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Lithium zirconate ceramic ball tritium breeding material and preparation method thereof

A technology of zirconia ceramic balls and ceramic balls, applied in the field of nuclear energy, can solve the problems of waste and high breakage rate, and achieve the effect of good density and high thermal conductivity

Inactive Publication Date: 2013-06-26
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This method has high efficiency in preparing balls, but in the process of ball sintering, the damage rate is also high, and the waste is serious

Method used

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  • Lithium zirconate ceramic ball tritium breeding material and preparation method thereof

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Effect test

Embodiment 1

[0023] (1) Mix 0.11 mol of lithium carbonate, 0.1 mol of zirconia, and 100 ml of ethanol; use zirconia ceramic balls as grinding balls for the mixed solution, and mix on a ball mill for 4 hours. Dry in an oven for 4 hours at 80°C.

[0024] (2) Sinter the mixture in the sintering furnace. Raise the temperature to 600°C in two hours, keep the temperature for 3 hours, then raise the temperature to 900°C in two hours, and keep the temperature for 24 hours. Then cool naturally. After taking it out, use zirconia ceramic balls to grind powder on a ball mill, grind for 4 hours, and sieve.

[0025] (3) Put the ceramic powder into the rubber mold, and pressurize the rubber mold on the isostatic press with a pressure of 150 MPa.

[0026] (4) Sinter the isostatically pressed ceramic balls in a high-temperature furnace at a temperature of 1200-1350 °C and a holding time of 5-8 hours. After heat preservation, the material is cooled with the furnace, and after cooling to room temperature...

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Abstract

The invention belongs to the technical field of nuclear energy and particularly relates to a lithium zirconate ceramic ball tritium breeding material and a preparation method thereof. According to the preparation method disclosed by the invention, an isostatic pressing method is adopted for preparing ceramic balls, and the density is higher than those prepared by rotational molding, wet process dehydration molding and wet process ZrO2 addition molding. The ceramic balls prepared by other methods are molded under the situation that external pressure does not exist, and the degree of compaction of components is lower than that of the isostatic pressing method. Simultaneously, the structure can release carbon dioxide during the sintering process, and the density of the balls is lower; and however, in the preparation method disclosed by the invention, powder is firstly prepared and can realize full reaction and release the carbon dioxide, and when the sintering of the ceramic balls is performed in the second step, the released carbon dioxide is very little, and the density of the prepared lithium zirconate ceramic balls is higher. In addition, if the density of the ceramic balls needs to be improved continuously, the pressure for isostatic pressing can be improved, and then the density of the obtained ceramic balls can be increased.

Description

technical field [0001] The invention belongs to the technical field of nuclear energy, and in particular relates to a lithium zirconate ceramic spherical tritium breeding material and a preparation method thereof. Background technique [0002] Solid tritium breeding cladding material is one of the key materials for commercial nuclear fusion reactors. Its preparation technology and thermal physical properties directly determine the in-reactor behavior of the cladding, which is the necessary basis for the design and development of tritium breeding cladding. [0003] Magnetic confinement nuclear fusion energy is one of the technological options for the sustainable development of human beings in the future. According to the current development status of international magnetic confinement fusion technology, the commercial technology of magnetic confinement nuclear fusion reactor marked by Tokamak fusion reactor is extremely promising. Substantial progress may be made in the first...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/622
Inventor 盛选禹周志伟司文捷彭天骥
Owner TSINGHUA UNIV
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