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Ceramic containing pyrochlore phase zirconic acid gadolinium powder and preparation method of ceramic

A technology of phase zirconate and pyrochlore, which is applied in the field of ceramics and its preparation, can solve the problems of unsatisfactory structure of gadolinium zirconate ceramics, difficulty in preparation of gadolinium zirconate ceramics, unsatisfactory mechanical properties at room temperature, etc., and achieve sintering time and production The effect of short cycle, good compactness and easy operation

Inactive Publication Date: 2016-01-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the difficulties in the preparation of gadolinium zirconate ceramics in the prior art. The prepared gadolinium zirconate ceramics have unsatisfactory structures (obvious grain boundaries, large grains, large pores, high porosity, etc.), and unsatisfactory mechanical properties at room temperature. And other issues

Method used

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  • Ceramic containing pyrochlore phase zirconic acid gadolinium powder and preparation method of ceramic
  • Ceramic containing pyrochlore phase zirconic acid gadolinium powder and preparation method of ceramic
  • Ceramic containing pyrochlore phase zirconic acid gadolinium powder and preparation method of ceramic

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Embodiment 1

[0037] A method for preparing ceramics containing pyrochlore phase gadolinium zirconate powder, comprising the following steps:

[0038] (1) Mixing of ingredients: the following by weight percentage, with gadolinium zirconate 20% (average particle size 35nm), gadolinium oxide 45% (150 mesh), zirconia 30% (150 mesh), sintering aid yttrium oxide (200 mesh ) 5%, carry out its thorough mixing, obtain the powder body after mixing.

[0039] (2) Grinding and drying: Add absolute ethanol to the mixed powder, grind for 2 hours until the particles of the mixture are 150 mesh, put it into a constant temperature blast drying oven at 60-90°C for 1 hour to obtain a composite powder.

[0040] (3) Cold isostatic granulation: The composite powder is pressed under a pressure of 200MPa by cold isostatic pressing, taken out, crushed, and passed through a 1-4mm square hole sieve to obtain uniform granules.

[0041] (4) Raw material forming: Under the pressure condition of 15 MPa, the uniform part...

Embodiment 2

[0046]A method for preparing ceramics containing pyrochlore phase gadolinium zirconate powder, comprising the following steps:

[0047] (1) Mixing of ingredients: the following by weight percentage, with gadolinium zirconate 80% (average particle size 35nm), gadolinium oxide 9% (150 mesh), zirconia 6% (150 mesh), sintering aid yttrium oxide (200 mesh ) 5%, carry out its thorough mixing, obtain the powder body after mixing.

[0048] (2) Grinding and drying: Add absolute ethanol to the mixed powder, grind for 2 hours until the particles of the mixture are 150 mesh, put it into a constant temperature blast drying oven at 60-90°C for 1 hour to obtain a composite powder.

[0049] (3) Cold isostatic granulation: The composite powder is pressed under a pressure of 200MPa by cold isostatic pressing, taken out, crushed, and passed through a 1-4mm square hole sieve to obtain uniform granules.

[0050] (5) Raw material forming: Under the pressure condition of 15 MPa, the uniform particl...

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Abstract

The invention discloses ceramic containing pyrochlore phase zirconic acid gadolinium powder. The ceramic is prepared from the following raw materials in percentage by weight: 10-100% of zirconic acid gadolinium, 0-90% of at least one of gadolinium oxide and zirconium oxide and 0-5% of a sintering additive. The invention further discloses a preparation method of the ceramic. The ceramic containing pyrochlore phase zirconic acid gadolinium powder has excellent properties such as high thermal stability, good sintering density, uniform microstructure and the like, and can be applied to catalysts, solid electrolyte, curing of high-level wastes, high-temperature thermal barrier coatings and the like.

Description

technical field [0001] The invention relates to a ceramic and a preparation method thereof, in particular to a ceramic containing pyrochlore phase gadolinium zirconate powder and a preparation method thereof. This ceramic is mainly used in catalysts, solid electrolytes, solidification of high-level radioactive waste, and high-temperature thermal barrier coating materials. Background technique [0002] Gadolinium zirconates (Gadolinium zirconates) ceramics is a ceramic material with good comprehensive performance and high temperature resistance. It has excellent physical and chemical properties and is widely used in catalysts, solid electrolytes, solidification of high-level radioactive waste, high-temperature thermal barrier coating materials, etc. Its structure usually has two types of pyrochlore phase and fluorite phase. [0003] Gadolinium zirconate ceramics containing pyrochlore phase are selected as an excellent material for solidifying high-level radioactive waste be...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/50C04B35/622
Inventor 卢喜瑞舒小艳易发成丁艺毛雪丽樊龙段涛谢忆
Owner SOUTHWEAT UNIV OF SCI & TECH
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