Preparation method of zirconia ceramic rear cover of mobile phone

A technology for zirconia ceramics and mobile phone back covers, which is applied in the field of ceramic materials, can solve problems such as poor fracture resistance, and achieve the effects of improving thermal stability and fracture resistance, simple preparation methods, and uniform product texture

Inactive Publication Date: 2018-11-20
泉州市智通联科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the mobile phone back cover prepared by this patent is good, but its fracture resistance is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing a zirconia ceramic mobile phone back cover, prepared by the following method:

[0028] Step S1, uniformly mixing the modified zirconia powder and the yttrium oxide powder, the mixing weight ratio of the modified zirconia powder and the yttrium oxide powder is 100:2 to obtain a mixed powder;

[0029] Step S2, dissolving the mixed powder obtained in step S1 in absolute ethanol, adding ammonium polyacrylate, the amount of ammonium polyacrylate added is 0.5% of the weight of the mixed powder, wet grinding at 23°C for 36 hours, and after drying, the prepared process powder;

[0030] Step S3, adding polyethylene glycol, isopropanol, and zinc stearate to the pretreated powder obtained in step S2, and ultrasonically dispersing for 5 minutes to obtain a casting slurry; wherein, polyethylene glycol, isopropanol, hard The addition of zinc fatty acid is respectively 4.5%, 0.8% and 2.0% of the pretreated powder weight;

[0031] Step S4, vacuum defoaming the ...

Embodiment 2

[0037] A method for preparing a zirconia ceramic mobile phone back cover, prepared by the following method:

[0038] Step S1, uniformly mixing the modified zirconia powder and the yttrium oxide powder, the mixing weight ratio of the modified zirconia powder and the yttrium oxide powder is 100:3 to obtain a mixed powder;

[0039] Step S2, dissolving the mixed powder obtained in step S1 in absolute ethanol, adding ammonium polyacrylate, the amount of ammonium polyacrylate added is 1.5% of the weight of the mixed powder, wet grinding at 15°C for 30 hours, and after drying, the prepared process powder;

[0040] Step S3, adding polyethylene glycol, isopropanol, and zinc stearate to the pretreated powder obtained in step S2, and ultrasonically dispersing for 8 minutes to obtain a casting slurry; wherein, polyethylene glycol, isopropanol, hard The addition of zinc fatty acid is respectively 5.5%, 1.0% and 0.5% of the pretreated powder weight;

[0041] In step S5, the green body obtai...

Embodiment 3

[0046] A method for preparing a zirconia ceramic mobile phone back cover, prepared by the following method:

[0047] Step S1, uniformly mixing the modified zirconia powder and the yttrium oxide powder, the mixing weight ratio of the modified zirconia powder and the yttrium oxide powder is 100:5 to obtain a mixed powder;

[0048] Step S2, dissolving the mixed powder obtained in step S1 in absolute ethanol, adding ammonium polyacrylate, the amount of ammonium polyacrylate added is 0.3% of the weight of the mixed powder, wet grinding at 25°C for 25 hours, and after drying, the prepared process powder;

[0049] Step S3, adding polyethylene glycol, isopropanol, and zinc stearate to the pretreated powder obtained in step S2, and ultrasonically dispersing for 12 minutes to obtain casting slurry; wherein, polyethylene glycol, isopropanol, hard The addition of zinc fatty acid is respectively 8%, 0.5% and 2.5% of the pretreated powder weight;

[0050] In step S5, the green body obtain...

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Abstract

The invention discloses a preparation method of a zirconia ceramic rear cover of a mobile phone. The method comprises steps as follows: S1, modified zirconia powder and yttrium oxide powder are mixeduniformly, and mixed powder is obtained; S2, the mixed powder is dissolved in absolute ethyl alcohol, ammonium polyacrylate is added, wet grinding is performed for 20-36 h, and pretreated powder is obtained after drying treatment; S3, polyethylene glycol, isopropyl alcohol and zinc stearate are added to the pretreated powder, ultrasonic dispersion is performed, and tape casting slurry is obtained;S4, the tape casting slurry is subjected to vacuum defoaming, and a green body is obtained through tape casting; S5, the green body is subjected to three-stage thermal treatment and then subjected toshaping processing treatment, and the zirconia ceramic rear cover of the mobile phone is obtained. The prepared zirconia ceramic rear cover of the mobile phone has high hardness and bending strength,high anti-breaking capability, uniform texture and stable quality; the preparation method is simple, adopts a preparation process which is easy to operate, and is suitable for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of ceramic materials, in particular to a method for preparing a zirconia ceramic mobile phone back cover. Background technique [0002] At present, the materials of mobile phone back covers on the market are generally engineering plastics, metal, glass, etc. Although these materials can meet the performance requirements, they still have disadvantages such as low hardness, easy scratches, heat resistance, and easy breakage. With the popularity of high-priced smartphones, people pay more attention to product quality, pursuing beautiful and exquisite, anti-fall and wear-resistant, high-quality mobile phone back covers. Zirconia ceramic is a new high-tech ceramic material with low shielding, high strength, wear resistance, high temperature resistance and corrosion resistance. It has high strength and a hardness of about 8.5, which is similar to that of sapphire and has good chemical stability. Therefore, using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/62605C04B2235/3225C04B2235/425C04B2235/6562C04B2235/661C04B2235/77C04B2235/96
Inventor 林劝雄吴宇尧傅华中
Owner 泉州市智通联科技发展有限公司
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