Preparation method of lithium metaaluminate porous microspheres as solid tritium multiplication agent

A technology of lithium metaaluminate and porous microspheres, which is applied in the direction of reducing greenhouse gases, nuclear reactors, and nuclear power generation. It can solve problems such as complex processes and achieve the effects of simple processes, good tritium release performance, and delayed hydrolysis and polycondensation rates.

Active Publication Date: 2017-04-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, only one template-assisted hydrothermal synthesis method (a hydrothermal method with template-assisted) has been reported for the preparation of lithium metaaluminate hollow microspheres, but this method needs to add a template as a pore-forming process during the preparation of hollow microspheres agent, and the template needs to be heat treated in the subsequent process, and the process is more complicated

Method used

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  • Preparation method of lithium metaaluminate porous microspheres as solid tritium multiplication agent
  • Preparation method of lithium metaaluminate porous microspheres as solid tritium multiplication agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1, a kind of preparation method of lithium metaaluminate porous microsphere, carries out following steps successively:

[0038] 1), 4g (0.011mol) sodium dodecylbenzenesulfonate and 8g OP-10 (hydrophilic, hydroxyl value 87±10) were dissolved in 300g deionized water, and stirred at 500r / min for 60min to obtain a mixed solution A ;

[0039]2) Dissolve 1.829g (0.018mol) of acetylacetone and 4.545g (0.018mol) of aluminum sec-butoxide in 16.950g of isopropanol, and stir at a speed of 500r / min for 60min to obtain a mixed solution B 1 ;

[0040] 3), the mixed solution B obtained in step 2) 1 Add 1.247g (0.018mol) lithium nitrate to , and keep stirring for 90min to obtain a clear mixed solution B 2 ;

[0041] 4), add 0.571g Span80 and 1.142g (0.003mol) polyethylene glycol to the mixed solution B 2 , and continued to stir for 60min, and finally obtained a clear and uniform mixed solution B 3 ;

[0042] 5), add the mixed solution A obtained in step 1) into a high...

Embodiment 2

[0045] Embodiment 2, change "4g sodium dodecylbenzenesulfonate and 8g OP-10" in embodiment 1 into "12g sodium dodecylbenzenesulfonate", and the rest are the same as embodiment 1.

[0046] The size of the obtained lithium metaaluminate porous microsphere is 1-3 μm, the inside of the microsphere is a closed pore structure, and the diameter of the closed pore is 400nm-700nm. The specific surface area is 98m 2 / g, the purity is 88%.

Embodiment 3

[0047] Example 3. Change "1.829g acetylacetone" in Example 1 to "2.377g ethyl acetoacetate", and change the heat treatment temperature from 1000°C to 1300°C; the rest are the same as in Example 1.

[0048] The size of the obtained lithium metaaluminate porous microsphere is 2-4 μm, and the inside of the microsphere is a closed pore structure, and the diameter of the closed pore is 500nm-800nm. The specific surface area is 105m 2 / g, the purity is 91%.

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Abstract

The invention discloses a method for preparing a lithium metaaluminate porous microsphere serving as solid tritium breeder. The method comprises the following steps as follows: (1), a water-soluble surface active agent is dissolved in deionized water to obtain a mixed solution A; (2), a solvent, a chelating agent and an aluminum salt precursor are mixed to obtain a mixed solution B1; (3), a lithium source is added into the mixed solution B1 and is constantly stirred to obtain a mixed solution B2; (4), Span80 and a phase separation inductive agent are added into the mixed solution B2 and then is constantly stirred to obtain a mixed solution B3; (5), the mixed solution A is added into a high-speed dispersion machine to be stirred, and then the mixed solution B3 is added and constantly stirred to obtain emulsion; (6), the emulsion obtained in the step (5) is centrifuged, and solids obtained after centrifugation are dried after being washed and are subjected to thermal treatment at the temperature of 1000-1300 DEG C for 2-4 h to obtain the lithium metaaluminate porous microsphere. The lithium metaaluminate porous microsphere has an internal sealed macroporous structure.

Description

technical field [0001] The invention relates to a preparation method of a lithium metaaluminate porous microsphere which can be used as a solid tritium multiplication agent; in particular, it relates to a preparation method of a lithium metaaluminate porous microsphere with an inner closed macropore structure. Background technique [0002] In the thermonuclear fusion reaction, in order to maintain the fuel cycle, tritium must be continuously supplemented. The current effective method is to breed tritium through the reaction of neutrons and lithium. Solid breeders are a class of tritium-producing materials developed to solve the safety problems of traditional breeders such as molten metal lithium, lithium molten salts, and lithium alloys. Compared with traditional breeders, they are also chemically and thermally stable Good, high compatibility with structural materials, convenient extraction of tritium, low cost and other advantages, so it has attracted extensive attention. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21B1/15
CPCG21B1/15Y02E30/10
Inventor 郭兴忠谢园郝贵松杨辉
Owner ZHEJIANG UNIV
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