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Ceramic mobile phone shell and preparation method thereof

A mobile phone case and ceramic technology, applied in the field of ceramic mobile phone case and its preparation, can solve the problems of uneven density distribution of green body, uneven microstructure, poor performance of mobile phone case, etc., and achieve high fracture toughness, good mechanical properties, stress Evenly distributed effect

Active Publication Date: 2014-07-30
ZHONGCAI HIGH NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And when molding products, due to the existence of the stress field, it is easy to cause uneven density distribution of the green body. Although there is a subsequent cold isostatic pressing process, this unevenness is difficult to completely eliminate, which leads to inconsistent shrinkage during the sintering process of the finished product. Deformation, and the performance of the mobile phone case is relatively poor due to the unevenness of the microstructure
Generally speaking, when the side length of the ceramic mobile phone case is > 100mm, this molding process is only applicable to the molding of piece ceramic products with a thickness ≥ 1.5mm

Method used

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  • Ceramic mobile phone shell and preparation method thereof
  • Ceramic mobile phone shell and preparation method thereof

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preparation example Construction

[0028] In a first aspect, an embodiment of the present invention provides a method for preparing a ceramic mobile phone case, comprising the following steps:

[0029] Taking ceramic powder, an organic functional additive with a mass ratio of 2% to 8% of the ceramic powder, and a solvent with a mass ratio of 7% to 18% of the ceramic powder as raw materials; the organic functional additive Comprising monomers, crosslinking agents and photoinitiators, the solvent is one of deionized water, polyethylene glycol, ethanol or a mixture of polyethylene glycol and ethanol;

[0030] mixing the ceramic powder, an organic functional additive and a solvent, and performing wet ball milling to form a gelable ceramic slurry, and defoaming the gelable ceramic slurry;

[0031] The gelable ceramic slurry after defoaming treatment is injected into the preset mold, and the gelation process is initiated by ultraviolet light irradiation to obtain a ceramic mobile phone shell body, and then the obtain...

Embodiment 1

[0058] Take the preparation of a zirconia ceramic mobile phone case with a size of 120mm×60mm×0.5mm as an example with a φ10 hole (camera hole) in the middle:

[0059] Get each raw material by following weight ratio:

[0060] Zirconia powder with an average particle size of 0.3μm 475kg

[0061] Titanium dioxide 25kg

[0062] Acrylic polyester 20kg

[0063] N,N'-methylenebisacrylamide 0.1kg

[0064] Polydimethylacrylic acid 0.15kg

[0065] 1-Hydroxycyclohexyl phenyl ketone 0.2kg

[0066] 2-Hydroxy-2-methylphenylpropan-1-one 0.06kg

[0067] Deionized water 75kg

[0068] After mixing the above-mentioned various raw materials, perform wet ball milling to make a gelatable ceramic slurry, and vacuum stir and defoam the obtained gelatable ceramic slurry;

[0069] Inject the gelled ceramic slurry after defoaming treatment into the preset mold, using 320nm wavelength and light intensity of 500mW / cm 2 The gel process is completed by irradiating ultraviolet light for 0.5min; usin...

Embodiment 2

[0073] Take the preparation of an alumina ceramic mobile phone case with a size of 100mm×50mm×0.4mm as an example to illustrate:

[0074] Get each raw material by following weight ratio:

[0075] Average particle size 0.8μm high purity α-alumina powder 199kg

[0076] Yttrium oxide 1kg

[0077] Methacrylic acid 3kg

[0078] Polydimethylacrylic acid 0.15kg

[0079] 2,4,6-Trimethylbenzoylphenylphosphonic acid ethyl ester 0.06kg

[0080] Sodium tripolyphosphate 1kg

[0081] Deionized water 36kg

[0082] After mixing the above-mentioned various raw materials, perform wet ball milling to make a gelatable ceramic slurry, and vacuum stir and defoam the obtained gelatable ceramic slurry;

[0083] Inject the gelatable ceramic slurry after defoaming treatment into the preset mold, using 265nm wavelength and light intensity of 430mW / cm 2 The gel process was completed by irradiating ultraviolet light for 1 min; a large-sized ceramic green sheet with a size of 300mm×300mm×0.8mm was p...

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Abstract

The invention provides a preparation method of a ceramic mobile phone shell. The ceramic mobile phone shell is prepared by initiating the following raw materials with ultraviolet light and further sintering. The raw materials comprise ceramic powder, organic functional additives accounting for 2%-8% of the weight of ceramic powder and solvent accounting for 7%-18% of the weight of ceramic powder, wherein the organic functional additives comprise monomers, cross-linking agent and photoinitiator; the interior of the obtained ceramic mobile phone shell is of a crystal structure, the diameter ratio of maximum grains to minimum grains in the crystal structure is less than 5 and the average grain size is less than 5mu m. According to the ceramic mobile phone shell and the preparation method thereof provided by the embodiment of the invention, the problems of poor performances caused by non-uniform internal structure of a chip type mobile phone shell in the prior art and incapability of obtaining the ceramic mobile phone shell with good mechanical properties, large size and small thickness are solved.

Description

technical field [0001] The invention relates to the field of ceramic mobile phone cases, in particular to a ceramic mobile phone case and a preparation method thereof. Background technique [0002] At present, due to its beautiful appearance, jade-like luster and smooth feel, the application of ceramics in mobile phone casings has gradually been sought after and loved by consumers. Due to the high hardness and wear resistance of ceramics, it will not be used as a mobile phone casing. Scratches or abrasions ensure that the mobile phone lasts as new as possible. It is not only environmentally friendly, but also has high ornamental value. [0003] Ceramic materials need to have good impact resistance if they want to be used as mobile phone cases, and the current mobile phones are developing in the direction of ultra-large, ultra-light, and ultra-thin, and the screen size has exceeded 5 inches (127mm). Parameters such as shape and thickness put forward higher requirements. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/10C04B35/584C04B35/634C04B35/622
Inventor 赵小玻刘子峰涂运骅王玉宝鲍晓芸
Owner ZHONGCAI HIGH NEW MATERIAL
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