0.65, and the molar ratio of M atoms, O atoms, Cr atoms, and N atoms in the composite oxide is 59:30:11:0, that is, the molar content of Cr atoms in the composite oxide is 11%, and the molar content of O atoms in the composite oxide is 30%; the thickness of the color layer is 123.6 nm, as shown in Table 2.

[0149] Example 2

[0150] The preparation method of the coated product in Example 2 is basically the same as that in Example 1. The difference from Example 1 is that the refractive index of the oxide of metal M is 2.09, the extinction coefficient of the obtained coated product is 1.12, and the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 26:48:26:0, that is, the molar content of Cr atoms in the composite oxide is 26% and the molar content of O atoms in the composite oxide is 48%. The thickness of the first color layer is 115.4 nm, as shown in Table 2.

[0151] Example 3

[0152] The preparation method of the coated product in Example 3 is basically the same as that in Example 1. The difference from Example 1 is that the refractive index of the oxide of metal M is 2.15, the extinction coefficient of the obtained coated product is 1.06, and the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 47:36:17:0, that is, the molar content of Cr atoms in the composite oxide is 17% and the molar content of O atoms in the composite oxide is 36%; the thickness of the first color layer is 120.6 nm, as shown in Table 2.

[0153] Example 4

[0154] The preparation method of the coated product in Example 4 is basically the same as that in Example 1. The difference from Example 1 is that the refractive index of the oxide of metal M is 2.23, the extinction coefficient of the resulting coated product is 1.09, and the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 37:41:22:0, that is, the molar content of Cr atoms in the composite oxide is 22% and the molar content of O atoms in the composite oxide is 41%. The thickness of the first color layer is 106.5 nm, as shown in Table 2.

[0155] Example 5

[0156] The preparation method of the coated product in Example 5 is basically the same as that in Example 1. The difference from Example 1 is that in step 4, argon, nitrogen and oxygen are supplied, the Cr and M targets are kept on, the Cr sputtering power is 5 kW to 10 kW, the M target sputtering power is 10 kW to 25 kW, and the composite oxide TiCrNO2 is deposited on the surface of the functional layer to obtain the color layer. The coating working pressure is 0.07 Pa to 1 Pa. In addition, the difference from Example 1 is that the refractive index of the M metal oxide is 2.12, the extinction coefficient of the obtained coated product is 0.67, and the molar content ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 28:41:19:12, that is, the molar content of Cr atoms in the composite oxide is 19% and the molar content of O atoms in the composite oxide is 41%. The thickness of the first color layer is 114.6 nm, as shown in Table 2.

[0157] Example 6

[0158] The preparation method of the coated product in Example 6 is basically the same as that in Example 1. The difference from Example 1 is that in step 4, argon, nitrogen and oxygen are supplied, the Cr and M targets are kept on, the power of the Cr sputtering power supply is 5 kW to 10 kW, the power of the M target sputtering power supply is 10 kW to 25 kW, and the composite oxide TiCrNO2 is deposited on the surface of the functional layer to obtain the color layer. The coating working pressure is 0.07 Pa to 1 Pa. In addition, the difference from Example 1 is that the refractive index of the M metal oxide is 2.1, the extinction coefficient of the obtained coated product is 1.14, and the molar content ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 22:48:19:11, that is, the molar content of Cr atoms in the composite oxide is 19% and the molar content of O atoms in the composite oxide is 48%. The thickness of the color layer is 136.4 nm, as shown in Table 2.

[0159] Example 7

[0160] The preparation method of the coated product in Example 7 is basically the same as that in Example 1. The difference from Example 1 is that in step 4, argon, nitrogen and oxygen are supplied, the Cr and M targets are kept on, the power of the Cr sputtering power supply is 5 kW to 10 kW, the power of the M target sputtering power supply is 10 kW to 25 kW, and the composite oxide TiCrNO2 is deposited on the surface of the functional layer to obtain the color layer. The coating working pressure is 0.07 Pa to 1 Pa. In addition, the difference from Example 1 is that the refractive index of the M metal oxide is 2.17, the extinction coefficient of the obtained coated product is 1.07, and the molar content ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 24:41:26:9, that is, the molar content of Cr atoms in the composite oxide is 26% and the molar content of O atoms in the composite oxide is 41%. The thickness of the color layer is 122.9 nm, as shown in Table 2.

