Yttrium-aluminium series small crystal transparent ceramic material and preparation method

A technology of transparent ceramics and small grains, which is applied in the field of yttrium aluminum series small grain transparent ceramic materials and preparation, can solve the problems of lack of, lack of preparation of non-cubic phase single-phase transparent ceramic materials, etc.

Inactive Publication Date: 2008-07-23
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, in Y 2 o 3 -Al 2 o 3 There are the following problems in the research of system transparent ceramics: lack of YAG transparent ceramics with nano-grain size, lack of preparation of non-cubic phase (YAP or YAM) single-phase transparent ceramic materials, lack of YAG 2 o 3 -Al 2 o 3 Preparation of system multiphase transparent ceramic materials

Method used

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  • Yttrium-aluminium series small crystal transparent ceramic material and preparation method
  • Yttrium-aluminium series small crystal transparent ceramic material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Taking near-stoichiometric ratio YAG as an example, the near-stoichiometric ratio YAG nano-transparent ceramics were prepared with high-purity (99.99%) YAG 2 o 3 and Al(NO 3 ) 3 For the raw material. Will Y 2 o 3 Dissolve in nitric acid to give Y(NO 3 ) 3 solution. Al(NO 3 ) 3 Al(NO) directly dissolved in deionized water 3 ) 3 solution. Mix the two solutions in proportion to obtain the original solution. Drop the prepared solution into dilute ammonia water and add ammonia water to maintain a constant pH value, control the pH value to 7 or 8, and obtain a precursor precipitate. Suction filter the precipitate, wash with water and ethanol repeatedly, and dry at 90°C. Grind the dried precursor through a 200-mesh sieve, and then calcinate at 950°C to obtain a powder. The powder is sintered in an SPS sintering furnace, the powder is loaded into a graphite mold, the mold is placed in the SPS furnace, a certain pressure is first applied, and then a pulse current ...

Embodiment 2

[0045] Taking near-stoichiometric ratio YAG as an example, the near-stoichiometric ratio YAG nano-transparent ceramics were prepared with high-purity (99.99%) YAG 2 o 3 and Al(NO 3 ) 3 For the raw material. Will Y 2 o 3 Dissolve in nitric acid to give Y(NO 3 ) 3 solution. Al(NO 3 ) 3 Al(NO) directly dissolved in deionized water 3 ) 3 solution. Mix the two solutions in proportion to obtain the original solution. Add 0.5wt% glycine to the prepared solution, and then burn it. The precursor obtained by combustion was ground through a 200-mesh sieve, and then calcined at 950°C to obtain a powder. The powder morphology is shown in Figure 3. The powder is formed by dry pressing and isostatic pressing, and then sintered in hydrogen. The sintering temperature is 1800°C-6H. Prepare transparent ceramics.

Embodiment 3

[0047] Taking near-stoichiometric ratio YAG as an example, the near-stoichiometric ratio YAG nano-transparent ceramics were prepared with high-purity (99.99%) YAG 2 o 3 and Al(NO 3 ) 3 For the raw material. Will Y 2 o 3 Dissolve in nitric acid to give Y(NO 3 ) 3 solution. Al(NO 3 ) 3 Al(NO) directly dissolved in deionized water 3 ) 3solution. Mix the two solutions in proportion to obtain the original solution. Spray the prepared solution into a calciner at 950°C with an ultrasonic spray device to prepare a powder, and then undergo heat treatment to obtain a powder. The powder is formed by dry pressing and isostatic pressing, and then sintered in vacuum. The sintering system adopts a two-step method. The temperature is raised to 1800°C within 5H and then cooled to 1600°C for 10H. Prepare transparent ceramics.

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Abstract

The invention relates to an yttrium-aluminum series of transparent ceramic material of small crystal and a preparation method, pertaining to the preparation of Y2O3A12O3 series of transparent ceramic. The method of the invention adopts sol gel, coprecipitation, combustion synthesis and spray pyrolysis to prepare the powder while adopts dry compression, iso-static pressing, slip casting, gel casting or electrophoretic deposition to prepare the bisque. The transparent ceramic with small crystal obtained by adopting vacuum sintering, hydrogen sintering, two-step sintering method, spark plasma sintering method and high pressure low temperature sintering method has the content of Y2O3 from 0 to 100 percent, the content of A12O3 from 100 to 0 percent, and the transparent ceramic pellet, the dimension of which is below 300 nm, thus having good transmittance performance.

Description

technical field [0001] The invention relates to a yttrium-aluminum series small-grain transparent ceramic material and a preparation method thereof, belonging to Y 2 o 3 -Al 2 o 3 Preparation of system transparent ceramics. technical background [0002] With the development of science and technology, the requirements for materials are getting higher and higher, and the exploration of new materials has become a research focus and focus. With the development of laser technology, the requirements for laser materials are getting higher and higher. For some materials that are difficult to prepare with single crystal technology, people began to use transparent ceramic technology to prepare, and achieved some results. In particle physics and medical devices, the exploration of new scintillation materials is also an eternal theme. In this process, some materials that are difficult to prepare by single crystal technology have also been encountered, and some good results have bee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/115C04B35/50C04B35/624
Inventor 冯涛施剑林蒋丹宇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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