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Process for preparing mixed garnet base ceramic material

A ceramic material and garnet-based technology, which is applied in the field of preparation of mixed garnet-based ceramic materials, can solve the problems of low YAG yield, quenching of Nd luminescence concentration, and difficulty in finding materials, etc.

Inactive Publication Date: 2006-08-23
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

As a laser medium material, it is difficult to find a better material than YAG in terms of overall performance.
[0003] But YAG single crystal material also has some disadvantages
Its growth time is very long, and it takes 1 to 3 months to grow; due to the high melting point of YAG, it is necessary to use a more expensive Ir crucible as a container for single crystal growth; one of the grown YAG single crystal materials is The core part obtained by the growth of the small crystal face, the composition of this part is different from that of other parts, so the part that can be used is limited to the surrounding part of the preparation material, which leads to a low yield of YAG
When used as a laser host material, YAG is not an ideal garnet structure doped with Nd ions, because Nd 3+ The ionic radius of the ion is larger than the Y 3+ ions have a much larger ionic radius, this mismatch makes it difficult to form Nd 3 al 2 (AlO 4 ) 3 and Y 3 al 2 (AlO 4 ) 3 solid solution, which limits the amount of Nd ions entering the lattice, and the content of Nd ions in the YAG single crystals currently prepared does not exceed 1.1 at%.
In addition, due to the small distance of the lattice sites in YAG, when Nd ions enter the lattice, the concentration of Nd luminescence is quenched due to the strong interaction between Nd-Nd ions.

Method used

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  • Process for preparing mixed garnet base ceramic material
  • Process for preparing mixed garnet base ceramic material
  • Process for preparing mixed garnet base ceramic material

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Nd:Y 3 sc x Al (5-x) o 12 Preparation of mixed garnet transparent ceramics: Dissolve Y, Al, Sc, Nd nitrates in water to form a solution containing the required elements, and dilute to about 0.1mol / L with distilled water. Add ammonia water of sufficient concentration to this mixed solution under stirring, adjust the pH value to 7-8, stir to form a precursor of precipitation, and as a by-product of precipitation, stir this mixture for about 30 minutes until basically dissolved Y, Al, Sc, Nd are all precipitated out. The mixed solution was then washed with distilled water to remove by-products. Then dry in an oven for 8 hours to obtain the precursor of the desired powder. The calcination temperature is generally at 900°C and the time is 2 hours. After calcination, the desired oxide powder is obtained.

[0028] The oxide powder is pressed into blocks by dry pressing or balanced heating and pressing to increase the density of the green body. Mold materials should be ...

Embodiment 2

[0030] Ce:Lu 3 sc x Al (5-x) o 12 Preparation of mixed garnet transparent ceramics: Dissolve Lu, Al, Sc and Ce nitrates in water to form a nitrate solution in which required elements are dissolved, and filter to remove insoluble substances. Then add a certain amount of glycine to the solution, and heat at 100°C until the water is evaporated to dryness to obtain a transparent gel-like substance. Then transfer it to a muffle furnace at 500°C, the gelatinous substance will burn quickly and emit brown smoke. A brown powder remained. Then calcined at 1000° C. for 2 hours to prepare the oxide powder of the desired composition.

[0031] The oxide powder is pressed into blocks by dry pressing or balanced heating and pressing to increase the density of the green body. The green body is at 200Kg / cm 2 It is pressed and formed under the pressure, and after dry pressing, it is subjected to isostatic pressing (2000Kg / cm 2 ) treatment to further increase the density of the green body...

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Abstract

The preparation process of mixed garnet base ceramic material belongs to the field of light emitting ceramic material technology. The present invention selects relatively large ion to replace Al ion or Y ion so as to expand lattice constant and raising dopping concentration. The preparation process includes compounding powder in the required components, solid reaction or co-precipitation, combustion synthesis or spraying pyrolysis to prepare powder in the required components, and final sintering in reducing atmosphere or vacuum to obtain the polycrystalline mixed transparent garnet base ceramic material.

Description

technical field [0001] The invention relates to a preparation method of a mixed garnet-based ceramic material, belonging to the field of luminescent ceramic materials. technical background [0002] YAG garnet is a stable material with good thermal-mechanical properties and can withstand high temperature and thermal shock; its transparent range is wide (0.18-6μm), so it is a better luminescent matrix material. Since its discovery, it has been widely used as laser matrix material and scintillator material. As a laser medium material, it is difficult to find a better material than YAG in terms of overall performance. [0003] But YAG single crystal material also has some disadvantages. Its growth time is very long, and it takes 1 to 3 months to grow; due to the high melting point of YAG, it is necessary to use a more expensive Ir crucible as a container for single crystal growth; one of the grown YAG single crystal materials is The core part obtained by the growth of small c...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/10C04B35/50C04B35/64
Inventor 冯涛施剑林蒋丹宇
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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