Zirconia ceramic, preparation method thereof, ceramic plunger and plunger pump

A zirconia ceramic, zirconia technology, applied in pump components, mechanical equipment, variable capacity pump components, etc., can solve the problem that the liquid medium pressure is difficult to meet the design requirements, the working efficiency of the plunger pump is reduced, and the internal structure is not good. Uniformity and other problems, to achieve the effect of fine grains, low porosity and good toughness

Active Publication Date: 2017-12-08
SHENZHEN SUNTECH ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the current ceramic plungers have problems of low strength, poor toughness, uneven internal structure, high porosity, and poor surface finish, which easily lead to poor sea

Method used

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  • Zirconia ceramic, preparation method thereof, ceramic plunger and plunger pump
  • Zirconia ceramic, preparation method thereof, ceramic plunger and plunger pump

Examples

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preparation example Construction

[0026] Such as figure 1 Shown, the preparation method of the zirconia ceramics of one embodiment, comprises the following steps:

[0027] Step S110: providing ceramic powder.

[0028] Among them, in terms of mass percentage, the ceramic powder is composed of the following components: 94% to 96% of zirconia, 3.5% to 5% of yttrium trioxide, 0.2% to 1% of aluminum oxide and 0.05% %~0.2% titanium dioxide.

[0029] Among them, the median particle size of zirconia (D 50 ) is 0.1 micron to 0.5 micron. If the particle size of zirconia is too large, it will easily lead to a large grain size, which is not conducive to improving the strength and toughness. If the particle size of the powder is too fine, the powder is likely to agglomerate and generate air bubbles, which is not conducive to the preparation of gel casting slurry, resulting in more defects in gel casting molding. Zirconia with this particle size is conducive to the formation of a relatively stable and uniform slurry, w...

Embodiment 1

[0055] The preparation process of the ceramic plunger of the present embodiment is as follows:

[0056] (1) Provide ceramic powder. According to the mass percentage, the ceramic powder is composed of the following components: 96% zirconia, 3.5% yttrium oxide, 0.4% aluminum oxide and 0.1% titanium dioxide , wherein the median particle size of the zirconia is controlled to be 0.1 micron to 0.5 micron.

[0057] (2) dissolving the organic monomer and cross-linking agent in deionized water to obtain a premix; adding the premix to a ball mill tank, then adding ceramic powder, dispersant and plasticizer to ball mill for 22 hours to obtain a premix; Pour the primary mixture into a container, vacuum defoam for 60 minutes, stir and add catalyst and initiator to obtain slurry. Among them, the organic monomer is acrylamide, and the mass ratio of the organic monomer to the ceramic powder is 4:100; the cross-linking agent is N,N-dimethylacrylamide, and the mass ratio of the cross-linking a...

Embodiment 2

[0065] The preparation process of the ceramic plunger of the present embodiment is as follows:

[0066] (1) Ceramic powder is provided. According to the mass percentage, the ceramic powder is composed of the following components: 95% zirconia, 4.5% yttrium oxide, 0.4% aluminum oxide and 0.1% titanium dioxide , wherein the median particle size of the zirconia is controlled to be 0.1 micron to 0.5 micron.

[0067] (2) dissolving the organic monomer and cross-linking agent in deionized water to obtain a premix; adding the premix to a ball mill tank, then adding ceramic powder, a dispersant and a plasticizer to ball mill for 20 hours to obtain a premix; Pour the primary mixture into a container, vacuum defoam for 30 minutes, stir and add a catalyst and an initiator to obtain a slurry. Among them, the organic monomer is methylol acrylamide, and the mass ratio of the organic monomer to the ceramic powder is 4:100; the crosslinking agent is N,N-dimethylacrylamide, and the mass ratio...

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Abstract

The invention relates to zirconia ceramic, a preparation method thereof, a ceramic plunger and a plunger pump. The preparation method of the zirconia ceramic comprises the following steps: providing ceramic powder, wherein the ceramic powder contains the following components in percentage by weight: 94%-96% of zirconia, 3.5-5% of yttrium sesquioxide, 0.2%-1% of aluminum sesquioxide and 0.05%-0.2% of titanium dioxide, and the median particle diameter of zirconium dioxide is 0.1-0.5 micron; mixing the ceramic powder, an organic monomer, a cross-linking agent, and aid, a catalyst, an initiator and water, so as to obtain slurry; carrying out injection molding on the slurry, and carrying out curing demolding, so as to obtain a blank; and sintering the blank, so as to obtain the zirconia ceramic. The zirconia ceramic prepared by virtue of the preparation method is relatively high in strength, relatively low in porosity and relatively good in tenacity and has a relatively uniform internal structure; and after being polished, the zirconia ceramic has relatively high surface smoothness.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a zirconia ceramic and a preparation method thereof, a ceramic plunger and a plunger pump. Background technique [0002] The plunger is one of the core components of the high-pressure plunger pump. It reciprocates in the pump through the cooperation of the high-pressure sealing ring, so that the water or liquid medium forms a high-pressure fluid. In order to achieve high pressure in the pump, the plunger must fit closely with the inner wall of the cylinder, which requires precise dimensions and high surface finish of the plunger. Moreover, the plunger has been subjected to reciprocating friction in the cylinder body under high pressure for a long time, which requires the material forming the plunger to have high hardness and good toughness. [0003] The previous plunger material is usually made of wear-resistant metal, but in the process of use, the metal material is easily corr...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/645F04B53/14
CPCC04B35/48C04B35/622C04B35/6455C04B2235/3217C04B2235/3225C04B2235/3232C04B2235/6562C04B2235/6567C04B2235/661C04B2235/96F04B53/14
Inventor 梅心涛向其军谭毅成
Owner SHENZHEN SUNTECH ADVANCED CERAMICS
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