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Preparation method for zirconia ceramic rear cover of mobile phone

A zirconia ceramic and mobile phone back cover technology is applied in the field of preparation of high toughness zirconia ceramic mobile phone back cover, which can solve the problems of slow drying and degumming process, unsuitable for mass production, unsuitable for thin-walled parts molding, etc. Achieve the effect of reducing the amount of subsequent processing, meeting mass production, and improving impact resistance

Active Publication Date: 2015-10-07
NANCHONG THREE CIRCLE ELECTRONICS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, dry compression molding and injection molding are only suitable for forming thick parts with a thickness greater than 1mm. For large-sized and thin-walled parts, it is difficult for these two molding methods to avoid uneven material density caused by uneven molding pressure. Parts are easily deformed or even cracked during sintering
Patent 201410158633.5 "a ceramic mobile phone shell and its preparation method" provides a method of gel injection molding to form a zirconia ceramic mobile phone back cover. Although it can solve the deformation and cracking problems during the sintering process of the green body, the gel injection The green body needs a slow drying and debinding process
Therefore, the method is inefficient and not suitable for large-scale production
[0004] The flexural strength of zirconia ceramics is much higher than that of glass and engineering plastics, but its fracture toughness is still low (1 / 2 ), the impact resistance is insufficient, and it is easy to break under the action of external impact force during actual use
Patents 201410158633.5, 201410036959.0, 201310384049.7, and 201010173564.7 all use ordinary zirconia powder to prepare zirconia ceramic mobile phone shells, and did not design and develop corresponding zirconia ceramic materials for the high toughness requirements of the mobile phone back cover, so the fracture toughness is still low
In addition, the molding methods such as dry pressing and injection (or injection molding) used in the above-mentioned patents are not suitable for the molding of thin-walled parts.

Method used

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  • Preparation method for zirconia ceramic rear cover of mobile phone
  • Preparation method for zirconia ceramic rear cover of mobile phone

Examples

Experimental program
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Embodiment 1

[0027] Embodiment 1: An embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention

[0028] A kind of embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention, described method comprises the following steps:

[0029] (1) Doping modification of nano-zirconia powder

[0030] Get 10kg of yttrium oxide-stabilized high-purity nano-zirconia powder, wherein the molar content of yttrium oxide is 2% of the nano-zirconia molar content in the yttria-stabilized high-purity nano-zirconia powder, and use deionized water to prepare For a suspension with a solid content of 60%, add 0.8wt% ammonium polyacrylate dispersant to the above suspension, add Al in the form of a soluble salt 2 o 3 、TiO 2 and SiO 2 , where the Al 2 o 3 The soluble salt of AlCl 3 ·6H 2 O, the Al 2 o 3 The molar content is 0.5% of the molar content of nano-zirconia in the yttria-stabilized high-purity nano-zirco...

Embodiment 2

[0037] Embodiment 2: An embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention

[0038] A kind of embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention, described method comprises the following steps:

[0039] (1) Doping modification of nano-zirconia powder

[0040] Get 10kg of yttrium oxide-stabilized high-purity nano-zirconia powder, wherein the molar content of yttrium oxide is 2.5% of the nano-zirconia molar content in the yttria-stabilized high-purity nano-zirconia powder, and prepare it with deionized water For a suspension with a solid content of 60%, add 0.5wt'% ammonium polyacrylate dispersant to the above suspension, add Al in the form of a soluble salt 2 o 3 、TiO 2 and SiO 2 , where the Al 2 o 3 The soluble salt of Al(NO) 3 9H 2 O, the Al 2 o 3 The molar content is 0.35% of the molar content of nano-zirconia in the yttria-stabilized high-purity na...

Embodiment 3

[0047] Embodiment 3: An embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention

[0048] A kind of embodiment of the preparation method of the zirconia ceramic mobile phone back cover of the present invention, described method comprises the following steps:

[0049] (1) Doping modification of nano-zirconia powder

[0050] Get 10kg of yttrium oxide-stabilized high-purity nano-zirconia powder, wherein the molar content of yttrium oxide is 3% of the nano-zirconia molar content in the yttria-stabilized high-purity nano-zirconia powder, and use deionized water to prepare For a suspension with a solid content of 40%, add 0.2wt% ammonium polyacrylate dispersant to the above suspension, add Al in the form of a soluble salt 2 o 3 、TiO 2 and SiO 2 , where the Al 2 o 3 The soluble salt of AlCl 3 ·6H 2 O, the Al 2 o 3 The molar content is 0.25% of the molar content of nano-zirconia in the yttria-stabilized high-purity nano-zi...

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Abstract

The invention provides a preparation method for a zirconia ceramic rear cover of a mobile phone. The zirconia ceramic rear cover of the mobile phone prepared in the invention has the characteristics of high strength, high toughness, high size precision, etc. The rear cover with a maximum size is applicable to a mobile phone with a size of 6 inches, and the thickness of the rear cover may be 0.15 to 0.8 mm. Moreover, the zirconia ceramic rear cover may be in a flat shape, a 2D shape, a 3D shape or other complex shapes in virtue of different shaping dies, so requirements of mobile phones of different specifications can be met. The preparation method for the zirconia ceramic rear cover of the mobile phone has high production efficiency and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a mobile phone back cover, in particular to a preparation method for a high-toughness zirconia ceramic mobile phone back cover. Background technique [0002] The mobile phone shell is not only the most direct way to protect the body, but also an important factor affecting its cooling effect, weight, and aesthetics. Therefore, the materials for making mobile phone casings are required to have the characteristics of high strength, good heat resistance and wear resistance, electromagnetic shielding, stable dimensions, and good appearance. At present, most of the mobile phone casings on the market are made of engineering plastics, metals, glass and other materials. These materials still have disadvantages such as low hardness, easy scratches, deformation, fading, environmental protection, and heat resistance. In recent years, ceramic mobile phone casings with the characteristics of beautiful appearance, jade texture, wear resistan...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 谢灿生邱基华
Owner NANCHONG THREE CIRCLE ELECTRONICS
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