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High-temperature and high-pressure rapid synthesis method of Gd2Zr2O7 pyrochlore ceramic

A gd2zr2o7, high temperature and high pressure technology is applied in the field of high temperature and high pressure rapid synthesis, which can solve the problems of inaccessibility to the actual needs of engineering, low efficiency and high cost, and achieve the effects of shortening preparation time, improving efficiency and strong practicability

Inactive Publication Date: 2012-08-22
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the solid-state reaction synthesis method of pyrochlore is high in cost and low in efficiency, and cannot meet the actual needs of engineering

Method used

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  • High-temperature and high-pressure rapid synthesis method of Gd2Zr2O7 pyrochlore ceramic
  • High-temperature and high-pressure rapid synthesis method of Gd2Zr2O7 pyrochlore ceramic
  • High-temperature and high-pressure rapid synthesis method of Gd2Zr2O7 pyrochlore ceramic

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Experimental program
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Embodiment 1-10

[0037] Embodiment 1-10 of the present invention: a high temperature and high pressure solid phase reaction synthesis method of pyrochlore, including five steps of batching, grinding, drying, dry pressing and high temperature and high pressure synthesis.

[0038] Described batching step presses stoichiometric formula Gd 2-x A x Zr 2 o 7 Take Gd 2 o 3 , ZrO 2 and trivalent element oxide A 2 o 3 Three kinds of raw materials, the trivalent element oxide uses Nd 2 o 3 , then the formula for calculating the mass percentage of Nd is

[0039] W 1 = M Nd M 0 = 144.24 x 144.24 x + 16 × 7 + ( 2 - ...

Embodiment 19-29

[0067] Examples 19-29 of the present invention: a high-temperature, high-pressure solid-phase reaction synthesis method for pyrochlore, including five steps of batching, grinding, drying, dry pressing and sintering at high temperature and high pressure.

[0068] Described batching step presses molecular formula Gd 2-x A x Zr 2-y B y o 7 The ratio of the stoichiometric numbers in is taken as Gd 2 o 3 , ZrO 2 , Trivalent element oxide A 2 o 3 and tetravalent element oxide BO 2 Four raw materials, wherein the trivalent element oxide A 2o 3 and tetravalent element oxide BO 2 Nd 2 o 3 and CeO 2 , then the mass percentage of Nd W 3 and the mass percentage of Ce W 4 respectively

[0069] W 3 = M Nd M 0 = 144.24 x 257.25 ( ...

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Abstract

The invention discloses a high-temperature and high-pressure rapid synthesis method of Gd2Zr2O7 pyrochlore ceramic, which comprises the five steps of: batching, grinding, drying, dry pressing and high-temperature and high-pressure synthesis. The high-temperature and high-pressure rapid synthesis method has the beneficial effects that within the wide pressure and temperature scope, a multi-component oxide mixture is taken as a raw material, the synthesis of a Gd2-xAxZr2-yByO7 (x is more than or equal to 0 but less than or equal to 2, and y is more than or equal to 0 but less than or equal to 2) compound with a pyrochlore structure and the dense sintering of the ceramic is realized at the same time, and the time required is only 15-30 minutes, so that the preparation time of the pyrochlore ceramic is greatly shortened; and compared with the prior art, the time used is shortened by 100 times at least, the efficiency is improved, and the practicability is strong.

Description

technical field [0001] The present invention relates to Gd 2 Zr 2 o 7 Pyrochlore-based ceramics Gd 2-x A x Zr 2-y B y o 7 (0≤x≤2, 0≤y≤2) high-temperature and high-pressure rapid synthesis method, wherein the A and B positions are trivalent and tetravalent cations respectively, which can be rare earth elements or actinide elements. If both A and B are rare earth elements, then Gd 2-x A x Zr 2-y B y o 7 (0<x<2, 0<y<2) ceramic materials have the ability of ion conduction and electron conduction under the action of an external electric field, and can be used as electrolyte materials for high-temperature solid oxide fuel cells; if both A and B are actinide elements , Gd 2-x A x Zr 2-y B y o 7 (0≤x≤2, 0≤y≤2) ceramic materials contain actinide nuclides and become the solidified body of actinide nuclides, which can be used for solidification treatment of transuranic nuclides and α waste, and can also convert U and Pu oxide solid solution to Gd 2 Zr 2 o ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622C04B35/645
Inventor 唐敬友谢华卢喜瑞易发成罗学刚肖正学
Owner SOUTHWEAT UNIV OF SCI & TECH
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