Hand-held terminal product appearance ceramic thin type member and production method thereof

A technology for hand-held terminals and thin parts, applied in the field of ceramic product manufacturing

Active Publication Date: 2015-08-19
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, electronic components mainly use the special properties of ceramics such as piezoelectric and dielectric, and the tape casting method is rarely used in the preparation of large-scale products.
At present, there is no report that tape casting method is used to prepare the appearance parts of handheld terminal products.

Method used

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  • Hand-held terminal product appearance ceramic thin type member and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] In one embodiment, the preparation method of the casting slurry may include the following steps:

[0015] Weigh the ceramic powder, dispersant, solvent, binding agent and plasticizer of the above ratio;

[0016] Add the ceramic powder, dispersant and a part of the solvent into the ball mill tank, and perform the first ball mill for 12-20 hours to obtain a uniform initial slurry;

[0017] Put binder, plasticizer and remaining solvent into the ball mill tank, mix with the initial slurry, and perform second ball milling for 10-20 hours to obtain the required casting slurry.

[0018] The flow-casting slurry has suitable viscosity, which is beneficial to flow-casting to form a uniform and stable thin blank. The viscosity of the cast slurry can be 5~30Pa. s.

[0019] The ceramic powder can be zirconia, alumina or zirconia-toughened alumina composite powder, with an average particle size of 0.1 micron to 1 micron. The ceramic powder can have better wear resistance than met...

Embodiment 1

[0036] In this embodiment, the ceramic powder is made of zirconia ceramic powder, the average particle size of the powder is 0.2-0.3 microns, and the specific surface area is 11 m 2 / g.

[0037] (1) Casting slurry preparation and defoaming

[0038] Put 96.8g of zirconia ceramic powder, 60ml of ethanol and acetone mixture, 1.6ml of triolein, 2ml of n-butanol and ethylene glycol mixture (volume ratio 1:1), into the ball mill tank for the first ball mill , the time is 16 hours; 8.3g polyvinyl butyral, the mixed solution of 9.4ml polyethylene glycol and dibutyl phthalate, the mixture of 10ml ethanol and methyl ethyl ketone, add in this ball mill jar, carry out the second ball milling for 13 hours to obtain cast slurry.

[0039] The casting slurry was placed in a closed container, and rotated at a high speed for 10 minutes at a speed of 2200 r / min, so that the air bubbles in the slurry floated on the surface of the slurry and burst.

[0040] (2) casting

[0041] The casting spe...

Embodiment 2

[0054] In this example, the ceramic powder is made of zirconia toughened alumina ceramic composite powder, the average particle size of the powder is 0.3-0.5 microns, and the specific surface area is 8 m 2 / g.

[0055] (1) Casting slurry preparation and defoaming

[0056] 87.8g of zirconia ceramic powder and zirconia / alumina composite powder (among them the mass fraction of alumina is 10%), mixed with 55ml of ethanol and acetone, 1.4ml of triolein, 1.5ml of n-butanol and ethyl alcohol The diol mixture (volume ratio 1:1) was added to the ball mill tank for the first ball milling for 13 hours; a solution of 7.5g polyvinyl butyral, 8.7ml dibutyl phthalate, 9.5 mL of the mixture of ethanol and acetone was added into the ball mill jar, and the ball mill was carried out for the second time for 11 hours to obtain cast slurry.

[0057] The zirconia / alumina (10wt% alumina) composite powder casting slurry was placed in a closed container, and rotated at a high speed for 5 minutes at a...

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Abstract

A method for making a thin ceramic part involves making a casting slurry including a ceramic powder, a solvent, a binder, a plasticizer, and a dispersant. The casting slurry is tape casted to achieve a single layer green tape. At least two single layer green tapes are laminated to form a green tape lamination. The green tape lamination is dry pressed, dried, shaped, degreased, and fired to achieve the exterior component required.

Description

technical field [0001] The invention relates to the field of manufacturing ceramic products, in particular to a method for preparing a thin ceramic part with the appearance of a hand-held terminal product. Background technique [0002] The exterior parts of handheld terminal products, such as smartphones, PDAs, tablet computers, etc., are usually made of plastic or metal. ABS engineering plastic is light in weight and low in price, titanium alloy is light and thin and hard, aluminum alloy has high strength, corrosion resistance and high heat resistance. However, due to the frequent use of handheld terminal products, and most of them are used outdoors, environmental factors such as surrounding humidity and temperature have a greater impact on the operation of the handheld terminal. ABS material has a low heat distortion temperature, is flammable, has poor weather resistance, and has poor chemical stability and heavy specificity for metal materials. All of these have affecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622B29C48/76
CPCC04B35/64B32B18/00C04B35/10C04B35/109C04B35/48C04B35/486C04B35/4885C04B35/622C04B35/62218C04B35/6261C04B35/62615C04B35/62625C04B35/6263C04B35/632C04B35/634C04B35/638C04B37/005C04B2235/5409C04B2235/5445C04B2235/6025C04B2235/606C04B2235/6562C04B2235/6567C04B2237/064C04B2237/343C04B2237/348
Inventor 谢志鹏颜宏艳廖语茜
Owner TSINGHUA UNIV
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