[0161] Example 8

[0162] The preparation method of the coated product in Example 8 is basically the same as that in Example 1. The difference from Example 1 is that in step 4, argon, nitrogen, and oxygen are supplied, and the Cr and M targets are kept on. The Cr sputtering power supply power is 5 kW to 10 kW, and the M target sputtering power supply power is 10 kW to 25 kW. The first color layer TiCrNO2 is deposited on the surface of the functional layer, and the coating working pressure is 0.07 Pa to 1 Pa. In step 5, argon, nitrogen, and oxygen are supplied, and the Cr and M targets are kept on. The Cr sputtering power supply power is 5 kW to 10 kW, and the M target sputtering power supply power is 10 kW to 25 kW. The second color layer is deposited on the first color layer TiCrNO2. The TiCrNO2 layer is coated under a working pressure of 0.07 Pa to 1 Pa. Step 6 is the same as step 5 in Example 1. However, the difference from Example 1 is that the refractive index of the M metal oxide is 2.25, the extinction coefficient of the resulting coated product is 1.11, and the molar ratio of M atoms, O atoms, Cr atoms, and N atoms in the composite oxide is 21:58:13:8, that is, the molar content of Cr atoms in the composite oxide is 13%, and the molar content of O atoms in the composite oxide is 58%. The thickness of the first color layer is 116.7 nm, and the thickness of the second color layer is 151.3 nm, as shown in Table 2.

[0163] Example 9

[0164] The preparation method of the coated product in Example 9 is basically the same as that in Example 1. The difference from Example 1 is that in step 4, argon, nitrogen, and oxygen are supplied, and the Cr and M targets are kept on. The Cr sputtering power supply power is 5 kW to 10 kW, and the M target sputtering power supply power is 10 kW to 25 kW. The first color layer TiCrNO2 is deposited on the surface of the functional layer, and the coating working pressure is 0.07 Pa to 1 Pa. In step 5, argon is continuously supplied, and the sputtering power supply of the Cr target is turned on with a power of 5 kW to 15 kW. The first interference layer Cr film is deposited on the surface of the first color layer TiCrNO2, and the coating working pressure is 0.07 Pa to 1 Pa. In step 6, argon, nitrogen, and oxygen are supplied, and the Cr and M targets are kept on. The Cr sputtering power supply power is 5 kW to 10 kW, and the M target sputtering power supply power is 10 kW to 25 kW. The second color layer TiCrNO2 is deposited on the surface of the first interference layer Cr film. 2. The coating working pressure is 0.07 Pa to 1 Pa; Step 7: The argon gas source is continuously supplied, and the sputtering power supply of the Cr target is turned on with a power of 5 kW to 15 kW. The second interference layer Cr film is deposited on the surface of the second color layer TiCrNO2. The coating working pressure is 0.07 Pa to 1 Pa; Furthermore, the difference from Example 1 is that the refractive index of the M metal oxide is 2.15, the extinction coefficient of the obtained coating product is 1.15, and the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 56:22:15:7, that is, the molar content of Cr atoms in the composite oxide is 15%, and the molar content of O atoms in the composite oxide is 22%; the thickness of the first color layer is 105.2 nm, the thickness of the second color layer is 162.1 nm, the thickness of the first interference layer is 42 nm, and the thickness of the second interference layer is 35 nm, as shown in Table 2.

[0165] Comparative Example 1: The preparation method of the coated product in Comparative Example 1 is basically the same as that in Example 1. The difference is that in step 2, argon, nitrogen, and oxygen are supplied, the M target is turned on, the M target sputtering power is 10 kW to 25 kW, and a composite oxide is deposited on the surface of the workpiece to obtain a color layer. The coating working pressure is 0.07 Pa to 1 Pa. In step 3, after the deposition process is completed, the target power supply is turned off, the ion source power supply is turned off, the gas supply is stopped, the rotating frame is stopped, the gas path is closed, the working chamber is sealed, and the workpiece is taken out after cooling down to end the preparation. The process; and, the difference from Example 1 is that the M metal is Ti, but the composite oxide in the color layer does not include Cr atoms, the refractive index of the M metal oxide is 2.35, the extinction coefficient of the resulting coated product is 0, the molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide is 32:49:0:19, that is, the molar content of Cr atoms in the composite oxide is 0%, and the molar content of O atoms in the composite oxide is 49%; the thickness of the first color layer is 122.9 nm, as shown in Table 2.

