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Method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing forming

A direct-writing molding, transparent ceramic technology, applied in ceramic molding machines, manufacturing tools, energy-saving lighting, etc., can solve the problem that complex shapes cannot be prepared at the same time, and achieve the effect of solving cracking and delamination, high yield rate and fast preparation rate

Pending Publication Date: 2022-08-05
XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the key technical problem that composite structures and complex shapes cannot be prepared at the same time, and to improve the preparation technology of transparent ceramics, the present invention provides a method for preparing YAG-based transparent ceramics by direct writing molding

Method used

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  • Method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing forming
  • Method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing forming
  • Method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing forming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Preparation of YAG transparent ceramics

[0041] (1) 500g Y according to the preparation 3 Al 5 O 12 The stoichiometric ratio of each element, respectively weighing Y 2 O 3 285.297g and Al 2 O 3214.703g, add 0.5g PEI as dispersant, add 2.5g sintering aid TEOS and 0.5g sintering aid MgO;

[0042] (2) the powder obtained in step (1) is subjected to planetary ball milling, the ball milling time is 15h, the solvent is dehydrated alcohol, and the material of the ball milling tank is nylon; the obtained slurry is dried and sieved, and the sieving mesh number is 100 respectively. , 200, 500 mesh;

[0043] (3) calcining the powder obtained in step (2), the calcining temperature is 600° C., the holding time is 10h, the calcining environment is an air atmosphere, and the calcining container is an alumina crucible;

[0044] (4) The 500-mesh calcined powder obtained in step (3) and the polyelectrolyte dispersant are prepared into a slurry, the solid content of t...

Embodiment 2

[0053] Example 2: Preparation of 0.1 at% Ce:YAG transparent ceramics

[0054] (1) According to the preparation 500g (Y 0.999 Ce 0.001 ) 3 Al 5 O 12 The stoichiometric ratio of each element, respectively weighed commercial 0.435g CeO 2 , 284.938g of Y 2 O 3 and 214.647g of Al 2 O 3 , adding 0.75g PEI as dispersant, adding 0.5g sintering aid TEOS and 0.5g sintering aid MgO;

[0055] (2) the powder obtained in step (1) is subjected to planetary ball milling, the ball milling time is 15h, the solvent is dehydrated alcohol, and the material of the ball milling tank is nylon; the obtained slurry is dried and sieved, and the sieving mesh number is 100 respectively. , 200, 500 mesh;

[0056] (3) calcining the powder obtained in step (2), the calcining temperature is 800°C, the holding time is 6h, the calcining environment is an air atmosphere, and the calcining container is an alumina crucible;

[0057] (4) The 500-mesh calcined powder obtained in step (3) and the polyelect...

Embodiment 3

[0064] Example 3: Preparation of 0.6 at% Cr:YAG transparent ceramics

[0065] (1) 500g Y according to the preparation 3 (Al 0.994 Cr 0.006 ) 5 O 12 The stoichiometric ratio of each element, respectively weighing 1.919g of commercial Cr 2 O 3 , 284.937g of Y 2 O 3 and 214.145g of Al 2 O 3 , adding 1.0g of PEI as a dispersant, adding 0.5g of sintering aid TEOS and 0.5g of sintering aid MgO;

[0066] (2) the powder obtained in step (1) is subjected to planetary ball milling, the ball milling time is 15h, the solvent is dehydrated alcohol, and the material of the ball milling tank is nylon; the obtained slurry is dried and sieved, and the sieving mesh number is 100 respectively. , 200, 500 mesh;

[0067] (3) calcining the powder obtained in step (2), the calcining temperature is 900° C., the holding time is 3h, the calcining environment is an air atmosphere, and the calcining container is an alumina crucible;

[0068] (4) The 500-mesh calcined powder obtained in step (...

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Abstract

The invention discloses a method for preparing YAG (yttrium aluminum garnet)-based transparent ceramic by direct writing. The method comprises the following steps: ball-milling and mixing an organic solvent, a dispersing agent A, a sintering aid and ceramic powder, drying, sieving with a 100-mesh sieve, a 200-mesh sieve and a 500-mesh sieve, and calcining to obtain raw material powder; the 500-mesh calcined powder, a polyelectrolyte dispersing agent and deionized water are subjected to ball milling and mixing, and slurry B is obtained; the 100-mesh calcined powder, 3-8 wt% of PVP aqueous solution and a dispersing agent B are subjected to ball-milling mixing, then the 200-mesh calcined powder is added, ball milling is continued, and slurry C is obtained; the slurry C and the slurry B are subjected to ball milling mixing according to the mass ratio of 3.5-5.5; vacuum defoaming, direct writing forming and glue discharging are carried out; and carrying out vacuum sintering, annealing and processing on the biscuit subjected to glue removal to obtain the YAG transparent ceramic. The YAG-based ceramic biscuit prepared by the method does not need cold isostatic pressing and warm isostatic pressing, controllable preparation of a transparent ceramic material with a composite structure and a complex shape is realized at the same time, the product preparation speed is high, the yield is high, and the application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of preparation of advanced optical function transparent ceramics, in particular to a method for preparing YAG-based transparent ceramics by direct writing. Background technique [0002] Yttrium Aluminum Garnet (abbreviation: Y 3 Al 5 O 12 , YAG) has excellent optical, thermal and mechanical properties, and is widely used in high-temperature structural materials and light-emitting host materials. In the lattice of YAG, Y 3+ unique electronic structure that enables it to be combined with Y 3+ Ions with similar ionic radii are easily replaced by heterogeneous ions (cations) in solid solution. Therefore, YAG is usually used as a host material to achieve its own luminescence by doping other luminescent ions. [0003] With the development of high-end equipment industry, the application demand of special-shaped structural parts has gradually increased, which directly puts forward new requirements for YAG matr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C04B35/626C04B35/632C04B35/634C04B35/64B28B1/00B33Y70/10
CPCC04B35/44C04B35/62645C04B35/6264C04B35/632C04B35/63444C04B35/64B28B1/001B33Y70/10C04B2235/9653C04B2235/3225C04B2235/3224C04B2235/3206C04B2235/3208C04B2235/445C04B2235/6026Y02B20/00
Inventor 张乐邵岑邱凡陈士卫周天元王忠英黄国灿魏帅李延彬李明洲康健刘鑫陈浩
Owner XINYI XIYI ADVANCED MATERIALS RES INST OF IND TECH CO LTD
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