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Yttrium aluminum garnet powder without sintering aid, yttrium aluminum garnet ceramic, and preparation method and application thereof

A powder and ceramic technology, applied in the field of laser transparent ceramic preparation, can solve the problems of long production cycle, high cost, difficulty in realizing high-concentration doping of rare earth and large-scale preparation, etc., and achieves clean grain boundaries and uniform grain size. Effect

Active Publication Date: 2020-11-13
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, YAG single crystal is commonly grown by pulling method, but the process cost is high, the production cycle is long, and it is difficult to achieve high-concentration rare earth doping and large-scale preparation
Although the cost of neodymium glass is low and the process is simple, its thermal conductivity is 1 / 14 of that of YAG single crystal, and its hardness and softening point are low, so it is difficult to achieve continuous high-power laser output

Method used

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  • Yttrium aluminum garnet powder without sintering aid, yttrium aluminum garnet ceramic, and preparation method and application thereof
  • Yttrium aluminum garnet powder without sintering aid, yttrium aluminum garnet ceramic, and preparation method and application thereof
  • Yttrium aluminum garnet powder without sintering aid, yttrium aluminum garnet ceramic, and preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) According to (Nd 0.01 Y 0.99 ) 3 Al 5 o 12 The stoichiometric ratio of Nd 2 o 3 、Al 2 o 3 , Y 2 o 3 As a raw material, based on the total amount of all raw materials, add 0.5wt% binder polyvinyl butyral, 0.6wt% dispersant oleic acid, absolute ethanol ball mill, and alumina balls into an agate jar Ball milling for 18 hours;

[0060] (2) drying the slurry obtained in step (1) in an oven at 70°C;

[0061] (3) the YAG coarse powder that step (2) obtains is carried out fluidized bed spheroidization, granulation, binder solution is 10% polyvinyl alcohol solution, and inlet air temperature is 74 ℃, and injection speed 10ml / min, The spray pressure is 0.2MPa, and the granulation is circulated for 3 times to obtain a spherical YAG powder with an average particle size of about 50 μm;

[0062] (4) Calcining the spherical YAG powder obtained in step (3) at 1350° C. for 2 hours in air to synthesize a pure YAG phase, and then cold isostatic pressing to obtain a ceramic...

Embodiment 2

[0070] (1) According to (Yb 0.02 Y 0.98 ) 3 Al 5 o 12 The stoichiometric ratio of Yb 2 o 3 、Al 2 o 3 , Y 2 o 3 For raw material, other steps are identical with example 1;

[0071] (2) Flash sinter the ceramic green body obtained in step (1), and sinter it at 1600° C. for 15 minutes under a pressure of 100 MPa to obtain a 2at% Yb:YAG transparent ceramic with an average grain size of about 3 μm.

[0072] Such as Figure 6 The average grain size of the 2at%Yb:YAG transparent ceramic shown is about 3 μm, YAG is completely dense, and there is no precipitation of amorphous phases and impurities at the grain boundary, the grain boundary is clean, and the grain size is uniform.

Embodiment 3

[0074] (1) According to Y 3 Al 5 o 12The stoichiometric ratio, adding 0.3wt% binder polyvinyl butyral, 1wt% dispersant oleic acid, absolute ethanol ball mill, and alumina balls were put into an agate jar for ball milling for 18 hours;

[0075] (2) drying the slurry obtained in step (1) in an oven at 70°C;

[0076] (3) The powder obtained in step (2) is subjected to fluidized bed spheroidization and granulation, the binder solution is 15% polyvinyl alcohol solution, the inlet air temperature is 76°C, and the injection speed is 15ml / min, spray The pressure is 0.4MPa, and the granulation is circulated for 3 times to obtain a spherical powder with a particle size of about 100 μm;

[0077] (4) Calcining the spherical powder obtained in step (3) at 1350° C. in air for 2 hours to synthesize a pure YAG phase, and then cold isostatic pressing to obtain a ceramic green body.

[0078] (5) The green body obtained in step (4) was sintered by spark plasma under a pressure of 30 MPa and ...

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Abstract

The invention discloses yttrium aluminum garnet (YAG) powder without a sintering aid, yttrium aluminum garnet ceramic as well as a preparation method and application thereof. The YAG powder is prepared from (RExY1-x)3Al5O12, a binder and a dispersing agent according to a mass ratio of 100: (0.1-1.0): (0.1-1.0); wherein x is equal to 0-1, and RE represents rare earth elements. YAG powder is calcined and subjected to cold isostatic pressing to obtain a ceramic biscuit, the biscuit is placed in a mold and subjected to spark plasma sintering or scintillation sintering, the ceramic is polished, andthe yttrium aluminum garnet transparent ceramic can be obtained. A sintering aid is not required to be added into the ceramic, YAG is completely compact, a grain boundary is free of heterogeneous precipitation, the grain boundary is clean, a grain boundary layer is very thin, the scattering loss of the ceramic can be remarkably reduced, and the linear transmittance of a near-infrared band reachesa theoretical value through a pressure and high-voltage multi-field coupling sintering mode.

Description

technical field [0001] The invention relates to yttrium aluminum garnet (YAG) powder without sintering aid, yttrium aluminum garnet (YAG) ceramics, a preparation method and application thereof, and belongs to the technical field of laser transparent ceramic preparation. Background technique [0002] As one of the "four great inventions" of contemporary science and technology, laser technology has broad application prospects in important fields such as scientific research, military affairs, industrial production, and biomedicine. Among them, solid-state lasers play a leading role in the field of laser applications due to their advantages such as high peak power, small size, and simple structure. [0003] Laser materials are the core of solid-state lasers and an important unit for the development of high-energy, high-power all-solid-state lasers. Laser materials on the market are mainly rare earth doped YAG (yttrium aluminum garnet) single crystal and neodymium glass. At pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/505C04B35/50C04B35/626H01S3/16
CPCC04B35/44C04B35/505C04B35/50C04B35/626H01S3/1643C04B2235/9653C04B2235/786
Inventor 黄秋凤郭旺陈剑邓种华刘著光黄集权
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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