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Zirconia base ceramic formula fineness composition for preparing cylinder jacket

A technology composed of zirconia base and particle size, applied in the field of structural ceramics, can solve the problems of long production cycle, high firing temperature, low service life, etc., and achieve the effects of improving firing yield, improving fracture toughness and reducing shrinkage.

Inactive Publication Date: 2003-05-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

Due to the use of grouting technology and secondary firing, this kind of ceramic material has the disadvantages of long production cycle, complicated process, high firing temperature, etc., and the service life that can be achieved is still relatively low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0008] Weigh 50 kg of zirconia powder according to the formula, of which 35 kg is fine powder below 0.5 μm, 15 kg is coarse powder with an average particle size of about 1 μm, 2.54 kg of yttrium oxide, 350 grams of magnesium oxide, 1.8 kg of aluminum oxide, add water 36.5 kilograms, 547 grams of ammonium polyacrylate, mixed by ball milling, granulated, isostatically pressed to form a cylinder liner, and fired at 1490 ° C for 3 hours. The obtained cylinder liner material has a strength of 600MPa and a fracture toughness of 12Mpam 1 / 2 , After the inner and outer circles of the ceramic lining are processed and assembled with the corresponding metal jacket, the service life can exceed 2400 hours.

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PUM

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Abstract

The grain size composition in zirconia base ceramic formula for preparing cylinder casing belongs t the field of structure ceramic preparation technology, and the grain size of main component zirconia powder body in the ceramic formula for preparing cylinder casing includes: one kind of 60-80 wt% of zirconia powder boby whose average grain size is 0.2-0.5 micrometer, and another kinds of 20-40 wt% of zirconia powder body whose average grain size is 0.6-1.2 micrometer, in the zirconia powder body 2-3 mol% of yttrium oxide, 0.5-5 mol% of magnesium oxide, 4-15 wt% of alumina and proper quantity of dispersing agent are added, and undergone the processes of ball-grinding, mixing, spray-granulating, isostatic pressure forming and firing at 1460-1520 deg.c so as to obtain the invented ceramic cylinder casing whose service life is above 2400 hr.

Description

technical field [0001] The invention relates to the particle size composition in the formulation of zirconia-based ceramics for preparing the inner liner of the cylinder liner for the oil field drilling pump. It belongs to the field of structural ceramics. Background technique [0002] Drilling pump is an important equipment for transporting drilling mud and taking bottom rock debris out of the well during oilfield drilling. During the use process, it is affected by the wear and corrosion of sandy and alkaline mud, and its cylinder liner is easy to wear and fail. Its frequent replacement or maintenance seriously affects the drilling production efficiency. [0003] The existing cylinder liners are mostly made of metal materials. In order to improve the service life of cylinder liners, the patent "EP.162.284.A" proposes ceramic cylinder liners made of 96 alumina, which can reduce the life of traditional metal cylinder liners from 200 Hours extended ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/488C04B35/622F04B53/16
Inventor 杨正方袁启明刘家臣李金有葛志平李鸿祥
Owner TIANJIN UNIV
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