Manufacturing method and application of alveolate blind hole toughened zirconium oxide ceramic shell

A technology of zirconia ceramics and a manufacturing method, which is applied to the structure of telephones and other directions, can solve the problems of inconsistent development paths of light and thin electronic products, cumbersome zirconia ceramic backplanes, poor anti-drop performance, etc., and achieve high processing efficiency and cost advantages. , Conducive to the development of light and thin, and the effect of reducing weight

Active Publication Date: 2018-01-12
深圳市首瓷新技术科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to reports, the book "Structural Ceramics" by Xie Zhipeng introduces ZrO, which is currently commercially available with the best toughening performance. 2 Ceramic fracture toughness is only 8 ~ 12MPa.m 1 / 2 However, there are still problems in commercial use: the ratio of zirconia ceramics to metal and plastic, the fracture toughness is still poor, and the drop resistance performance is poor, which will inevitably limit its application. Made of thicker ceramics, some even more than 1mm thick, and the density of zirconia ceramics is as high as 6.1g / cm 3 , which will inevitably lead to cumbersome zirconia ceramic backplanes, which is inconsistent with the development path of thinner and lighter electronic products

Method used

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  • Manufacturing method and application of alveolate blind hole toughened zirconium oxide ceramic shell
  • Manufacturing method and application of alveolate blind hole toughened zirconium oxide ceramic shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Weigh 14g of γ-(methacryloyloxy)propyltrimethoxysilane, 1.706kg of 3Y-TZP ceramic powder with a D50 of 30nm, 180g of No. 58 paraffin and 100g of polypropylene, and add the weighed organic matter into a 3L Heat up the internal mixer to 130°C to melt it, then add the ceramic powder into the internal mixing in 3 times, after the ceramic powder is added, pump the negative pressure of the internal mixer to -0.05MPa, and internally mix at 135°C for 3 hours get fed. Put the feed into the hopper of the injection molding machine, put the 2.15-inch watch case mold cavity into the injection molding machine, pump the 2.15-inch watch case mold cavity to -0.08MPa, set the barrel temperature of the injection molding machine to 145°C, and inject The pressure is 180MPa for injection molding, so that the molten feeding material is injected into the mold cavity at high speed and kept under pressure for 4 seconds to obtain the watch case back plate blank.

[0040] Palletize the watch case...

Embodiment 2

[0046] Weigh 16g of ammonium stearate, 1.704kg of 3Y-TZP ceramic powder with a D50 of 30nm, 180g of No. 56 paraffin and 100g of polyethylene, add the weighed organic matter into a 3L internal mixer and heat up to 115°C to melt it. Then add the ceramic powder into the internal mixing in 3 times. After the ceramic powder is added, the negative pressure of the internal mixer is pumped to -0.05MPa, and the internal mixing is carried out at 120°C for 4 hours to obtain the feed. Put the feed material into the hopper of the injection molding machine, put the cavity of the mobile phone mold with a thickness of 5 inches into the injection molding machine, pump the cavity of the 5-inch mobile phone mold to -0.09MPa, set the temperature of the barrel of the injection molding machine to 130°C, and inject The pressure is 250MPa for injection molding, so that the molten feed material is injected into the mold cavity at high speed and kept under pressure for 3 seconds to obtain the mobile pho...

Embodiment 3

[0053] Weigh 10g of stearic acid, 1.85kg of 3Y-TZP ceramic powder with a D50 of 200nm, 80g of No. 58 paraffin and 60g of polyphenylene sulfide, add the weighed organic matter into a 3L internal mixer and heat up to 120°C to melt it , and then add the ceramic powder into the internal mixing in 3 times. After the ceramic powder is added, the negative pressure of the internal mixer is pumped to -0.08MPa, and the internal mixing is carried out at 150°C for 1 hour to obtain the feed. Put the feed into the hopper of the injection molding machine, put the 8-inch flat mold cavity into the injection molding machine, pump the 8-inch flat mold cavity to -0.07MPa, set the barrel temperature of the injection molding machine to 155°C, and the injection pressure For 200MPa injection molding, the molten feed material is injected into the mold cavity at high speed and kept under pressure for 5 seconds to obtain a flat shell blank.

[0054] Palletize the flat shell blanks into the degreasing fu...

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Abstract

The invention discloses a manufacturing method and application of an alveolate blind hole toughened zirconium oxide ceramic shell. The method comprises the following steps: sintering a green body at the temperature lower than the ceramic sintering temperature to obtain a biscuit, of which the particles are partially sticky, wherein the biscuit has certain strength and the density is only 85%-95% of the theoretical density; engraving a regularly polygonal blind hole or a round blind hole by a fine engraving machine; sintering again to perform densification; and filling an organic macromolecularplastic material which is solidified with epoxy resin or silica gel and the like into the blind hole. On one hand, according to the scheme, sintering processing is conducted at the temperature lowerthan the sintering temperature, processibility higher than that of an injection molding green body is achieved, higher processing efficiency and cost advantage are achieved in compared with those of sintering piece processing, and the organic macromolecular plastic material in the blind hole absorbs part of impact energy which falls off in the colliding and falling process, so that the breaking toughness of the ceramic shell is improved. On the other hand, according to the scheme, the weight of the shell can be effectively reduced, lighting and thinning of electronic products are benefited, and the alveolate blind hole toughened zirconium oxide ceramic shell can be used for preparing consumer electronic shells such as watch shells, mobile phone shells and tablet computer shells.

Description

technical field [0001] The invention relates to the field of structural parts preparation, in particular to the field of preparation of consumer electronics backplane structural parts, in particular to a method for manufacturing a honeycomb blind hole toughened zirconia ceramic shell and its application. Background technique [0002] With the rapid development of consumer electronics, structural components such as shells (backplanes) of consumer electronics have made remarkable progress. Especially in the structural design of consumer electronic housings in the 5G era, traditional metals pose a huge challenge to antenna design due to their own shielding effect, while the inherent low strength of plastics limits their use in large-size screens and ultra-thin fields. In addition, with the improvement of consumers' aesthetic needs, traditional metal casings and plastic casings will be difficult to impress consumers. [0003] Because ZrO2 ceramics have high toughness, good hard...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B41/83H04M1/18
Inventor 周涛沈同德雒文博
Owner 深圳市首瓷新技术科技有限公司
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