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A kind of light-shielding ceramic and its preparation method

A technology of ceramics and ceramic layers, applied in the field of ceramics, can solve the problems of restricting the production and wider application of shading ceramics, affecting the whiteness and shading degree of ceramic products, and poor environmental test ability, achieving excellent shading effect and low cost , good shading effect

Inactive Publication Date: 2018-08-17
CHAOZHOU THREE CIRCLE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, among thinner ceramic products, once the thickness of white ceramics becomes thinner, the light transmittance of ceramics increases, which affects the whiteness and shading of thin ceramic products.
Usually the treatment method of shading ceramics is to achieve the white shading effect by screen printing ink shading paint, but the adhesion of the ink is limited, the reliability is poor, and it is easy to fall off, resulting in poor environmental resistance test ability.
These factors limit the production and wider application of light-shielding ceramics

Method used

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  • A kind of light-shielding ceramic and its preparation method

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Comparison scheme
Effect test

Embodiment 1

[0035] An embodiment of the light-shielding ceramic of the present invention, the light-shielding ceramic of this embodiment is prepared by the following method:

[0036] (1) Preparation of slurry: the material contained in the low refractive index ceramic layer: 60wt.% SiO 2 , 4wt.% of polyvinyl alcohol, 2wt.% of DOP, 4wt.% of TXA-15 and 30wt.% of ethanol were added to the ball milling tank, and then taken out after ball milling for 36 hours to obtain a low refractive index ceramic slurry; Material contained in the ceramic layer: 60wt.% ZrO 2 , 6wt.% of polyvinyl butyral, 2wt.% of dioctyl ester, 2wt.% of TXA-15 and 30wt.% of ethanol are added to the ball milling tank, ball milled for 8 hours and then taken out to obtain a high refractive index ceramic slurry;

[0037] (2) Powder molding: The low refractive index ceramic slurry and the high refractive index ceramic slurry obtained in step (1) are respectively cast and molded to obtain a low refractive index ceramic green body and a ...

Embodiment 2

[0042] An embodiment of the light-shielding ceramic of the present invention, the light-shielding ceramic of this embodiment is prepared by the following method:

[0043] (1) Preparation of slurry: the material contained in the low refractive index ceramic layer: 80wt.% Al 2 O 3 , 2wt.% of a mixture of polyvinyl butyral and polyvinyl chloride (the mass ratio of polyvinyl butyral and polyvinyl chloride is 1:1), 1wt.% of dioctyl ester, 5wt.% of PMMA and 12wt .% acetone was added to the ball milling tank, and then taken out after 32 hours of ball milling to obtain a low refractive index ceramic slurry; the material contained in the high refractive index ceramic layer: 85wt.% TiO 2 , 2wt.% of polyvinyl chloride, 2wt.% of DOP, 1wt.% of lecithin and 10wt.% of acetone are added to the ball milling tank, and then taken out after ball milling for 48 hours to obtain a high refractive index ceramic slurry;

[0044] (2) Powder molding: the low refractive index ceramic slurry and the high refrac...

Embodiment 3

[0049] An embodiment of the light-shielding ceramic of the present invention, the light-shielding ceramic of this embodiment is prepared by the following method:

[0050] (1) Preparation of slurry: the materials contained in the low refractive index ceramic layer: 85wt.% MgO, 3wt.% acrylic resin, 1wt.% dioctyl resin, 1wt.% lecithin and 10wt.% The butyl carbitol was added to the ball milling tank and taken out after ball milling for 48 hours to obtain a low refractive index ceramic slurry; the material contained in the high refractive index ceramic layer: 60wt.% Si 3 N 4 , 20wt.% of polyvinyl alcohol, 3wt.% of PEG, 5wt.% of PMMA and 12wt.% of toluene are added to the ball mill tank, and then taken out after ball milling for 2 hours to obtain a high refractive index ceramic slurry;

[0051] (2) Powder molding: dry pressing the low refractive index ceramic slurry and high refractive index ceramic slurry obtained in step (1) to obtain a low refractive index ceramic green body and a high...

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Abstract

The invention discloses a shading ceramic, especially a shading ceramic that can be applied to the field of fingerprint identification. The shading ceramic comprises ceramic layers with a low refractive index and ceramic layers with a high refractive index, wherein the ceramic layers with a low refractive index and ceramic layers with a high refractive index are laminated together alternatively. The disclosed shading ceramic is prepared by alternatively laminating ceramic layers with a low refractive index and ceramic layers with a high refractive. Because the difference of refractive indexes of two neighbored ceramic layers is large, the amount of scattering is low, and thus the provided ceramic has an excellent shading effect. At the same time, the invention also discloses a preparation method of the shading ceramic. The operation of the method is simple and the method is easy to realize. The obtained shading ceramic has the advantages of good whiteness value, high light transmittance, good shading effect, and low cost.

Description

Technical field [0001] The invention relates to the field of ceramics, in particular to a ceramic with shading performance and which can be used in the field of fingerprint identification and a preparation method thereof. Background technique [0002] Ceramic materials have excellent characteristics such as high strength, high hardness, good wear resistance and corrosion resistance, and are widely used in various fields, such as cutting tools, watch cases, molds, mobile phone shells and various ceramic structural parts. In recent years, with the continuous improvement of people’s requirements for decorations, ceramics have become the new favorite in the field of high-end decorations with their excellent mechanical properties, metallic luster, environmental friendliness, non-toxicity and non-allergic characteristics, such as high-end watch cases and bracelets. , Mobile phone shells and high-end buttons. [0003] But among the thinner ceramic products, once the thickness of white ce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B37/00C04B35/645B32B18/00
CPCB32B18/00C04B35/645C04B35/6455C04B37/001C04B2237/34C04B2237/341C04B2237/343C04B2237/346C04B2237/348C04B2237/36C04B2237/366C04B2237/368
Inventor 徐苏龙刘建伟张磊
Owner CHAOZHOU THREE CIRCLE GRP
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