[0166] Comparative Example 2: The preparation method of the coated product of Comparative Example 2 is basically the same as that of Example 1. The difference from Example 1 is that M is Si, the refractive index of the oxide of M is 1.56, and the extinction coefficient of the obtained coated product is 0; the thickness of the first color layer is 134.5 nm, as shown in Table 2.

[0167] The performance of the coated workpieces of each embodiment and comparative example was tested through the following process, and the results are shown in Tables 2 and 3.

[0168] Color value and film thickness testing

[0169] Using a colorimeter, the luminance value (L), red-green value (a), and yellow-blue value (b) of the Lab color values ​​were measured in three areas on the surface of the coated workpiece: the long side, the short side, and the lug area. The maximum value (L) was then determined. max a max b max With minimum value L min a min b min And calculate the differences in the average color values ​​of all regions, ∆L, ∆a, and ∆b, where L represents illuminance (equivalent to brightness), a represents the range from red to green, and b represents the range from blue to yellow.

[0170] After coating, samples are cut and mounted on various areas of the workpiece surface. The film thickness corresponding to the color value of each area is measured using a scanning electron microscope, and the correspondence between the color value and the film thickness difference is recorded.

[0171] Table 2

[0172]

[0173] Table 3

[0174]

[0175] The following conclusions can be drawn from Tables 2 and 3:

[0176] 1) Compared with Comparative Examples 1 and 2, in the coated products obtained in Examples 1 to 9, a composite oxide including Ti metal and Cr metal is used in the color layer of at least part of the surface of the substrate. When the refractive index of the Ti metal oxide is greater than 2, the color difference on the surface of the coated product can be reduced, thereby reducing the sensitivity of the color of the coated product to the thickness of the film layer. This achieves the effect of uniform and consistent overall appearance color of the product using the coated product under different film thickness conditions.

[0177] 2) Compared with Examples 1 to 8, the coated product obtained in Example 9 adopts a multi-interference film layer design, that is, a first color layer is set on the surface of the substrate, a first interference layer is set on the side of the first color layer that is close to the surface away from the substrate, a second color layer is set on the side of the first interference layer that is close to the surface away from the substrate, and a second interference layer is set on the side of the second color layer that is close to the surface away from the substrate. This can further reduce the color difference on the surface of the coated product and help to further improve the uniformity of the color on the surface of the coated product.

[0178] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coated product, characterized in that, The coated product includes a substrate and a color layer disposed on at least a portion of the surface of the substrate; The color layer comprises a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2.

2. The coated product according to claim 1, characterized in that, The refractive index of the oxide of the metal M is greater than 2 and less than 3.

3. The coated product according to claim 1 or 2, characterized in that, The extinction coefficient of the coated product is 0.31 to 2.

8.

4. The coated article according to any one of claims 1-3, characterized in that, The M metal includes at least one of Ti, Zr, Nb, and Al.

5. The coated article according to any one of claims 1-4, characterized in that, The composite oxide contains 10% to 26% Cr atoms and 30% to 48% O atoms. Preferably, the molar content of Cr atoms in the composite oxide is 17% to 22%, and the molar content of O atoms in the composite oxide is 36% to 41%.

6. The coated article according to any one of claims 1-5, characterized in that, The thickness of the color layer is 50nm to 300nm.

7. The coated article according to any one of claims 1-6, characterized in that, The composite oxide also includes N atoms, which are doped into the bulk phase of the composite oxide.

8. The coated article according to claim 7, characterized in that, The molar ratio of M atoms, O atoms, Cr atoms and N atoms in the composite oxide satisfies (32-37):(30-48):(10-26):(10-15).

9. The coated article according to any one of claims 1-8, characterized in that, The number of color layers is A, where A is a positive integer greater than or equal to 1.

10. The coated article according to claim 9, characterized in that, The coated product further includes an interference layer, which is disposed on at least a portion of the surface of the i-th color layer; wherein i is a positive integer greater than or equal to 1 and less than or equal to A.

