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Zirconia ceramic sheet and its preparation method, cover plate of induction identification module, its preparation method and application

A technology of zirconia ceramics and zirconia powder, applied in the field of ceramic materials, can solve the problems of zirconia ceramic grain growth, lower production efficiency, and lower bending strength of products

Active Publication Date: 2019-06-28
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the secondary sintering temperature is low, the secondary sintering will lead to the growth of zirconia ceramic grains and reduce the bending strength of the product; secondly, the secondary sintering will directly increase the cost of zirconia sheet products and reduce production efficiency

Method used

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  • Zirconia ceramic sheet and its preparation method, cover plate of induction identification module, its preparation method and application
  • Zirconia ceramic sheet and its preparation method, cover plate of induction identification module, its preparation method and application
  • Zirconia ceramic sheet and its preparation method, cover plate of induction identification module, its preparation method and application

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preparation example Construction

[0025] Such as figure 1 As shown, a method for preparing a cover plate of an inductive identification module in an embodiment, the inductive identification module may be, for example, a fingerprint identification module, and the method for preparing a cover plate of the inductive identification module includes the following steps:

[0026] Step S110: providing a zirconia ceramic sheet.

[0027] Please also refer to figure 2 , wherein, the preparation method of zirconia ceramic sheet comprises the following steps:

[0028] Step S112: cast the zirconia ceramic slurry on the release film, and then dry to obtain the cast tape.

[0029] Wherein, the casting belt has a bottom surface opposite to the release film and an outer surface opposite to the bottom surface.

[0030] Wherein, the zirconia ceramic slurry in step S112 can be prepared by the following steps: mixing zirconia powder, solvent, dispersant, binder and plasticizer to obtain a viscosity of 1Pa·s-10Pa·s, solid The m...

Embodiment 1

[0056] The preparation process of the cover plate of the induction recognition module in this embodiment is as follows:

[0057] (1) Mix zirconia powder, solvent and dispersant by ball milling for 4 hours, then add binder and plasticizer and continue ball milling for 8 hours, then add defoamer, ball mill for 1 hour, and finally vacuum degassing for 1 hour, A zirconia ceramic slurry with a viscosity of 8.3 Pa·s and a mass percentage of solid phase of 55% was obtained. Among them, the median particle size of the zirconia powder is 0.5 micron to 0.6 micron, wherein the binder is polyvinyl butyral; the dispersant is castor oil; the plasticizer is dibutyl phthalate; the solvent It is ethanol, and the defoaming agent is n-butanol; the mass ratio of binder to zirconia powder is 5:100; the mass ratio of dispersant to zirconia powder is 2:100; the plasticizer and zirconia powder The mass ratio of the solvent to the zirconia powder is 20:100; the mass ratio of the solvent to the zircon...

Embodiment 2

[0071] The preparation process of the cover plate of the induction recognition module in this embodiment is as follows:

[0072] (1) Mix zirconia powder, solvent and dispersant by ball milling for 3 hours, then add binder and plasticizer to continue ball milling for 10 hours, then add defoaming agent, ball mill for 0.5 hours, and finally vacuum defoam for 2 hours, A zirconia ceramic slurry with a viscosity of 7.5 Pa·s and a mass percentage of solid phase of 51.9% was obtained. Among them, the median particle size of the zirconia powder is 0.5 micron to 0.6 micron, and the binder is polyvinyl butyral; the dispersant is glyceryl trioleate; the plasticizer is dibutyl phthalate ester; the solvent is xylene, and the defoaming agent is n-butanol; the mass ratio of the binder to the zirconia powder is 10:100; the mass ratio of the dispersant to the zirconia powder is 0.5:100; the plasticizer and the zirconia powder are 0.5:100; The mass ratio of zirconia powder is 25:100; the mass r...

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Abstract

The invention relates to a zirconia ceramic sheet, a preparation method thereof, a cover plate of an induction identification module, a preparation method and an application thereof. The preparation method of the zirconia ceramic sheet comprises the following steps: cast zirconia ceramic slurry on a release film, and then dry to obtain a casting belt, wherein the casting belt has a bottom surface opposite to the release film and a The outer surface opposite to the bottom surface; the green sheet is cut out from the casting belt, the outer surfaces of the two green sheets are bonded together, and pressed to form a green body; the green body is sintered to obtain a zirconia ceramic sheet. The preparation method of the above zirconia ceramic sheet has low production cost and high production efficiency, and the obtained zirconia ceramic sheet has high bending strength.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a zirconia ceramic sheet and a preparation method thereof, a cover plate of an inductive identification module, a preparation method and application thereof. Background technique [0002] At present, due to its superior mechanical properties and high dielectric constant (30-40), zirconia materials are adopted by more and more mobile phone manufacturers, and mobile phones with fingerprint identification modules with zirconia cover plates have been launched. Among them, the zirconia ceramic cover plate is in the shape of a thin sheet with a thickness of only 0.08-0.20mm. The usual preparation process is to prepare the green sheet by tape casting first, then sinter the green sheet to obtain a ceramic sheet with a thickness of about 0.2-0.4mm, and finally obtain a zirconia ceramic cover sheet of the required thickness by grinding and polishing. However, the green sheet with a thickn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622B28B1/29B28B3/00C04B35/634G06K9/00
CPCC04B35/48C04B35/622C04B35/6342B28B1/29B28B3/003C04B2235/60C04B2235/606G06V40/1306
Inventor 林勇钊向其军谭毅成黎景锋韦灵尧陈强
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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