Color ceramic

Abstract

The invention discloses color ceramic. The color ceramic comprises a ceramic face. The upper part of the ceramic face is provided with a color layer, and the lower part of the ceramic face is printedwith an ink layer. The color layer is a stacking film layer formed by alternately arranging a first film layer and a second film layer, wherein a refractive index of the first film layer is higher than the refractive index of the second film layer. The color ceramic is capable of using a hard thin-film material as the color layer, improving the hardness and scratch-resistant properties of the filmlayers, changing the surface roughness of the ceramic, adjusting a specular reflection and diffuse reflection proportion, controlling the integral color effect, using a vacuum coating technology to accurately control the thickness of the film layers, and guaranteeing the stability and consistency of the color.

Description

technical field [0001] The invention relates to a ceramic, especially a colored ceramic. Background technique [0002] For existing colored ceramics, the method of adding toner is generally used. The prior art is generally divided into two types: the first one: doping colored pigments into the ceramic powder, such as described in the patent CN104446457A, currently colored ceramics are generally Adding inorganic pigments to the ceramic powder can produce ceramics of the desired color. Taking zirconia as an example, the intrinsic zirconia ceramics are white, and pink zirconia ceramics can be obtained after adding erbium oxide to the modified ceramic material; After adding cobalt oxide to the modified ceramic material, brown zirconia ceramics can be obtained; after adding manganese oxide to the modified ceramic material, blue modified zirconia ceramics can be obtained; if various inorganic oxide pigments are added to it, it can be Adjust the color of ceramics to achieve the pu...

AI Technical Summary

Problems solved by technology

The second method: do color coating on the ceramic surface, for example, in the patent CN105622169A, the ceramic surface uses glass powder and pigments for color modulation, and then sinters and polishes to obtain a smooth surface with the same texture as ceramics. The manufacturing process is similar to that in glaze Color process, which can theoretically produce any color, but the texture effect is difficult to adjust, and it cannot have a metallic texture or glaze color effect

[0003] The first technology presents colors by doping colored pigments into ceramic powders. The colors mainly present various colors through the color of the pigment body or the change in the valence state of metal ions during the sintering process. Therefore, its disadvantages are as follows: 1. The color is generally light and the concentration is not high, so it cannot be gorgeous and has a metallic color effect; 2. Ceramic hair color is prone to stains and unevenness; 3. The color is not stable enough and easy to fluctuate; 4. The production cycle is long, The process is complicated; 5. Once the ceramics are processed and shaped, the color cannot be changed; 6. There are hidden dangers in the mechanical properties of colored ceramics

The second technique is to make a colored coating on the surface of the ceramic, which mainly depends on the color of the coating, so its disadvantages are as follows: 1. The surface coating is easy to cause warping of the porcelain body; 2. There is a risk of peeling off the coating during use; 3. , Once processed, the color cannot be changed; the texture of the samples obtained by the above two color ceramic preparation methods cannot have the metallic texture color effect

[0004] The technology and corresponding reasons caused by the first solution are: 1. Because the proportion of doped coloring material is small, and the coloring material is mostly inorganic, the color saturation is not enough. If the proportion increases, the mechanical properties are prone to sharp decline; 2. The color spots are due to the agglomeration of the added pigment particles; the unevenness is caused by the mismatch between the growth rate of the pigment grains and the ceramic body material; 3. Because the added oxides are easily affected by the atmosphere during the sintering process, temperature fluctuations appear The difference in color concentration; 4. Because the added oxide powder needs to be evenly mixed with the porcelain powder, some need to be prepared together with the porcelain powder, such as co-precipitation method, sol-gel method, ion exchange method; 5. Because the appearance of color is It appears after sintering, and the growth of sintered crystal grains is an irreversible process. Once formed, it cannot be reworked; 6. In order to achieve uniform color, some ceramic powders are prepared together with pigments and porcelain powders, and some ceramic powder material crystals are colored Material changes, lattice distortion occurs, and crystal defects exist

The technology and corresponding reasons caused by the second scheme are: 1. There is a difference in expansion coefficient or thermal stress between the ceramic and the coating during the sintering process. When there is a difference in the consistency of the two, warping will occur; 2. Because the coating When the layer is affected by external force together with the ceramic, the deformation is inconsistent, and the glass is a brittle material, which is prone to inelastic fracture; 3. The firing of the color is an irreversible process, and once it is fired, it cannot be changed

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