11. The coated article according to claim 10, characterized in that, The interference layer includes at least one of Cr, Ti, Nb and Si.

12. The coated article according to claim 10 or 11, characterized in that, The interference layer has B layers, where B is a positive integer greater than or equal to 1.

13. The coated article according to any one of claims 10-12, characterized in that, The thickness of the color layer is 100nm to 200nm; the thickness of the interference layer is 30nm to 50nm.

14. The coated article according to claim 12, characterized in that, The value of A is 2, and the value of B is 2; in the thickness direction of the coated product, the first color layer, the first interference layer, the second color layer, and the second interference layer are sequentially arranged from the side close to the surface of the substrate to the side away from the surface of the substrate. The thickness of the first color layer is 100nm to 150nm; the thickness of the first interference layer is 30nm to 50nm; the thickness of the second color layer is 140nm to 200nm; and the thickness of the second interference layer is 30nm to 40nm.

15. The coated article according to any one of claims 1-14, characterized in that, The coated product satisfies: L max -L min <3,a max -a min <2,b max -b min <2; Among them, L max and L min These refer to the maximum and minimum brightness values ​​of the 1st, 2nd, ..., nth regions on the surface of the coated product, respectively. max and a min These refer to the maximum and minimum values ​​of the red and green values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product; b max and b min These refer to the maximum and minimum values ​​of the yellow and blue values ​​in the 1st, 2nd, ..., nth regions on the surface of the coated product, respectively.

16. The coated article according to any one of claims 1-15, characterized in that, An underlayer and a functional layer are disposed between the substrate and the color layer; wherein, in the thickness direction of the coated article, the underlayer, the functional layer, and the color layer are disposed sequentially from the side closer to the surface of the substrate to the side farther away from the surface of the substrate.

17. The coated article according to claim 16, characterized in that, The underlayer is a metal layer; the functional layer includes nitrides of Cr metal and / or Ti metal.

18. The coated article according to claim 16 or 17, characterized in that, The base layer is a Cr layer; the functional layer is at least one of CrSiCN, CrSiN, CrN, TiN and TiCN.

19. The coated article according to any one of claims 16-18, characterized in that, The thickness of the substrate is 100nm to 200nm; the thickness of the functional layer is 50nm to 300nm.

20. A method for preparing a coated article according to any one of claims 1-19, characterized in that, Includes the following steps: A color layer is formed on at least a portion of the surface of a substrate to obtain the coated article; The color layer comprises a composite oxide of M metal and Cr metal, wherein the refractive index of the oxide of M metal is greater than 2.

21. The method for preparing a coated article according to claim 20, characterized in that, Forming a color layer on at least a portion of the surface of a substrate includes: The color layer is formed by magnetron sputtering deposition on at least a portion of the surface of the substrate using a first target and a second target, and by introducing argon and oxygen; wherein the first target provides a Cr source and the second target provides an M metal source.

22. The method for preparing a coated article according to claim 21, characterized in that, Using a first target and a second target, and introducing argon and oxygen, magnetron sputtering deposition is performed on at least a portion of the surface of the substrate to form the color layer, including: The color layer is formed by magnetron sputtering deposition on at least a portion of the surface of the substrate using the first and second targets and by introducing argon, nitrogen, and oxygen.

23. The method for preparing a coated article according to claim 20, characterized in that, Forming a color layer on at least a portion of the surface of a substrate includes: An underlayer is formed on at least a portion of the surface of the substrate; A functional layer is formed on at least a portion of the surface of the substrate; The color layer is formed on at least a portion of the surface of the functional layer.

24. The method for preparing the coated article according to any one of claims 20-23, characterized in that, The number of color layers is A, where A is a positive integer greater than or equal to 1; the method further includes: An interference layer is formed by magnetron sputtering deposition on at least a portion of the surface of the i-th color layer using a third target and argon gas; wherein i is a positive integer greater than or equal to, less than or equal to A; the number of interference layers is B layers, where B is a positive integer greater than or equal to 1; the third target is provided with at least one of Cr source, Ti source, Nb source, and Si source.

25. An electronic product, characterized in that, The coated article includes any one of claims 1-19.

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