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Method for preparing powder based on oxide(s) of yttrium, aluminium and optionally at least one other element

A technology of oxides and elements, applied in chemical instruments and methods, aluminum compounds, rare earth metal compounds, etc., can solve problems such as complex shapes

Active Publication Date: 2020-06-05
COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This highly porous morphology is very complex and difficult to form by routes traditionally used for optical materials

Method used

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  • Method for preparing powder based on oxide(s) of yttrium, aluminium and optionally at least one other element
  • Method for preparing powder based on oxide(s) of yttrium, aluminium and optionally at least one other element
  • Method for preparing powder based on oxide(s) of yttrium, aluminium and optionally at least one other element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] In this example, the preparation has the formula Y 3 Al 4.985 Mg 0.01 Cr 0.005 O 12 Powder.

[0091] For this reason, in the first step, add 30mL to 70mL ultrapure aqueous solution P123, 8.4916g citric acid monohydrate, 5.2581g yttrium nitrate tetrahydrate (Y(NO 3 ) 3 .4H 2 O), 9.4457g aluminum nitrate nonahydrate (Al(NO 3 ) 3 .9H 2 O), 7.5mg magnesium nitrate (Mg(NO 3 ) 3 ) And 10.1mg chromium nitrate nonahydrate (Cr(NO 3 ) 3 .9H 2 O). Continue to stir the mixture until the solution becomes clear and the solids are completely dissolved. In the second step, under stirring, 3.001 g of N,N'-methylene-bis(acrylamide) was added to 30 mL of acrylic acid solution, and stirring was continued until the resulting solution became clear. The two solutions were then heated to 60°C. The acrylic acid-containing solution is added to the cation-containing aqueous solution. Once the solution was added, the temperature was immediately increased to 100°C. When this value is reached, the ...

Embodiment 2

[0094] In this example, the preparation has the formula Y 2.994 Ca 0.006 Al 4.995 Cr 0.005 O 12 Powder.

[0095] For this reason, in the first step, add 30mL to 70mL ultrapure aqueous solution L35, 8.4914g citric acid monohydrate, 5.2474g yttrium nitrate tetrahydrate (Y(NO 3 ) 3 .4H 2 O), 9.4629g aluminum nitrate nonahydrate (Al(NO 3 ) 3 .9H 2 O), 7.1mg calcium nitrate tetrahydrate (Ca(NO 3 ) 3 .4H 2 O) and 10.2mg chromium nitrate nonahydrate (Cr(NO 3 ) 3 .9H 2 O). Continue to stir the mixture until the solution becomes clear and the solids are completely dissolved. In the second step, under stirring, 3.0001 g of N,N'-methylene-bis(acrylamide) was added to 30 mL of acrylic acid solution, and stirring was continued until the resulting solution became clear. The two solutions were then heated to 60°C. The acrylic acid-containing solution is added to the cation-containing aqueous solution. Once the solution was added, the temperature was immediately increased to 100°C. When this...

Embodiment 3

[0098] In this example, the preparation has the formula Y 2.994 Ca 0.006 Al 4.995 Cr 0.005 O 12 Powder.

[0099] For this reason, in the first step, add 30mL to 70mL ultrapure aqueous solution P123, 8.4914g citric acid monohydrate, 5.2474g yttrium nitrate tetrahydrate (Y(NO 3 ) 3 .4H 2 O), 9.4629g aluminum nitrate nonahydrate (Al(NO 3 ) 3 .9H 2 O), 7.1mg calcium nitrate tetrahydrate (Ca(NO 3 ) 3 .4H 2 O) and 10.2mg chromium nitrate nonahydrate (Cr(NO 3 ) 3 .9H 2 O). Continue to stir the mixture until the solution becomes clear and the solids are completely dissolved. In the second step, 21 g of acrylamide was added to 30 mL of the aqueous solution raised to 50°C, and then 2.1 g of N,N'-methylene-bis(acrylamide) was added. Continue to stir the mixture until the solution becomes clear.

[0100] The solution containing acrylamide is added to the aqueous solution containing cations. Once the solution was added, the temperature was immediately increased to 100°C. When this value is ...

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Abstract

The invention relates to a method for preparing a powder based on the oxide(s) of yttrium, aluminium and optionally at least one other element. The method comprises a) a step of adding at least one monomer and at least one polymer from the polyether family to a solution comprising yttrium, aluminium and optionally at least one other element, wherein the yttrium, the aluminium and optionally at least the other element are in cationic form, and the monomer(s) comprises at least one ethylenic group and at least one polar group capable of forming hydrogen bonds; b) a step of obtaining a gel trapping the solution by polymerization of the monomer(s) added in a); c) a step of obtaining a xerogel by dehydration of the gel obtained in b); d) a step of obtaining the powder by heat treatment of the xerogel obtained in c).

Description

Technical field [0001] The present invention relates to a method for preparing powders based on oxides of yttrium, oxides of aluminum and optionally oxides of at least one other element. [0002] This method can be used especially for the production of transparent ceramics which can be used especially as optical elements. Background technique [0003] Generally, transparent ceramics, and more particularly polycrystalline ceramics, are more popular than single crystal ceramics, especially when used as amplifier media in laser cavities. In fact, this type of ceramic has many advantages, one of which is the ability to combine different chemical compositions to give them complex shapes. [0004] When these ceramics have a simple chemical composition, they have the formula Y 3 Al 5 O 12 In the case of the chemical composition of garnet-type oxides (also known as YAG by acronyms), they usually form yttrium oxide (Y 2 O 3 ) And alumina (Al 2 O 3 ) It is obtained by reactively sintering a m...

Claims

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Application Information

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IPC IPC(8): C04B35/111C01F7/00C01F17/32C04B35/115C04B35/505
CPCC04B35/111C04B35/115C04B35/505C04B35/6261C04B35/62625C04B35/62695C01P2004/03C01P2004/50C04B2235/3206C04B2235/3208C04B2235/3217C04B2235/3224C04B2235/3225C04B2235/3229C04B2235/3241C04B2235/602C04B2235/6021C04B2235/6022C04B2235/9653C01F17/34
Inventor 蒂博·德拉艾马丁·勒布朗萨拉·米拉
Owner COMMISSARIAT A LENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES