Preparation method of compact zirconia ceramic plunger

A technology of zirconia ceramics and ceramic plungers, which is applied in the field of preparation of high-pressure plunger pump components, can solve the problems of long processing cycle, complex process, and body deformation, so as to inhibit grain growth, expand application range, and improve compactness effect

Active Publication Date: 2011-05-18
SHANGHAI RES INST OF MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since the diameter of the dense zirconia ceramic body is generally greater than 10mm, the wet process not only has a long processing cycle and complicated process, but also easily causes defects such as deformation, cracking, and air bubbles in the body during the process of removing the forming binder.

Method used

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  • Preparation method of compact zirconia ceramic plunger
  • Preparation method of compact zirconia ceramic plunger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The commercially available 3mol% Y 2 o 3 The stable zirconia ceramic granulation powder is added with composite additives containing stearic acid, ultra-fine high-purity alumina, calcium stearate, kerosene and other components, and is formulated according to the following weight percentage formula:

[0025] 3mol% Y 2 o 3 Stable zirconia ceramic granulation powder 97.6%,

[0026] Stearic acid 0.1%,

[0027] Calcium Stearate 0.15%,

[0028] Aluminum oxide 0.02%,

[0029] Kerosene 2.13%,

[0030] Fully mix in a plastic container, and then put it into a special molding mold consisting of an oil-resistant rubber sleeve, a porous cage and a rubber plug with a vacuum interface. After vacuuming, the air content in the mold cavity is reduced; In the hydraulic cylinder of the static press, under the pressure of 200MPa, hold the pressure for 3 minutes to form; at the sintering temperature of 1580°C, hold the heat for 150 minutes, and after precise grinding, the specificatio...

Embodiment 2

[0032] The commercially available 3mol% Y 2 o 3 The stable zirconia ceramic granulation powder is added with composite additives containing aluminum stearate, magnesium stearate, oleic acid and other components, and is prepared according to the following weight percentage formula:

[0033] 3mol% Y 2 o 3 98% stable zirconia ceramic granulation powder,

[0034] Aluminum stearate 0.15%,

[0035] Magnesium Stearate 0.1%,

[0036] Sour Oil 1.85%,

[0037] Fully mix in a plastic container, and then put it into a special molding mold consisting of an oil-resistant rubber sleeve, a porous cage and a rubber plug with a vacuum interface. After vacuuming, the air content in the mold cavity is reduced; In the hydraulic cylinder of the static press, under the pressure of 220MPa, hold the pressure for 4 minutes to form; at the sintering temperature of 1585°C, hold the heat for 180 minutes, and after precise grinding, the specification is φ16×160 dense zirconia ceramic plunger. , to a...

Embodiment 3

[0039] The commercially available 3mol% Y 2 o 3 The stable zirconia ceramic granulation powder is added with composite additives containing stearic acid, magnesium stearate, oleic acid and other components, and is prepared according to the following weight percentage formula:

[0040] 3mol% Y 2 o 3 98% stable zirconia ceramic granulation powder,

[0041] Stearic acid 0.1%,

[0042] Magnesium Stearate 0.1%,

[0043] Sour Oil 1.8%,

[0044] Fully mix in a plastic container, and then put it into a special molding mold consisting of an oil-resistant rubber sleeve, a porous cage and a rubber plug with a vacuum interface. After vacuuming, the air content in the mold cavity is reduced; In the hydraulic cylinder of the static press, under the pressure of 240MPa, the pressure is maintained for 6 minutes; at the sintering temperature of 1595°C, the temperature is maintained for 180 minutes, and the specification is φ22.20×300 dense zirconia ceramics after precise grinding. Plunger,...

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Abstract

The invention relates to a preparation method of a compact zirconia ceramic plunger. The preparation method comprises the following steps: fully mixing zirconia ceramic granulated powder with a compound additive; placing the obtained mixture in a die for isostatic pressing; sintering the molded sample into a compact zirconia ceramic plunger blank; and finally grinding the blank into the ceramic plunger with precise size. Compared with the prior art, by utilizing the zirconia plunger material and the preparation method thereof provided by the invention, the compactness, the forming efficiency and the finished product ratio of the ceramic plunger are effectively improved. A high-pressure plunger pump manufactured by the compact zirconia ceramic plunger has the advantages of long service life, wear resistance, corrosion resistance, expanded application range, and shortened time for maintaining and replacing a high-pressure plunger and a sealing bush in the case of shutdown, thus saving engineering operating cost.

Description

technical field [0001] The invention relates to a preparation method of a high-pressure plunger pump component, in particular to a preparation method of a dense zirconia ceramic plunger. Background technique [0002] The plunger is one of the core components of the high-pressure plunger pump. It uses its wear-resistant and corrosion-resistant characteristics, and cooperates with the high-pressure sealing ring to make the water or liquid phase working medium form a high-pressure fluid during reciprocating motion. The general shape of the plunger is composed of a solid or hollow rod-shaped structure with an aspect ratio of 10-20. Due to the high working pressure, it will reciprocate friction and impact push-pull with the sealing material under high pressure for a long time, so not only the hardness of the material constituting the plunger is required. High, good toughness, and requires high dimensions and surface finish. The plunger material is usually made of wear-resistant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
Inventor 谢建林
Owner SHANGHAI RES INST OF MATERIALS CO LTD
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