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Zirconia ceramics and its preparation method, housing and electronic equipment

A zirconia ceramic, zirconia technology, applied in the direction of electrical equipment shell/cabinet/drawer, electrical components, etc., can solve the problems of easy warpage of ceramic sheets, inconsistent shrinkage rate, low yield, etc.

Active Publication Date: 2021-09-07
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are two commonly used methods for making colored ceramic back covers. One is to spray or print glaze on the ceramic surface, and use the color characteristics of the glaze to prepare colored ceramic back covers. , vanadium yellow, iron red, etc. are used as colored glazes to adjust the desired color. Due to the inconsistent thermal expansion coefficients of the glaze and the ceramic body, the shrinkage rate is inconsistent, so that the ceramic sheet obtained by this method is prone to warping problems, and the yield is low.
The other two are to add colored oxides to the powder, and use the valence change of the colored oxides during high-temperature sintering to achieve the purpose of coloring. Add colored oxide powder directly to the ceramic powder, although there is no inconsistent shrinkage rate. However, the mechanical properties of the ceramics obtained by this method are poor, and it is difficult to obtain a real pink gold

Method used

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  • Zirconia ceramics and its preparation method, housing and electronic equipment
  • Zirconia ceramics and its preparation method, housing and electronic equipment
  • Zirconia ceramics and its preparation method, housing and electronic equipment

Examples

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preparation example Construction

[0022] like figure 1 As shown, the preparation method of zirconia ceramics according to the first embodiment, the zirconia ceramics prepared by this method can be used to process and manufacture housings (such as the back cover of electronic equipment, such as mobile phones and tablet computers), decorative parts, Appearance parts, etc. The zirconia ceramic prepared by the method is pink gold, and its LAB value is as follows: the L value is 83-87, the a value is 6-8, and the b value is 6-8. L stands for Luminosity, equivalent to brightness, a stands for the range from red to green, and b stands for the range from blue to yellow. The preparation method of the zirconia ceramics comprises the following steps:

[0023] Step S110: molding the mixture to obtain a green body.

[0024] Among them, the mixture includes raw materials, and according to the mass percentage, the raw materials include: 85% to 90% of zirconia, 1% to 4% of aluminum oxide, 2% to 3.8% of yttrium oxide, 2.1% ...

Embodiment 1

[0066] The preparation process of the pink gold zirconia ceramics of the present embodiment is as follows:

[0067](1) Mix and ball-mill raw materials, binders, defoamers, plasticizers and solvents to obtain a mixture. Among them, according to the mass percentage, the raw material is composed of the following components: 88% zirconia, 2% aluminum oxide, 2.5% yttrium oxide, 2.8% zinc oxide, 1% titanium oxide, 0.5% Chromium, 0.5% silicon oxide, 0.5% nickel oxide and 2.2% hafnium oxide. And the median particle size of the raw material is 500 nm to 1200 nm; the binder is polymethyl methacrylate (PMMA); the solvent is a mixture of toluene and ethylene glycol with a mass ratio of 7:3. The defoamer is dimethylsiloxane; the plasticizer is dibutyl phthalate (DBP); in the mixture, the mass percentage of the defoamer is 3%, and the mass percent of the plasticizer is The component content is 8%, the mass percentage content of the binder is 8%, and the mass percentage content of the solv...

Embodiment 2

[0071] The preparation process of the pink gold zirconia ceramics of the present embodiment is as follows:

[0072] (1) Mix and ball-mill raw materials, binders, defoamers, plasticizers and solvents to obtain a mixture. Among them, according to the mass percentage, the raw material is composed of the following components: 85% zirconia, 4% aluminum oxide, 3.8% yttrium oxide, 2.1% zinc oxide, 1.2% titanium oxide, 1% oxide Chromium, 1% silicon oxide, 1% nickel oxide and 0.9% hafnium oxide. And the median particle size of the raw material is 500 nanometers to 1200 nanometers; the binder is polymethyl methacrylate (PMMA) and polyvinyl butyral (PVB) with a mass ratio of 1:1; the solvent is absolute ethanol The defoamer is dimethylsiloxane; the plasticizer is dioctyl phthalate (DOP) and butyl benzyl phthalate (BBP) with a mass ratio of 1:1; in the mixture, The mass percentage of the defoamer is 2%, the mass percentage of the plasticizer is 5%, the mass percentage of the binder is 7...

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Abstract

The invention relates to a zirconia ceramic, a preparation method thereof, a casing and electronic equipment. The preparation method of the zirconia ceramics comprises the following steps: molding the mixture to obtain a green body, wherein the mixture includes raw materials, and the raw materials include: 85% to 90% of zirconia, 1% to 4% of alumina, 2% to 3.8% of yttrium oxide, 2.1% to 4.1% of zinc oxide, less than 1.2% of titanium oxide, less than 1% of chromium oxide, less than 1% of silicon oxide and less than 1% of oxide Nickel; the green body is sintered to obtain zirconia ceramics. The color of the ceramics prepared by the above method for preparing zirconia ceramics is pink gold, and has good mechanical properties.

Description

technical field [0001] The invention relates to a zirconia ceramic, a preparation method thereof, a casing and electronic equipment. Background technique [0002] At present, there are two commonly used methods for making colored ceramic back covers. One is to spray or print glaze on the ceramic surface, and use the color characteristics of the glaze to prepare colored ceramic back covers. , vanadium yellow, iron red, etc. are used as colored glazes to adjust the desired color. Due to the inconsistent thermal expansion coefficients of the glaze and the ceramic body, the shrinkage rate is inconsistent, so that the ceramic sheet obtained by this method is prone to warping problems, and the yield is low. The other two are to add colored oxides to the powder, and use the valence change of the colored oxides during high-temperature sintering to achieve the purpose of coloring. Add colored oxide powder directly to the ceramic powder, although there is no inconsistent shrinkage rat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/49C04B35/622H05K5/00
CPCC04B35/49C04B35/622C04B2235/3217C04B2235/3225C04B2235/3232C04B2235/3241C04B2235/3279C04B2235/3284C04B2235/3418C04B2235/77C04B2235/96C04B2235/9661H05K5/00
Inventor 晏刚杨光明
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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