Preparation method for vacuum sintering of YAG-based crystalline ceramic under existence of non-silicon additive

A technology for transparent ceramics and vacuum sintering, which is applied in the field of vacuum sintered yttrium aluminum garnet-based transparent ceramics, achieving obvious effects, solving the effects of large grain size and reasonable grain size distribution.

Inactive Publication Date: 2017-12-15
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the existing problems, the present invention provides a method for preparing non-silicon additive system YAG-based transparent ceramics by vacuum sintering, thereby solving the problems existing in the prior art

Method used

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  • Preparation method for vacuum sintering of YAG-based crystalline ceramic under existence of non-silicon additive
  • Preparation method for vacuum sintering of YAG-based crystalline ceramic under existence of non-silicon additive
  • Preparation method for vacuum sintering of YAG-based crystalline ceramic under existence of non-silicon additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] ①The commercially available concentration of 99.999% Y 2 o 3 ,99.999% Al 2 o 3 and 99.999% Cr 2 o 3 press Y 3 (Cr 0.003 Al 0.997 ) 5 o 12 After weighing the stoichiometric ratio, place it in a ball mill jar, then add 0.20mol% La 2 o 3 and 0.20mol% MgO as a sintering aid, 0.3wt% DS005 as a dispersant, adding absolute ethanol to configure a slurry with a solid content of 40%.

[0038] ②Put the slurry obtained in step ① on a planetary ball mill and mix for 10 hours at a speed of 220r / min. Dry the slurry after ball milling at 50°C for 36h, and sieve the dried precursor with 80 Sieve through a mesh sieve 3 times.

[0039] ③The sieved powder obtained in step ② was placed in a stainless steel mold, and pressed into a disc by 60 MPa dry pressing, and then subjected to 180 MPa cold isostatic pressing to obtain a biscuit, and the holding time was 15 minutes. The green body was calcined at 700°C in an air atmosphere, kept for 6 hours, and cooled to 20°C. The heating ...

Embodiment 2

[0042] ①The commercially available concentration of 99.99% Y 2 o 3 ,99.99% Al 2 o 3 ,99.99% Nd 2 o 3 and 99.99 Cr 2 o 3 Press (Nd 0.01 Y 0.99 ) 3 (Cr 0.001 Al 0.999 ) 5 o 12 After the stoichiometric ratio was weighed, it was placed in a ball mill jar, and then 0.02mol% La was added 2 o 3 and 0.03mol MgO as a sintering aid, 1wt% DS005 as a dispersant, adding absolute ethanol to configure a slurry with a solid content of 30%.

[0043] ②Put the slurry obtained in step ① on a planetary ball mill for ball milling and mixing for 6 hours at a speed of 280r / min. After the ball milling, dry the slurry at 120°C for 10 hours, and sieve the dried precursor with a 50 Sieve through a mesh sieve 4 times.

[0044] ③The sieved powder obtained in step ② was placed in a stainless steel mold, and pressed into a disc by 100 MPa dry pressing, and then subjected to 100 MPa cold isostatic pressing to obtain a biscuit, and the holding time was 20 minutes. The green body was calcined a...

Embodiment 3

[0047] ①The commercially available concentration of 99.999% Y 2 o 3 ,99.999% Al 2 o 3 and 99.999% Yb 2 o 3 Press (Yb 0.3 Y 0.7 ) 3 Al 5 o 12 After weighing the stoichiometric ratio, place it in a ball mill jar, then add 0.25mol% La 2 o 3 and 0.25mol% MgO as a sintering aid, 0.1wt% DS005 as a dispersant, adding absolute ethanol to configure a slurry with a solid content of 65%.

[0048] ②Put the slurry obtained in step ① on a planetary ball mill and mix for 18 hours at a speed of 120r / min. After the ball milling, dry the slurry at 40°C for 48h, and sieve the dried precursor, using 200 Sieve through a mesh sieve once.

[0049] ③The sieved powder obtained in step ② was placed in a stainless steel mold, pressed into a disc by 40Mpa dry pressing, and then subjected to 250MPa cold isostatic pressing to obtain a biscuit, and the holding time was 5min. The green body is calcined at 1000°C in an air atmosphere, kept for 2 hours, and cooled to 40°C. The heating rate of the...

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Abstract

The invention belongs to the technical field of ceramic preparation and application and specifically relates to a method for vacuum sintering of an yttrium aluminum garnet (Y3Al5O12, YAG) based crystalline ceramic under the existence of a non-silicon additive. The crystalline ceramic is prepared from MgO and La2O3 as co-sintering agents in the manner of vacuum sintering under the existence of the non-silicon additive. According to the invention, a vacuum sintering method is adopted for preparing a non-silicon additive system YAG crystalline ceramic, no gas-aided expensive pressure sintering equipment is required and the economical energy-saving effect is obvious. According to the invention, the preparation for fine grain YAG crystalline ceramic is realized, the grain size distribution is reasonable and no abnormal crystal grain grows. The problem of larger size of the silicon additive system YAG crystalline ceramic is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of ceramic preparation and application, in particular to a vacuum sintered yttrium aluminum garnet (Y 3 al 5 o 12 , YAG)-based transparent ceramics. Background technique [0002] With its advantages of high peak power, high efficiency, long life, safety and reliability, solid-state lasers have taken a leading position in the field of laser applications, and are widely used in the fields of national defense, industrial processing, and scientific research. At present, developed countries such as Europe and the United States strongly support the development of solid-state laser technology with the strength of the country. my country has also included it in the "National Medium and Long-Term Science and Technology Development Program (2006-2020)" among the eight cutting-edge technologies. The core component of a solid-state laser is the gain medium, which plays a decisive role in the performance of the laser ...

Claims

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Application Information

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IPC IPC(8): C04B35/44C04B35/505C04B35/64C04B35/622
CPCC04B35/44C04B35/505C04B35/622C04B35/64C04B2235/3206C04B2235/3217C04B2235/3224C04B2235/3227C04B2235/3241C04B2235/9653
Inventor 张乐周天元邵岑孙炳恒高光珍王骋陈浩
Owner XUZHOU NORMAL UNIVERSITY
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