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Preparation method of lithium-based ceramic microsphere

A ceramic microsphere, lithium-based technology, applied in the field of nuclear fusion, can solve the problems of complex additives, high cost, poor sphericity, etc., and achieve the effects of small mass reduction, simple raw materials, and volume reduction

Inactive Publication Date: 2010-10-13
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are preparation methods such as gel injection molding, wet method (with PVA or alginate), melt spraying, etc., but there are disadvantages such as complex additives, poor sphericity, high cost, etc., and it is difficult to meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Li 2 TiO 3 Preparation of microspheres

[0025] (1) Choose agar powder as the binder and water as the solvent. Combine both with Li 2 TiO 3 Powder mixing, wherein agar powder accounts for 1wt% of the total mass, water accounts for 66wt% of the total mass, Li 2 TiO 3 The powder accounts for 33wt% of the total mass. The mixed solution was ball milled on a planetary ball mill at a speed of 350 rpm for 30 minutes to obtain a uniform slurry.

[0026] (2) Add 0.08% of antifoaming agent isooctyl alcohol to the homogeneous slurry, and then put it in a water bath at 85° C. for 30 minutes, and keep stirring to prepare a sol.

[0027] (3) Drop the sol into the methyl silicone oil at 20°C through the dispersing device.

[0028] (4) After standing for 30 minutes, the microspheres were washed, dried, and sintered to obtain 0.5-1.5mm Li 2 TiO 3 Microspheres.

Embodiment 2

[0030] Li 4 SiO 4 Preparation of microspheres

[0031] (1) Choose agar powder as the binder and water as the solvent. Combine both with Li 4 SiO 4 Powder mixing, wherein agar powder accounts for 1wt% of the overall mass, water accounts for 64wt% of the overall mass, Li 4 SiO 4 The powder accounts for 35wt% of the total mass. The mixed solution was ball milled on a planetary ball mill at a speed of 350 rpm for 30 minutes to obtain a uniform slurry.

[0032] (2) Add 0.09% of antifoaming agent isooctyl alcohol to the homogeneous slurry, and then put it in a water bath at 85° C. for 30 minutes, and keep stirring to obtain a sol.

[0033] (3) Drop the sol into -20°C methyl silicone oil through a dispersing device.

[0034] (4) After standing for 30 minutes, the microspheres were washed, dried, and sintered to obtain 0.5-1.5mm Li 4 SiO 4 Microspheres.

Embodiment 3

[0036] LiAlO 2 Preparation of microspheres

[0037] (1) Choose agar powder as the binder and water as the solvent. Combine both with LiAlO 2 Powder mixing, wherein agar powder accounts for 1.2wt% of the total mass, water accounts for 75.8wt% of the total mass, LiAlO 2 The powder accounts for 23.0wt% of the total mass. The mixed solution was ball milled on a planetary ball mill at a speed of 350 rpm for 30 minutes to obtain a uniform slurry.

[0038] (2) Add 0.01% of antifoaming agent isooctyl alcohol to the homogeneous slurry, and then put it in a water bath at 85° C. for 30 minutes, and keep stirring to obtain a sol.

[0039] (3) Drop the sol into the methyl silicone oil at 0°C through the dispersing device.

[0040] (4) After standing for 30 minutes, the microspheres were washed, dried, and sintered to obtain 0.5-1.5mm LiAlO 2 Microspheres.

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PUM

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Abstract

The invention provides a preparation method of a lithium-based ceramic microsphere, which is mainly used for preparing a tritium breeder in a fusion reactor blanket. The preparation method comprises the following steps: mixing a binder, water and ceramic powder to obtain uniform slurry by ball milling; adding a defoamer, heating in water bath and then forming sol; dripping into a medium mutually exclusive with water by a dispersing device; after the slurry is dispersed in the medium, forming micro-spherical gel; and washing, drying and sintering the microsphere so as to obtain the lithium-based ceramic microsphere. The preparation method of the invention has simple raw material, convenient forming and low cost, and the prepared ceramic microsphere has good sphericity and internal pore structure.

Description

technical field [0001] The invention belongs to the field of nuclear fusion, and in particular relates to a preparation method of lithium-based ceramic microspheres, which are mainly used in the preparation of tritium multiplication agents in the cladding of fusion reactors. Background technique [0002] In today's society where energy is increasingly scarce and the environment is deteriorating, clean and efficient fusion energy has attracted much attention. The fuel used in fusion reactors is deuterium-tritium gas, of which tritium is present in very small amounts in nature. In order to solve the problem of tritium production and replenishment, the best way is to realize the tritium self-sustainment of the fusion reactor itself through the tritium breeding cladding. Tritium multiplication is based on the nuclear reaction of neutrons with lithium: [0003] 6 Li+n= 3 H+ 4 He+4.5MeV [0004] 7 Li+n= 3 H+ 4 He+n'-2.9MeV [0005] Li-rich tritium breeders can be divided...

Claims

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Application Information

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IPC IPC(8): C04B35/622G21B1/11C04B35/462C04B35/16C04B35/44C04B35/48
CPCY02E30/10
Inventor 张迎春吴泽双廖璐林芳弘万秀娟葛昌纯
Owner UNIV OF SCI & TECH BEIJING
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