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Method for preparing (Y1-xYbx)AG transparent ceramic from monodisperse spherical Y2O3 and Al2O3 powder

A transparent ceramic, monodisperse technology, applied in the field of materials, can solve the problems that restrict the development of YAG transparent ceramics, high activation energy between molecules, and difficult to mix uniformly, and achieve the effects of being conducive to sintering, easy to promote, and less environmental pollution

Active Publication Date: 2018-01-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw material used in the solid phase method is commercial Y 2 o 3 The powder has agglomeration, large particles, and uneven size distribution. It is difficult to mix uniformly. The diffusion between molecules requires high activation energy. The pure phase of YAG can only be obtained by sintering at high temperature for a long time. These all restrict the preparation of YAG by solid phase method. Development of Transparent Ceramics

Method used

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  • Method for preparing (Y1-xYbx)AG transparent ceramic from monodisperse spherical Y2O3 and Al2O3 powder

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1, preparing monodisperse spherical Y 2 o 3 powder

[0022] Monodisperse spherical Y 2 o 3 The preparation of the powder adopts the homogeneous precipitation method. First set Y 2 o 3 powder dissolved in an appropriate amount of hot concentrated HNO 3 get Y(NO 3 ) 3 solution, prepared as a 500mL mixed solution, in which Y(NO 3 ) 3 Concentration 0.15M and CO(NH 2 ) 2 The concentration was 0.5M, and stirred evenly, the mixed solution was heated to 90°C and kept for 2h. After the end, the precipitate was cooled, centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 80°C for 24 hours to obtain a white and soft Y2 o 3 Precursor powder. The precursor was ground, sieved, and then calcined in a muffle furnace at 900°C to obtain Y 2 o 3 Powder.

[0023] Step 2, preparing monodisperse spherical Al 2 o 3 powder

[0024] First prepare Al(NO 3 ) 3 solution, prepared as a 500mL mixed solution, in which Al(NO 3 ) 3 The conc...

Embodiment 2

[0028] Step 1, preparing monodisperse spherical Y 2 o 3 Powder

[0029] Monodisperse spherical Y 2 o 3 The preparation of the powder adopts the homogeneous precipitation method; first, prepare a mixed solution of 0.5L, wherein Y(NO 3 ) 3 The concentration is 0.1M and CO(NH 2 ) 2 The concentration is 0.2M, and stir evenly, heat the mixed solution to 80°C, and keep it warm for 2h; after the end, the precipitate is cooled, centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 80°C for 24h to obtain white Fluffy Y 2 o 3 Precursor powder; the precursor is ground, sieved, and then calcined in a muffle furnace at 900°C to obtain Y 2 o 3 Powder.

[0030] Step 2, preparing monodisperse spherical Al 2 o 3 powder

[0031] Al(NO 3 ) 3 solution, prepare a mixed solution of 0.5L, in which Al(NO 3 ) 3 The concentration is 0.002M, (NH 4 ) 2 SO 4 The concentration is 0.002M and CO(NH 2 ) 2 The concentration is 0.05M, and stir evenly, heat...

Embodiment 3

[0035] Step 1, preparing monodisperse spherical Y 2 o 3 powder

[0036] Monodisperse spherical Y 2 o 3 The preparation of the powder adopts the homogeneous precipitation method; firstly, the mixed solution is prepared, wherein Y(NO 3 ) 3 The concentration is 0.2M and CO(NH 2 ) 2 The concentration is 0.7M, and stir evenly, heat the mixed solution to 80-100°C, and keep it warm for 2h; after the end, the precipitate is cooled, centrifuged, washed with deionized water and absolute ethanol, and dried in an oven at 80°C for 24h get white fluffy y 2 o 3 Precursor powder; the precursor is ground, sieved, and then calcined in a muffle furnace at 900°C to obtain Y 2 o 3 Powder.

[0037] Step 2, preparing monodisperse spherical Al 2 o 3 Powder

[0038] Al(NO 3 ) 3 solution, prepared as a mixed solution, in which Al(NO 3 ) 3 Concentration of 0.01M, (NH 4 ) 2 SO 4 The concentration is 0.008M and CO(NH 2 ) 2 The concentration is 0.15M, and stir evenly, heat the mixed ...

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Abstract

The invention belongs to the technical field of materials and provides a method for preparing (Y1-xYbx)AG transparent ceramic from monodisperse spherical Y2O3 and Al2O3 powder. According to the methodprovided by the invention, monodisperse spherical Al2O3 powder is prepared by adopting a homogeneous co-precipitation method; the monodisperse spherical Al2O3 powder, prepared monodisperse sphericalY2O3 powder and nano Yb2O3 powder are mixed to obtain a raw material; a solid-phase reaction method, a pressing and molding technology and a vacuum sintering technology are used for treating the raw material to prepare Yb:YAG transparent ceramic. The prepared Y2O3 powder and the prepared spherical Al2O3 powder have uniform grains and good dispersity; a preparation technology is simple; when the powder is molded, a blank has high density and is easily sintered to prepare laser transparent ceramic; the method provided by the invention has the advantages of simple reaction conditions, small environment pollution, easiness for popularization and the like.

Description

technical field [0001] The invention belongs to the technical field of materials and relates to a monodisperse spherical Y 2 o 3 and Al 2 o 3 Powder preparation (Y 1-x Yb x ) AG transparent ceramic method. Background technique [0002] YAG (Yttrium Aluminum Garnet) is the abbreviation of yttrium aluminum garnet, chemical formula Y 3 A1 5 o 12 , belongs to the cubic crystal system, the chemical properties are very stable, and it has good optical and mechanical properties. Doped with Nd 3+ , Yb 3+ Rare earth ions can be used to prepare laser crystals, which are widely used in laser, medicine and national defense. YAG crystal is an important laser matrix material, among which Nd:YAG and Yb:YAG are the most widely used laser materials. Since the preparation of YAG single crystals is mostly grown by the pulling method, there are many limitations, such as: long growth period, high cost, difficulty in achieving large-scale growth and high-concentration doping, etc., so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/505C04B35/626
Inventor 李金生孙旭东张玉文刘志发杜耀豪齐西伟
Owner NORTHEASTERN UNIV
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