Preparation method of composite zirconia ceramic backboard

A zirconia ceramic and zirconia technology, which is applied in the field of preparation of composite zirconia ceramic backplanes, can solve the problems of high energy consumption, low product yield, limited production capacity, etc., and achieve simple and controllable process, high-efficiency preparation, and compact structure Effect

Active Publication Date: 2018-11-16
苏州山人纳米科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production and processing process of the composite zirconia ceramic backplane can be divided into four major links: material batching, molding, sintering, and finishing; among them, the sintering process generally adopts high-temperature sintering technology, which not only takes a long time and consumes a lot of energy, but also the quality of the product. It is more difficult to control and the yield rate of the obt

Method used

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  • Preparation method of composite zirconia ceramic backboard
  • Preparation method of composite zirconia ceramic backboard
  • Preparation method of composite zirconia ceramic backboard

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Embodiment one

[0028] A method for preparing a composite zirconia ceramic back plate, comprising the following steps:

[0029] (1) Pour the composite zirconia granulation powder into the mold of the three-dimensional mobile phone backplane, and hold the pressure at 200Mpa for 30s to form the dry press. Among them, the composition of the composite zirconia granulation powder is shown in Table 1;

[0030] (2) Place the model obtained in step (1) in the air and degrease at 470°C for 2.0 hours to prepare a green body;

[0031] (3) placing the green body obtained in step (2) in air at 930° C. for 50 seconds;

[0032] (4) Place platinum electrodes on both sides of the biscuit obtained in step (3) and pass direct current, increase the voltage linearly at a rate of 60V / s until flashing occurs, keep the current at 950A and maintain it for 20s, and then cool down to room temperature The sintered body of the back plate can be obtained.

[0033] Field emission electron microsc...

Example Embodiment

[0034] Embodiment two

[0035] A method for preparing a composite zirconia ceramic back plate, comprising the following steps:

[0036] (1) Pour the composite zirconia granulation powder into the mold of the three-dimensional mobile phone backplane, and hold the pressure at 220Mpa for 20s to form the dry press. Among them, the composition of the composite zirconia granulation powder is shown in Table 1;

[0037] (2) Place the model obtained in step (1) in the air and degrease at 400°C for 2.5 hours to prepare a green body;

[0038] (3) Place the biscuit obtained in step (2) in the air and bake at 1000°C for 40s;

[0039] (4) Place platinum electrodes on both sides of the biscuit obtained in step (3) and pass direct current, increase the voltage linearly at a rate of 20V / s until flashing occurs, keep the current at 1000A for 30s, and then cool down to room temperature The sintered body of the back plate can be obtained.

[0040] Field emission electron microscopy (SEM) was p...

Example Embodiment

[0041] Embodiment Three

[0042] A method for preparing a composite zirconia ceramic back plate, comprising the following steps:

[0043] (1) Pour the composite zirconia granulation powder into the three-dimensional mobile phone backplane mold, and hold the pressure at 230Mpa for 40 seconds to form dry pressing. Among them, the composition of the composite zirconia granulation powder is shown in Table 1;

[0044] (2) Place the model obtained in step (1) in the air and degrease at 500°C for 3.0 hours to prepare a green body;

[0045] (3) placing the green body obtained in step (2) in air at 900° C. for 30 seconds;

[0046] (4) Place platinum electrodes on both sides of the biscuit obtained in step (3) and pass direct current, increase the voltage linearly at a rate of 100V / s until flashing occurs, then keep the current constant at 800A for 40s, and cool down to room temperature A back plate sintered body can be obtained.

[0047] Field emission electron microscopy (SEM) was ...

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Abstract

The invention discloses a preparation method of a composite zirconia ceramic backboard. The method comprises steps as follows: composite zirconia granulation powder is poured into a backboard mold andsubjected to dry-pressing molding, an obtained model is subjected to degreasing, high-temperature roasting and flash burning, and a backboard sintered body can be prepared. The preparation method ofthe composite zirconia ceramic backboard is combined with high-pressed sintering and flash burning technologies, the temperature of the high-temperature roasting of the method is lower than that of the high-pressed sintering technology by 500-700 DEG C, the total time for high-temperature roasting does not exceed two minutes, and the obtained backboard sintered body not only has mechanical properties equivalent to those of a product obtained with the high-pressed sintering technology, but also has the characteristics of being compact in structure and free of microscopic hole defects; besides,the method further has the advantages of simple and controllable process, efficient preparation and relative energy conservation, and is suitable for industrial production.

Description

technical field [0001] The invention belongs to the technical field of ceramic backboards, and in particular relates to a preparation method of a composite zirconia ceramic backboard. Background technique [0002] With the development of communication technology and mobile phone technology, the era of 5G and wireless charging is coming, but both of them have higher requirements on the material of the mobile phone backplane, and the shielding effect on electromagnetic signals needs to be as small as possible. Therefore, non-metallic backplane materials It will become an inevitable choice for future mobile phones. [0003] Composite zirconia ceramics have good properties such as hardness, flexural strength, toughness and thermal conductivity, and have obvious advantages over non-metallic materials such as plastic and glass backplanes; in addition, composite zirconia ceramics are beautiful and skin-friendly. It is expected to be applied to high-end mobile phone products. The ...

Claims

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Application Information

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IPC IPC(8): C04B35/488C04B35/119C04B35/622
CPCC04B35/119C04B35/4885C04B35/622C04B2235/3217C04B2235/3225C04B2235/3244C04B2235/96C04B2235/785C04B2235/78C04B2235/77C04B2235/666C04B2235/656C04B2235/6567C04B2235/6583C04B2235/602
Inventor 贾建平周晖雨
Owner 苏州山人纳米科技有限公司
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