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Liquid-phase preparation method for nano lithium fluoride

A lithium fluoride and nanotechnology, which is applied in the field of liquid phase preparation of nanometer lithium fluoride, can solve the problems that solid-state mixing is difficult to achieve sufficient uniformity, and the processes are numerous and complicated, and can inhibit the growth of particle size, the process is simple, and the loss of raw materials can be reduced. Effect

Inactive Publication Date: 2017-10-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage of this patent is that the process is complicated and the raw materials are mixed in a solid state, and it is difficult to achieve sufficient uniformity in solid state mixing.

Method used

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  • Liquid-phase preparation method for nano lithium fluoride
  • Liquid-phase preparation method for nano lithium fluoride
  • Liquid-phase preparation method for nano lithium fluoride

Examples

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Effect test

Embodiment 1

[0029] A method for preparing nano-lithium fluoride in liquid phase, the steps are as follows:

[0030] (1) Calculate according to the preparation of 2gLiF, weigh out LiOH·H according to the stoichiometric ratio of 1:1.1 2 O3.2354g, NH 4 F3.1414g;

[0031] (2) Put the weighed LiOH·H 2 O and NH 4 F is soluble in absolute ethanol with a volume ratio of 1:50;

[0032] (3) Place the solution described in step (2) on a magnetic stirrer and stir, and react. The reaction time is 3 hours; the reacted solution is centrifuged, and the precipitate is taken out and dried at 60°C for 10 hours to prepare precursors The precursor is placed in a corundum ark in a closed and aerated atmosphere furnace, the atmosphere furnace is evacuated to a vacuum state, and then the preparation reaction is carried out at 150°C under the protection of high-purity argon, the reaction time is 10 hours; the reaction is over Afterwards, the furnace temperature was raised to 300°C, and the high-purity argon gas was use...

Embodiment 2

[0035] A method for preparing nano-lithium fluoride in liquid phase, the steps are as follows:

[0036] (1) Calculate according to the preparation of 2gLiF, weigh out LiOH·H according to the stoichiometric ratio of 1:1.1 2 O3.2354g, NH 4 F3.1414g;

[0037] (2) Put the weighed LiOH·H 2 Place O in a polytetrafluoroethylene beaker, add absolute ethanol to prepare a solution with a volume ratio of 1:50, and place it on a magnetic stirrer for 3 hours;

[0038] (3) In step (2), the weighed NH 4 F is gradually added to LiOH·H 2 O in anhydrous ethanol solution (add 0.449g every 20 minutes, the total mass is 3.1414g, until the addition is complete); after the reaction, the solution is centrifuged, the precipitate is taken out and dried at 60°C for 10h to prepare the precursor; the precursor is used The corundum ark is placed in a closed and ventilated atmosphere furnace, the atmosphere furnace is evacuated to a vacuum state, and then the preparation reaction is carried out at 150°C under the ...

Embodiment 3

[0041] A method for preparing nano-lithium fluoride in liquid phase, the steps are as follows:

[0042] (1) Calculate according to the preparation of 2gLiF, weigh out LiOH·H according to the stoichiometric ratio of 1:1.1 2 O3.2354g, NH 4 F3.1414g;

[0043] (2) Put the weighed LiOH·H 2 O and NH 4 F is soluble in absolute ethanol with a volume ratio of 1:100;

[0044] (3) Place the solution described in step (2) on a magnetic stirrer and stir, and react. The reaction time is 3 hours; the reacted solution is centrifuged, and the precipitate is taken out and dried at 60°C for 10 hours to prepare precursors The precursor is placed in a corundum ark in a closed and aerated atmosphere furnace, the atmosphere furnace is evacuated to a vacuum state, and then the preparation reaction is carried out at 150°C under the protection of high-purity argon, the reaction time is 10 hours; the reaction is over Afterwards, the furnace temperature was raised to 300°C, and the high-purity argon gas was us...

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Abstract

The invention relates to a method for preparing nano-lithium fluoride in a liquid phase. The invention uses lithium hydroxide and ammonium fluoride as raw materials, dissolves the two in an organic solvent at normal temperature, and reacts in the liquid phase of the organic solvent to form nano-fluoride Lithium fluoride; after the reaction of the raw materials is complete, the solution is centrifuged, and the precipitate is dried as a precursor; the precursor is heated and reacted and impurities are removed to obtain a high-purity nano-lithium fluoride product. The method of the present invention has simple production process, low production cost, low requirements on equipment, and safe operation, and can prepare nano-scale lithium fluoride at a relatively low temperature; the prepared product lithium fluoride is nano-scale and has a particle size distribution Uniform, the sample particles are full and the shape is good.

Description

Technical field [0001] The invention relates to the field of preparation methods of nanometer lithium fluoride, in particular to a method for preparing nanometer lithium fluoride in liquid phase. Background technique [0002] Lithium fluoride (LiF), a white powdery substance, is an important lithium-based basic material and has a wide range of functions in many fields. Used as a carrier in breeder reactors to manufacture lithium fluoride crystals and optical fibers. Because lithium fluoride crystals have a higher transmittance in the vacuum ultraviolet band and a lower refractive index in the infrared band, lithium fluoride is used Used as a window material for optical instruments; the metering agent prepared by using the color center effect of lithium fluoride crystals plays a huge role in detecting the surrounding environment of nuclear power plants in my country. High-purity lithium fluoride is an electrolyte used in the manufacture of lithium ion secondary batteries, lithium ...

Claims

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Application Information

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IPC IPC(8): C01D15/04B82Y40/00
CPCC01D15/04B82Y40/00C01P2002/72C01P2004/03C01P2004/62C01P2004/64C01P2006/80
Inventor 王烈林谢华曾阳
Owner SOUTHWEAT UNIV OF SCI & TECH
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