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Mobile terminal shell and preparation method thereof, and mobile terminal

A mobile terminal and casing technology, applied in the field of mobile terminal casing processing, can solve the problems of high processing cost, high strength, low yield, etc., and achieve the effects of reducing processing cost, excellent performance, and high yield

Inactive Publication Date: 2017-02-22
DONGGUAN HUAJING POWDER METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the zirconia material has high hardness and high strength. When it is applied to the preparation of electronic equipment casings with complex structures, it makes the processing and grinding of zirconia materials difficult, the yield rate is low, and the processing cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] This specific embodiment provides a method for preparing a mobile terminal casing, including the following steps:

[0025] S1, prepare zirconia powder, the powder includes Y with a mass fraction of 4-8% 2 o 3 , with a mass fraction of 0.1-20% Al 2 o 3 , with a mass fraction of 72-95.9% ZrO 2 .

[0026] In this step, by Y 2 o 3 and Al 2 o 3 Improved ZrO 2 Formulated into zirconia powder. By adding a small amount of Y 2 o 3 , Al 2 o 3 , can improve the low-temperature sintering performance of zirconia ceramic powder, and increase the strength of the green body after subsequent low-temperature sintering. Aluminum plays the role of dispersion strengthening and refining zirconia grains, and ultimately improves the strength and hardness of the material.

[0027] Preferably, the nano-scale zirconia powder within the range of 0.2-0.8 μm is prepared, so that the shell performance of the subsequently prepared mobile terminal is better.

[0028] S2, according to th...

experiment example 1

[0042] 1. Preparation of nano zirconia powder, including Y with a mass fraction of 4% 2 o 3 , with a mass fraction of 0.5% Al 2 o 3 , with a mass fraction of 95.5% ZrO 2 . The particle size of the nano zirconia powder is in the range of 0.2-0.8 μm.

[0043] 2. Prepare a binder, mix polyvinyl alcohol and water in a ratio of 15:85 to make a binder with a concentration of 15%.

[0044] 3. Grind the binder and zirconia powder in a ball mill for 48 hours at a ratio of 10:90, then spray and granulate, and then mold the mobile phone shell ceramic body.

[0045] 4. Sintering the ceramic green body of the mobile phone case at a low temperature of 850°C. After sintering at low temperature, the green body has a certain shrinkage and reaches a certain strength. After testing, its bending strength is 380MPA.

[0046] 5. Carry out CNC precision machining under this condition to form a complex structure on the shell product, and then sinter to 1480 ° C to 1500 ° C to obtain the shell...

experiment example 2

[0049] 1. Preparation of nano zirconia powder, including Y with a mass fraction of 5% 2 o 3 , with a mass fraction of 1% Al 2 o 3 , with a mass fraction of 94% ZrO 2 . The particle size of the nano zirconia powder is in the range of 0.2-0.8 μm.

[0050] 2. Prepare a binder, mix polyvinyl alcohol and water in a ratio of 10:90 to make a binder with a concentration of 10%.

[0051] 3. Mill the binder and zirconia powder in a ball mill at a ratio of 15:85 for 48 hours, then spray and granulate, and then form a mobile phone shell ceramic body by molding.

[0052] 4. Sinter the ceramic green body of the mobile phone case at a low temperature of 950°C. After sintering at low temperature, the green body has a certain shrinkage and reaches a certain strength. After testing, its bending strength is 430MPA.

[0053] 5. Carry out CNC precision machining under this condition to form a complex structure on the shell product, and then sinter to 1480 ° C to 1500 ° C to obtain the shel...

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Abstract

The invention discloses a mobile terminal shell and a preparation method thereof, and a mobile terminal. The preparation method of the mobile terminal shell comprises the following steps: S1, preparing a zirconia powder, wherein the powder includes 4-8 mass% of Y2O3, 0.1-20 mass% of Al2O3, and 72-95.9 mass% of ZrO2; S2, according to the mass ratio of (80-95):(5-20), mixing evenly the zirconia powder and a binder, drying, and ball-milling to obtain a ceramic powder; S3, pressing the ceramic powder into a required mobile terminal shell blank body; S4, sintering the shell blank body from room temperature to the temperature of 800-1000 DEG C, to obtain a low temperature sintered body; S5, processing the low temperature sintered body into a required complex structure by a cutting process; and S6, sintering the sintered body treated in the step S5 from room temperature to the temperature of 1480-1500 DEG C to obtain the shell. With the preparation method, the prepared zirconia shell has the advantages of high finished product rate and low processing cost.

Description

[0001] 【Technical field】 [0002] The invention relates to a mobile terminal shell processing technology, in particular to a mobile terminal shell, a preparation method thereof, and a mobile terminal. [0003] 【Background technique】 [0004] Zirconia material has excellent mechanical properties, with a bending strength of up to 1000MPa and a fracture toughness of up to 10MPa m 1 / 2 , known as ceramic steel, is a very important structural ceramic material and is widely used in industrial machinery. Zirconia material has a jade-like appearance after polishing, and it has increasingly attracted the attention of high-end jewelry materials. However, the zirconia material has high hardness and high strength. When it is applied to the preparation of an electronic device housing with a complex structure, the processing and grinding of the zirconia material is difficult, the yield is low, and the processing cost is high. [0005] 【Content of invention】 [0006] The technical problem t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/64H04M1/18
CPCC04B35/48C04B35/64C04B2235/3217C04B2235/3246C04B2235/656H04M1/18
Inventor 王落平钟孝贤彭毅萍
Owner DONGGUAN HUAJING POWDER METALLURGY