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Preparation method of Er: YAG polycrystal transparent ceramic material

A technology of ceramic materials and polycrystalline transparency, which is applied in the field of preparation of high-transparency and high-concentration Er:YAG transparent ceramic materials, can solve the problems of not reaching high optical properties, and achieve easy control, simple preparation process and equipment, and raw materials Effects from a wide range of sources

Inactive Publication Date: 2011-10-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main reason is that the optical properties of high-concentration Er:YAG ceramics have not yet reached a high level, and Er:YAG ceramics with a transmittance comparable to single crystals have not been reported.

Method used

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  • Preparation method of Er: YAG polycrystal transparent ceramic material
  • Preparation method of Er: YAG polycrystal transparent ceramic material
  • Preparation method of Er: YAG polycrystal transparent ceramic material

Examples

Experimental program
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Effect test

Embodiment 1～4

[0024] Such as figure 1 The shown process flow prepares four kinds of Er:YAG ceramics with different Er concentrations, and the erbium oxide powder Er 2 o 3 , Yttrium oxide powder Y 2 o 3 and alumina powder Al 2 o 3 According to the mass weighing required for preparing 60g of 30at%Er:YAG, 50at%Er:YAG, 70at%Er:YAG and 90at%Er:YAG, add 29ml absolute ethanol and 0.48g ethyl orthosilicate respectively, put put into different alumina pots for ball milling, the ball-to-material ratio is 3:1, the ball milling time is 10 h, and the ball mill speed is 120 rpm. After ball milling, put the slurry into a drying oven and dry it at 80°C. After the dried slurry is sieved, it is calcined in a muffle furnace at 600°C for 2h. The powder is pressed into a disc shape by axial pressing, and the pre-pressed disc is cold isostatically pressed at 250MPa, and kept in a vacuum sintering furnace at 1780°C for 30h (vacuum degree greater than 10 -3 Pa), and then annealed at 1450°C for 10h in a muff...

Embodiment 5

[0026] Such as figure 1 The shown technological process prepares Er:YAG ceramics, respectively makes erbium oxide powder Er 2 o 3 , Yttrium oxide powder Y 2 o 3 and alumina powder Al 2 o3 Weigh according to the mass required to prepare 60g of 60% Er:YAG, add 27ml of absolute ethanol and 0.46g of ethyl orthosilicate, put it into an alumina tank for ball milling, the ball-to-material ratio is 3:1, and the ball milling time is 12h. The rotating speed of the ball mill is 110rpm. After ball milling, the slurry was put into a drying oven to dry at 70°C, and the dried slurry was sieved and calcined in a muffle furnace at 700°C for 1 hour. The powder is pressed into a disc shape by axial pressure, and the pre-pressed disc is cold isostatic pressed at 220MPa, and kept in a vacuum sintering furnace at 1790°C for 25h (vacuum degree greater than 10 -3 Pa), and then annealed at 1500 °C for 10 h in a muffle furnace. The sintered Er:YAG ceramics are polished, and the linear transmitta...

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Abstract

The invention relates to a preparation method of an yttrium aluminum garnet (Er: YAG) transparent ceramic material with high light transmission and high concentration. The preparation method is characterized in that: the doping concentration of Er is 30 to 90at percent. The preparation method of the ceramic material comprises the following two processes of: (1) weighing erbium oxide powder, yttrium oxide powder and aluminum oxide powder according to the required doping concentration, performing ball milling and mixing on the powder, absolute ethanol, aluminum oxide grinding balls and n-hexyl silicate serving as a sintering auxiliary agent, drying and sieving the prepared slurry, calcining the slurry to remove organic residues, and performing dry pressing and cold isostatic pressing to obtain a biscuit; and (2) sintering the biscuit in vacuum, wherein the sintering temperature is 1,700 to 1,850 DEG C, the heat preservation time is 2 to 50 hours, the linear light transmittance of the sintered transparent ceramic in materials with thicknesses of 3 millimeters above visible and infrared bands is over 82 percent and equivalent to that of Er: YAG single crystal. The method has the advantages of wide raw material source, simplicity in process and convenience for control.

Description

technical field [0001] The invention relates to a method for preparing a high-transparency and high-concentration Er:YAG transparent ceramic material, belonging to the technical field of optical ceramic material preparation. Background technique [0002] As early as the 1960s, foreign countries have started research on Er:YAG laser crystals. In 1965, R. Pappalarodo conducted a detailed study on the spectrum and energy level characteristics of Er ions in Er:YAG crystals. In 1967, M.J.Weber theoretically calculated the spectral parameters of the Er:YAG absorption spectrum; in 1974, E.V.Zhavikov reported for the first time that the Er:YAG crystal doped with 30wt% was used at room temperature to obtain a 2.94μm Er laser output. Since the upper energy level lifetime (50-100μs) of the Er:YAG crystal is much shorter than the lower energy level lifetime (4-6ms) of the 2.94μm laser, it is not easy to achieve particle number inversion, and the concentration of activated ions is very ...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/44C04B35/505C04B35/50
Inventor 周军潘裕柏张文馨王亮沈毅强寇华敏刘文斌李江郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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