Polymerization forming preparation process of ternary lithium ceramic microsphere

A technology of ceramic microspheres and microspheres, applied in ceramic products, applications, household appliances, etc., can solve the problems of poor sphericity of ceramic microspheres, insufficient internal pore structure, poor particle size dispersion, etc.

Inactive Publication Date: 2009-10-21
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0007] Most of the existing ceramic microsphere preparation methods need to pre-prepare the ceramic powder of the ternary lithium compound, and then generate ceramic microspheres. The sphericity of the ceramic microspheres is not good, the internal pore structure is not rich enough, and the particle size of the microspheres is difficult to control. Poor particle size dispersion

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  • Polymerization forming preparation process of ternary lithium ceramic microsphere

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[0030]The preparation method of ternary lithium ceramic microspheres by polymerization and molding in the present invention comprises the following steps: (1) dissolving the raw materials for preparing ternary lithium ceramic microspheres, polymer monomers, crosslinking agents and auxiliary agents, etc. in a solvent to form A pasty mixture. The monomer is acrylamide, the crosslinking agent is methylenebisacrylamide, and the auxiliary agent is polyacrylamide. (2) Add defoamer to the pasty mixture and transfer it to a planetary grinder for 2 to 6 hours of grinding. After grinding, the mixture becomes a basically stable suspension slurry, in which the defoamer is isooctyl alcohol or fatty acid. (3) Add initiator and catalyst to the suspension slurry, stir quickly, transfer to the microsphere forming device, and form a bead-like liquid with a diameter of 1.0mm to 3.0mm through the nozzle under a certain pressure. , moving from top to bottom in a hydrophobic medium with a high vi...

Embodiment 1

[0033] (1) Dissolve 5g of acrylamide, 2g of polyacrylamide, and 0.5g of methylenebisacrylamide in 100g of water; (2) weigh Li 2 CO 3 and SiO 2 Powder 150g, add (1) the prepared solution and mix; (3) add 5 drops of isooctyl alcohol, and grind in a planetary mill for 5 hours to form a suspension slurry; (6) in the ground slurry Add 10 drops of 5% ammonium persulfate solution and 8 drops of tetramethylethylenediamine, stir evenly; (7) put the slurry into figure 1 In the microsphere preparation device shown, the pressure control system is turned on, and the pressure is controlled at 20kPa. The slurry is sprayed from the nozzle and dripped into the heated silicone oil. Due to the surface tension, the microspheres are formed, and the microspheres fall under the action of gravity. Cross-linking reaction takes place in the process and solidify; (8) the basically solidified microsphere drops to the microsphere collector and further reacts completely, the microsphere precursor that fo...

Embodiment 2

[0035] (1) Dissolve 6g of acrylamide, 2g of polyacrylamide, and 0.5g of methylenebisacrylamide in 100g of water; (2) weigh Li 2 CO 3 and TiO 2 Powder 150g, add (1) prepared solution and mix; (3) add 8 drops of isooctyl alcohol, grind in planetary grinder for 6 hours to form ceramic slurry; (6) add 5 % ammonium persulfate solution 10 drops and 8 drops of tetramethylethylenediamine, stir evenly; (7) put the slurry into figure 1 In the microsphere preparation device shown, the pressure control system is turned on, and the pressure is controlled at 10kPa. The slurry is sprayed from the nozzle and dripped into the heated silicone oil. Microspheres are formed due to the effect of surface tension. Under the action of gravity, the microspheres fall. (8) the basically solidified microspheres drop into the microsphere collector for further reaction to form a microsphere precursor; (9) use CCl 4 Cleaning the fully reacted microsphere precursor; (10) aging the microsphere precursor at ...

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Abstract

The invention provides a polymerization molding preparation method of ternary lithium ceramic microspheres. Its characteristics include: polymerizing and crosslinking network macromolecules to support the skeleton with polymer monomers, crosslinking agents, initiators and catalysts, etc., and play a certain bonding role to tightly bond the solid phase reactants together to form Precursor of ceramic microspheres; calcining the formed microspheres at a certain temperature for a certain period of time to cause a solid-state reaction to completely generate a ternary lithium compound to form a ceramic microsphere body; calcining and sintering the microsphere body at a high temperature Ceramicization to obtain ternary lithium ceramic microspheres. The solid raw material in the preparation method of the present invention is a solid reactant raw material for preparing ternary lithium ceramic microspheres, but ternary lithium ceramic powder can also be used. The preparation method of the present invention has simple molding process, low cost, good sphericity of ceramic microspheres, good internal pore structure, controllable particle size of microspheres, good particle size dispersibility, high apparent density, high phase purity, etc. .

Description

technical field [0001] The invention belongs to the technical field of preparation of porous ceramics, and in particular relates to a preparation method for polymerization and molding of ternary lithium ceramic microspheres. Background technique [0002] The tritium breeder utilizes neutrons (1) generated by the D-T reaction in the core to react with lithium-containing materials in the breeder cladding to produce tritium to realize tritium breeder. Generally speaking, natural lithium ceramics contain two isotopes of lithium 6 Li and 7 Li, the fuel tritium multiplication required in the hybrid reactor is generally through (2) 6 Li(n,α)T reaction to achieve. [0003] D+T→n+ 4 He+17.6MeV (1) [0004] n+ 6 Li→T+ 4 He+4.78MeV (2) [0005] n+ 7 Li→T+ 4 He+n′-2.82MeV (3) [0006] In order to realize the fuel cycle, tritium must be "self-sustained" in the fusion reactor or the hybrid reactor. For this reason, it is necessary to add a lithium-containing tritium breeder to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/00C04B35/634C04B35/64C04B35/622C04B35/10C04B35/14C04B35/16C04B35/462C04B35/48C04B35/01
Inventor 陈晓军王和义高小铃黄玮罗阳明肖成建古梅
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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