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A high sphericity tritium multiplication agent nanostructure lithium titanate ceramic pellets and preparation method thereof

A technology of structural lithium titanate and tritium multiplier, which is applied to ceramic products, other household utensils, household utensils, etc., can solve the problems of unsatisfactory sphericity of small balls, affect engineering use, and high surface energy, so as to reduce radiation exposure Crack condition, uniform structure, effect of improving sphericity

Active Publication Date: 2020-11-03
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface energy of the nano-lithium titanate ceramic precursor powder (particle size about 30-40nm) obtained by the solvothermal method, it is easy to agglomerate, which leads to the preparation of the nano-lithium titanate ceramic precursor powder slurry prepared by the water system. Poor fluidity in the wet molding process makes the sphericity of the prepared pellets unsatisfactory, which in turn affects the use of later projects (reasons and solutions for the agglomeration of nanopowders, Yang Chunguang et al. Shanxi Chemical Industry 2003.23(1): P.56- 58.)

Method used

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  • A high sphericity tritium multiplication agent nanostructure lithium titanate ceramic pellets and preparation method thereof
  • A high sphericity tritium multiplication agent nanostructure lithium titanate ceramic pellets and preparation method thereof
  • A high sphericity tritium multiplication agent nanostructure lithium titanate ceramic pellets and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of precursor powder

[0043] Add 10.172g of lithium hydroxide monohydrate into a mixed solvent composed of 40ml of ethanol and 80ml of deionized water, and heat and stir in an oil bath at 50°C for 50min until the lithium hydroxide is completely dissolved to obtain a lithium ion concentration of 2.0mol / L solution; then 9.604g particle size 5~10nm anatase nano-titanium dioxide and 2.652g CTAB are added successively to the solution that is dissolved with lithium hydroxide to obtain a mixed solution, and the gained mixed solution is transferred to a 150ml reaction kettle, and the temperature is raised to React at 200°C for 20 hours; after the reaction, separate the product and dry the product at 70°C for 24 hours, then grind the dried product and pass through a 250-mesh sieve to obtain the precursor powder.

[0044] (2) Preparation of lithium titanate ceramic pellets

[0045] ① Prepare the premix, put 1.5mL fish oil and 8.5mL deionized water in a beaker, th...

Embodiment 2

[0059] (1) Preparation of precursor powder

[0060] Add 10.172g of lithium hydroxide monohydrate into a mixed solvent composed of 40ml of ethanol and 80ml of deionized water, and heat and stir in an oil bath at 50°C for 50min until the lithium hydroxide is completely dissolved to obtain a lithium ion concentration of 2.0mol / L solution; then 9.604g particle size 5~10nm anatase nano-titanium dioxide and 2.652g CTAB are added successively to the solution that is dissolved with lithium hydroxide to obtain a mixed solution, and the gained mixed solution is transferred to a 150ml reaction kettle, and the temperature is raised to React at 200°C for 20 hours; after the reaction, separate the product and dry the product at 70°C for 24 hours, then grind the dried product and pass through a 250-mesh sieve to obtain the precursor powder.

[0061](2) Preparation of lithium titanate ceramic pellets

[0062] ① Prepare the premix, put 2.5mL fish oil and 7.5mL deionized water in a beaker, the...

Embodiment 3

[0068] (1) Preparation of precursor powder

[0069] Add 10.172g of lithium hydroxide monohydrate into a mixed solvent composed of 40ml of ethanol and 80ml of deionized water, and heat and stir in an oil bath at 50°C for 50min until the lithium hydroxide is completely dissolved to obtain a lithium ion concentration of 2.0mol / L solution; then 9.604g particle size 5~10nm anatase nano-titanium dioxide and 2.652g CTAB are added successively to the solution that is dissolved with lithium hydroxide to obtain a mixed solution, and the gained mixed solution is transferred to a 150ml reaction kettle, and the temperature is raised to React at 200°C for 20 hours; after the reaction, separate the product and dry the product at 70°C for 24 hours, then grind the dried product and pass through a 250-mesh sieve to obtain the precursor powder.

[0070] (2) Preparation of lithium titanate ceramic pellets

[0071] ①To prepare the premix, put 1.0mL polyacrylic acid and 9.0mL deionized water in a ...

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Abstract

The invention discloses a tritium proliferation agent lithium titanate ceramic pellet with high degree of sphericity and a nano structure and a preparation method of the pellet. Slurry with good fluidity is prepared from pre-mixed liquid which comprises a polymer dispersing agent (fish oil, polyacrylic acid or polyethylene glycol 400) and deionized water and precursor powder, and the lithium titanate ceramic pellet with high degree of sphericity and the nano structure can be further prepared from the obtained slurry through wet forming and high-temperature sintering. Not only can filling of atritium proliferation pellet bed and recovery of residual lithium be facilitated, but also the bulk density of the pellets can be increased so that a tritium proliferation agent with high-density lithium is obtained; furthermore, the thermal stress and radiation rupture of the tritium proliferation agent can be further reduced, and the service life of the tritium proliferation agent can be improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear energy materials, and relates to the preparation of a tritium breeder, in particular to a technology for preparing tritium breeder nanostructure lithium titanate ceramic balls with high sphericity. Background technique [0002] Nuclear fusion energy has attracted more and more attention from human beings due to its advantages of environmental protection, cleanliness, safety and sustainability. Among them, deuterium-tritium fusion is considered to be one of the most easily realized reactions for human beings. Deuterium is abundant in seawater and is very easy to obtain. However, tritium, as a non-naturally occurring isotope of hydrogen, must be obtained through a violent reaction between neutrons and lithium atoms under high temperature and high pressure environments. At present, the ideal lithium sources include solid lithium ceramics and liquid lithium alloys. Compared with liquid lithium alloys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/462C04B35/622C04B35/626C04B35/64C04B38/00
CPCC04B35/462C04B35/622C04B35/6264C04B35/62695C04B35/64C04B38/0041C04B38/009C04B2235/6562C04B2235/6565
Inventor 卢铁城王海亮杨茂施奇武齐建起廖志君
Owner SICHUAN UNIV
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