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A kind of preparation method of lithium orthosilicate spherical shell for tritium propagation

A lithium orthosilicate and tritium breeding technology, applied in the field of tritium breeding materials, can solve the problems of insufficient strength, cracking of orthosilicate spherical shell samples, uneven shrinkage, etc., and achieve uniform shrinkage, not easy to pulverize and break, and smooth inner and outer walls Effect

Active Publication Date: 2022-04-29
广州赛隆增材制造有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, orthosilicate spherical shells prepared by means of hot pressing sintering, injection molding, etc. will bring problems such as sample cracking, uneven shrinkage, and insufficient strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention relates to a preparation method of a lithium orthosilicate spherical shell for tritium multiplication, comprising the following steps: step 1, adding a liquid binder to the lithium orthosilicate powder, and then placing it in a mixer for stirring at a stirring speed of 5r / min ~ 20r / min, the stirring time is 0.5h ~ 1h, and the viscous lithium orthosilicate powder group with good formability is obtained; the mass ratio of the liquid binder to the powder is 1:2.5~9.

[0018] The particle size of the lithium orthosilicate powder is 1 μm to 100 μm, the particle size distribution D50 is less than 10 μm, and the purity is 99.9%; the lithium orthosilicate powder in this particle size range can ensure its sintering activity, and it is easy to obtain silicon with higher strength. Lithium acid spherical shell, and the pore size of the spherical shell is small and uniform.

[0019] The liquid binder is prepared from sodium polyacrylate or polyvinyl alcohol or terpine...

Embodiment 1

[0023] Embodiment 1: The present invention relates to a preparation method of a lithium orthosilicate spherical shell for tritium propagation, comprising the following steps: Step 1, adding 100 g of a liquid binder to 250 g of lithium orthosilicate powder, and then placing it in a mixer for stirring , the stirring speed is 5r / min ~ 20r / min, the stirring time is 0.5h ~ 1h, and the viscous lithium orthosilicate powder group with good formability is obtained.

[0024] The liquid binder is prepared from sodium polyacrylate and absolute ethanol at a concentration of 0.6 g / L.

[0025] Step 2, put the lithium orthosilicate powder group obtained in step 1 into a mould, and obtain a lithium orthosilicate spherical shell green body by compression molding; Step 3, place the lithium orthosilicate spherical shell green body obtained in step 2 Dry in a constant temperature blower box at 60°C for 12 hours; step 4, sinter the lithium orthosilicate spherical shell green body obtained after dry...

Embodiment 2

[0029] Embodiment 2: The present invention relates to a preparation method of a lithium orthosilicate spherical shell for tritium propagation, comprising the following steps: Step 1, adding 100 g of a liquid binder to 600 g of lithium orthosilicate powder, and then placing it in a mixer for stirring , the stirring speed is 5r / min ~ 20r / min, the stirring time is 0.5h ~ 1h, and the viscous lithium orthosilicate powder group with good formability is obtained.

[0030] The liquid binder is prepared from polyvinyl alcohol and absolute ethanol at a concentration of 1.2 g / L.

[0031] Step 2, put the lithium orthosilicate powder group obtained in step 1 into a mould, and obtain a lithium orthosilicate spherical shell green body by compression molding; Step 3, place the lithium orthosilicate spherical shell green body obtained in step 2 Drying in a constant temperature blower box at 80°C for 10 hours; step 4, sintering the lithium orthosilicate spherical shell green body obtained after...

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Abstract

The invention provides a preparation method of a lithium orthosilicate spherical shell for tritium multiplication, comprising the following steps: step 1, adding a liquid binder to the lithium orthosilicate powder, and then placing it in a mixer and stirring evenly to obtain a spherical shell with good formability. The viscous lithium orthosilicate powder group; the mass ratio of the liquid binder to the powder is 1:2.5~9; step 2, the lithium orthosilicate powder group obtained in step one is packed into the mould, through Press molding to obtain the lithium orthosilicate spherical shell green body; step 3, drying the lithium orthosilicate spherical shell green body obtained in step 2; step 4, drying the lithium orthosilicate spherical shell green body obtained in step 3 Carry out sintering in a sintering furnace to obtain lithium orthosilicate spherical shell materials; the lithium orthosilicate spherical shells produced by the present invention have high strength, are not easy to be crushed during use, and shrink evenly, and are suitable for TBM module Li 4 SiO 4 Simulation verification of tritium multiplication in ceramic microspheres.

Description

technical field [0001] The invention relates to the field of tritium breeding materials, in particular to a method for preparing lithium orthosilicate spherical shells for tritium breeding. Background technique [0002] With the rapid development of the economy, the society's demand for energy is rapidly increasing, and the energy problem is a major issue that human beings need to solve in the 21st century. Nuclear fusion energy is considered to be one of the most likely ways to solve human energy problems because of its inherent safety, cleanliness and abundance of fuel reserves. [0003] There is a cladding outside the fusion drive of a fusion reactor or fusion-fission hybrid reactor. One of the purposes of the cladding is to produce enough nuclear fuel, tritium. The tritium breeding agent in the cladding needs to meet the requirements of high tritium breeding ratio, excellent thermal conductivity, mechanical properties, tritium release performance, irradiation performanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/16C04B35/622G21B1/11
CPCC04B38/00C04B35/16C04B35/622G21B1/11Y02E30/10
Inventor 龙学湖郭瑜汪强兵潘彦明时明军胡涵
Owner 广州赛隆增材制造有限责任公司