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Zirconia ceramic and preparation method thereof

A technology of zirconia ceramics and zirconia, which is applied in the field of ceramic materials to achieve the effect of increasing the dielectric constant

Active Publication Date: 2017-06-30
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, zirconia ceramic products on the market, such as ceramic fingerprint covers, put forward certain requirements for their dielectric properties. The demand of pure zirconia ceramics can no longer meet

Method used

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  • Zirconia ceramic and preparation method thereof
  • Zirconia ceramic and preparation method thereof
  • Zirconia ceramic and preparation method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] Such as figure 1 Shown, the preparation method of the zirconia ceramics of an embodiment, comprises the steps:

[0026] Step S110: providing a slurry, the slurry includes titanate and zirconia.

[0027] Among them, the zirconia includes 97%-99.5% of zirconia powder with a particle size of 0.5-0.8 micron and 0.5%-3% of zirconia powder with a particle size of 20-50 nm according to mass percentage. Due to fine-grain strengthening will occur when subjected to hot isostatic pressing at high temperatures, by using 97% to 99.5% of zirconia powder with a particle size of 0.5 micron to 0.8 micron and 0.5% to 3% of zirconia powder with a particle size of 20 nanometers ~50nm zirconia powder can improve strength and dielectric properties.

[0028] Wherein, the particle size of the titanate is 0.1 micron to 0.5 micron. Particles with a particle size of less than 1 micron are ultrafine powders. Due to their small particle size, correspondingly, their specific surface area is large...

Embodiment 1

[0057] The preparation process of the zirconia ceramics of the present embodiment is as follows:

[0058] (1) Weigh zirconia and titania according to the stoichiometric ratio of each element of zirconium titanate, mix zirconia and titania, add in the ball mill jar, and add 0.5% of the total mass of zirconia and titania Dispersant, using deionized water as the ball milling medium, ball milling and mixing in a planetary ball mill at a speed of 300 rpm for 4 hours to obtain a slurry, wherein the dispersant is polyacrylic acid.

[0059] (2) Take out the slurry and bake it at 60°C for 18 hours, pass through a 100-mesh sieve after drying, and then press it into a block.

[0060] (3) Heating the block from room temperature to 1200°C at a heating rate of 2°C / min, and sintering at 1200°C for 2 hours, then cooling naturally to obtain a sintered body, breaking the sintered body to obtain a pulverized material, according to The mass ratio is 60:100:2 Put crushed material, water and polya...

Embodiment 2

[0065] The preparation process of the zirconia ceramics in this example is roughly the same as in Example 1, except that in step (4), the mass ratio of zirconium titanate to zirconia is 4:100.

[0066] According to the test method of Example 1, the dielectric loss tangent, dielectric constant and bending strength of the zirconia ceramics of this example are shown in Table 1.

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Abstract

The invention relates to a zirconia ceramic and a preparation method thereof. The preparation method of the zirconia ceramic comprises the following steps: providing slurry, wherein the slurry comprises titanate and zirconia, the mass ratio of the titanate to the zirconia is (0.01-0.25):1, and the titanate is selected from at least one of zirconium titanate, calcium titanate, strontium titanate, copper calcium titanate and strontium barium titanate; and shaping the slurry, and sequentially performing sintering and hot isostatic pressing treatment to obtain the zirconia ceramic. The zirconia ceramic prepared by the above zirconia ceramic preparation method has a high dielectric constant.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a zirconia ceramic and a preparation method thereof. Background technique [0002] Ceramic materials are widely used in the fields of building materials, appliances, and electronics. Among them, zirconia ceramic materials have excellent characteristics such as high hardness, wear resistance, good toughness, and no electroplating pollution, and are deeply loved by people. At present, zirconia ceramic products on the market, such as ceramic fingerprint covers, put forward certain requirements for their dielectric properties. The needs of pure zirconia ceramics can no longer be met. Contents of the invention [0003] Based on this, it is necessary to provide a preparation method capable of preparing zirconia ceramics with a relatively high dielectric constant. [0004] In addition, a zirconia ceramic is also provided. [0005] A preparation method of zirconia ceramics, comprisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/64
Inventor 韦灵尧向其军谭毅成林勇钊黎景锋陈强
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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