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Method for preparing yttrium aluminium garnet transparent ceramic with composite structure

A technology of yttrium aluminum garnet and composite structure is applied in the field of preparation of Re:YAG composite structure polycrystalline transparent ceramics

Inactive Publication Date: 2014-03-12
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many articles and patent reports on the preparation of YAG transparent ceramics in China, but there have been no reports on the preparation of composite structure transparent ceramics by vacuum pressure grouting

Method used

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  • Method for preparing yttrium aluminium garnet transparent ceramic with composite structure
  • Method for preparing yttrium aluminium garnet transparent ceramic with composite structure
  • Method for preparing yttrium aluminium garnet transparent ceramic with composite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh 100g of high-purity Nd:YAG nanopowder and YAG nanopowder (doping amount of 1at% Nd), respectively dissolve them in 200 ethanol solution, add 0.5wt% ammonium polymethacrylate dispersant, 0.5wt % Sintering aid TEOS, according to the material: ball: water=1:5:3 ratio of ball milling, using nylon ball and nylon tank to mix ball milling for 60 hours, ball milling speed 300r / min; pour the ball milled slurry into 15μm aperture Ultrasonic filtration is performed in the sample, 5MHz ultrasonic frequency is selected, 80% output ultrasonic power, 10 seconds off every 1 minute of ultrasonic, intermittent ultrasonic, ultrasonic for a total of 10 minutes; take the sieved suspended solid slurry, dry in an oven at 90 ℃, and the powder After crushing and debinding at 700°C under oxygen atmosphere for 5 hours, the sorted powder is obtained. Weigh 50g of the separated Nd: YAG nano powder and 20g YAG nano powder, and add 0.8wt% dispersant ammonium polyacrylate, 0.3wt% binder polyvinyl...

Embodiment 2

[0035] Weigh the commercially available high-purity powder Y according to the stoichiometric ratio 2 O 3 :39.8328g, Al 2 O 3 :30.585g, Nd 2 O 3 :1.2114g (2at%Nd doping amount), Sm 2 O 3 :(2at% Sm doping amount) add 0.2wt% MgO sintering aid, 0.5wt% dispersant polyacrylic acid (PAA), 0.2wt% binder carboxymethyl cellulose (CMC), 0.5wt% increase Plasticizer PEG-400, 0.5wt% defoaming agent n-butanol; pour raw materials, grinding balls, and ball mill additives into 150 grams of deionized water and ball mill and mix for 24 hours, ball mill speed 350r / m, material: ball = 1:5. Put the ball mill mixed slurry into a vacuum tank, and stir for 30 minutes with a vacuum degree of -0.1pa or less, until no bubbles escape in the slurry; Nd 2 O 3 The doped and defoamed slurry is injected into the center of the gypsum mold. After the gypsum mold is finished, remove the frame and inject Sm into the outer ring 2 O 3 The doped slurry, wait for the green body to shrink and separate the gypsum mold, and ...

Embodiment 3

[0044] Weigh three parts of high purity powder Y according to the stoichiometric ratio 2 O 3 :39.8328g, Al 2 O 3 :30.585g, Nd 2 O 3 :0.6057g (1at% Nd doping amount), add 0.2wt% MgO sintering aid, Cr 2 O 3 : (0.5at% Cr doping), add 0.25wt% CaO sintering aid, 0.5wt% dispersant polycarboxylic acid, 0.25wt% binder methyl cellulose (MC), 0.5wt% plasticization PEG-2000, 1wt% defoamer methanol; pour the raw materials, grinding balls, and ball mill additives into 150 g of deionized water and ball mill and mix for 24 hours, the ball mill speed is 350r / m, material: ball=1:5; after mixing the ball mill Put the slurry into a vacuum tank and stir for 30 minutes until no bubbles escape in the slurry. The long strip of gypsum mold is divided into three or five sections with plastic partitions and injected into pure

[0045] YAG slurry, Nd 2 O 3 Doped paste, Cr 2 O 3 The slurry is doped, after the gypsum mold is finished absorbing the slurry, the partitions are removed and the slurry is used to f...

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Abstract

The invention provides a method for preparing yttrium aluminium garnet (YAG) transparent ceramic with a composite structure. The method comprises the following steps: by using Re:YAG powder and high-purity Y2O3, Al2O3 and Re2O3 as raw materials, adding a certain amount of dispersing agent, binder, plasticizer and defoaming agent to mix slurry in a ball-milling manner; preparing different doped and bound composite structures of ceramic biscuits, such as Sm:YAG / Nd:YAG, Cr:YAG / Yb:YAG and YAG / Nd:YAG, different multi-segment doped Re:YAG ceramic biscuits, such as YAG / Cr:YAG / Nd:YAG / YAG, a core-shell structured composite ceramic biscuit, and a layered composite structure of transparent ceramic biscuit in a vacuum pressure slip casting manner. Different composite structures of Re:YAG transparent ceramics are obtained by the following processing steps: biscuit degreasing, vacuum sintering, hot isostatic pressing sintering, annealing and the like. The linear transmittance of the transparent ceramic after being polished at double sides in a visible near infrared region can be up to over 80%.

Description

Technical field [0001] The invention provides a method for preparing polycrystalline transparent ceramics with a Re: YAG composite structure, and belongs to the technical field of special optical ceramic molding and manufacturing processes. Background technique [0002] In a solid-state laser system, part of the pump energy absorbed by the laser gain medium is converted into heat and deposited inside the medium, which requires heat dissipation and cooling on the surface, which creates a temperature gradient and thermal stress inside the laser material, which causes the refractive index of the medium. Changes. On the one hand, excessive thermal stress will cause the medium to burst, which restricts the increase of pump power density, which in turn affects the increase of output laser energy and repetition frequency; on the other hand, thermally induced wavefront distortion (thermal lens effect, etc.), thermally induced birefringence Depolarization leads to a decrease in beam qual...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/622
Inventor 郭旺曹永革黄秋凤费斌杰陈剑张大财
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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