Method for quickly manufacturing Li2TiO3 tritium breeding small balls

A technology of tritium multiplication and small balls, which is applied in the field of 3D printing, can solve the problems of high requirements, poor experimental repeatability, and wide particle size distribution of small balls, and achieve the effect of uniform particle size distribution, high density, and fine grains

Active Publication Date: 2014-11-12
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the wet method has high requirements on the operator and the caliber of the needle tube, the rate of pellet formation is not high, the experiment repeatability is poor, and the particle size distribution of the pellets is wide, so it is difficult to realize the automation and mass production of pellets

Method used

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  • Method for quickly manufacturing Li2TiO3 tritium breeding small balls
  • Method for quickly manufacturing Li2TiO3 tritium breeding small balls
  • Method for quickly manufacturing Li2TiO3 tritium breeding small balls

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 25g of Li 2 TiO 3 The powder and 2.78g of binder powder are evenly mixed (the binder powder is made of epoxy resin, stearic acid or nylon), spread on the workbench of the 3D printing equipment, and then the three-dimensional model of the ball (diameter 4mm , STL format) into the system of the 3D printing equipment, set the working parameters of the equipment (laser power: 20W, laser beam diameter: 200μm, scanning distance: 200μm, scanning speed: 2000mm / s), and start scanning layer by layer. The obtained pellets were transferred to a cold isostatic press, and the applied pressure was 300 MPa, and the pressure was maintained for 30 minutes to obtain relatively dense pellets. Then the pellets are moved into a resistance furnace for debinding treatment. After cooling, they are sintered in a high-temperature furnace at a sintering temperature of 850°C and a holding time of 2 hours to obtain Li 2 TiO 3 Ball entity.

[0027] figure 2 It is a schematic diagram of the proc...

Embodiment 2

[0032] 25g of Li 2 TiO 3 Mix the powder and 6.25g of binder powder evenly (the material used for the binder powder is epoxy resin, stearic acid or nylon), spread it on the workbench of the 3D printing equipment, and then put the three-dimensional model of the ball (diameter 4mm , STL format) into the system, set the equipment working parameters (laser power: 20W, laser beam diameter: 200μm, scanning distance: 200μm, scanning rate: 2000mm / s), and start scanning layer by layer. The obtained pellets were transferred to a cold isostatic press, and the applied pressure was 300 MPa, and the pressure was maintained for 30 minutes to obtain relatively dense pellets. Then the pellets are moved into a resistance furnace for debinding treatment. After cooling, they are sintered in a high-temperature furnace at a sintering temperature of 650-950°C and a holding time of 2 hours to obtain Li 2 TiO 3 Ball entity.

[0033] In this embodiment measured by the Archimedes drainage method, whe...

Embodiment 3

[0037] 25g of Li 2TiO 3 Mix the powder and 10.7g of epoxy resin powder evenly, spread it on the workbench of the 3D printing equipment, then import the three-dimensional model of the ball (4mm in diameter, STL format) into the system, and set the working parameters of the equipment (laser power: 20W, laser beam diameter: 200μm, scanning distance: 200μm, scanning rate: 2000mm / s), start scanning layer by layer. The obtained pellets were transferred to a cold isostatic press, and the applied pressure was 300 MPa, and the pressure was maintained for 30 minutes to obtain relatively dense pellets. Then the pellets are moved into a resistance furnace for debinding treatment. After cooling, they are sintered in a high-temperature furnace at a sintering temperature of 850°C and a holding time of 2 hours to obtain Li 2 TiO 3 Ball entity.

[0038] The compactness of the pellet body prepared in this example was measured by the Archimedes drainage method to be 78.1%; the crush strength...

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Abstract

The invention provides a method for quickly manufacturing Li2TiO3 tritium breeding small balls. The method comprises the following steps that (1) Li2TiO3 powder and binder powder are mixed to form mixed powder; (2) a small ball three-dimensional model is established in a computer and is stored in the format of STL; (3) the mixed powder obtained in the step (1) is transferred into 3D printing equipment, the small ball three-dimensional model in the format of STL is introduced into a system of the 3D printing equipment; (4) technological parameters are set and the 3D printing equipment is started to obtain small ball entities; (5) the small ball entities are placed into a cold isostatic press to be compacted; (6) binder removal processing is conducted on the small ball entities; (7) the small ball entities are sintered in a sintering furnace. The Li2TiO3 small balls manufactured through the method are high in degree of sphericity, compactness and crushing strength, and large-scale and mechanical production of the Li2TiO3 tritium breeding small balls can be realized.

Description

technical field [0001] The invention relates to the field of 3D printing, in particular to a method for rapidly preparing Li 2 TiO 3 Method for Tritium Breeding Pellets. Background technique [0002] With the continuous development of society and economy, the demand for energy is increasing day by day. In order to finally solve the energy problem, people turned their attention to nuclear fusion. Fusion reactions cause less radiation during the reaction than fission reactions and are more energy dense than wind and solar energy. Therefore, nuclear fusion is undoubtedly the most ideal way of green and efficient production capacity. In November 2006, seven countries and units including China signed the ITER plan for the research and realization of nuclear fusion power generation. The raw materials for the fusion reaction are two isotopes of hydrogen, deuterium and tritium. Deuterium can be extracted from seawater, and the resources are relatively abundant. Tritium is the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/622B28B1/00
Inventor 严有为薛丽红李和平周启来
Owner HUAZHONG UNIV OF SCI & TECH
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