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Yttrium aluminium garnet and yttria double crystal transparent ceramic and method for making same

A technology of yttrium aluminum garnet and transparent ceramics, which is applied in the field of yttrium aluminum garnet and yttrium oxide double crystal phase transparent ceramics and their preparation, can solve the problems of limited application scope, low thermal conductivity and the like, and achieves the effect of widening the application scope

Inactive Publication Date: 2008-10-15
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

Although glass can easily be made into a large size, its thermal conductivity is an order of magnitude lower than that of single crystal, which greatly limits its application range.

Method used

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  • Yttrium aluminium garnet and yttria double crystal transparent ceramic and method for making same
  • Yttrium aluminium garnet and yttria double crystal transparent ceramic and method for making same
  • Yttrium aluminium garnet and yttria double crystal transparent ceramic and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] take Y 2 o 3 and Al 2 o 3 Powder, the molar ratio is 0.6005, alumina balls are used as grinding balls, anhydrous ethanol is used as solvent, orthosilicate ethyl ester is used as sintering aid, and they are put into an alumina pot for ball milling for 6 hours, and then the slurry Separate from the grinding balls, put the slurry into a drying oven and dry at 80°C, sieve the dried slurry, and press the powder into a 20±5mm round block by axial one-way pressure, pre-pressed The wafer is then cold isostatically pressed, kept in a vacuum sintering furnace at 1700±50°C for 50 hours, and the sintered YAG ceramics are surface ground and polished, and the light transmittance is 63.43%.

Embodiment 2

[0030] take Y 2 o 3 and Al 2 o 3 Powder, the molar ratio is 0.6270, alumina balls are used as grinding balls, anhydrous ethanol is used as solvent, orthosilicate ethyl ester is used as sintering aid, and they are put into an alumina pot for ball milling for 12 hours, and then the slurry Separate from the grinding balls, put the slurry into a drying oven and dry at 80°C, sieve the dried slurry, and press the powder into a 20±5mm round block by axial one-way pressure, pre-pressed The wafer is then cold isostatically pressed, kept in a vacuum sintering furnace at 1710±50°C for 15 hours, and the sintered YAG ceramics are surface ground and polished, and the light transmittance is 63.88%.

Embodiment 3

[0032] Take YAG and Y 2 o 3 , the mass ratio is 95:5, alumina balls are used as grinding balls, anhydrous ethanol is used as solvent, orthosilicate ethyl ester is used as sintering aid, and they are put into an alumina pot for ball milling for 20 hours, and then the slurry is The material and the grinding ball are separated, the slurry is put into a drying oven and dried at 80°C, the dried slurry is sieved, and the powder is pressed into a 20±5mm round block by axial one-way pressure, and pre-pressed The wafers were then cold isostatically pressed, kept in a vacuum sintering furnace at 1700±40°C for 15 hours, and the sintered YAG ceramics were surface ground and polished, and the light transmittance was 81.74%.

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Abstract

The invention relates to yttrium aluminum garnet and yttrium oxide double-crystal transparent ceramic as well as the preparation method thereof. The transparent ceramic is characterized in that the YAG and Y2O3 double-crystal transparent ceramic is prepared under the conditions that the weight percentage of yttrium aluminum garnet and yttrium oxide range from 60 percent to 99.99 percent, and the weight percentage of Y2O3 ranges from 40 percent to 39.9 percent. The preparation of the double-crystal transparent ceramic is mainly divided into two stages: firstly, YAG and Y2O3 are mixed with a milling medium, a grinding ball and sintering additives (0.01 to 5.0 wt percent of the sintering additives is further added), the slurry is dried to obtain composite powder, and the composite power is screened; and secondly, the composite powder is subjected to static pressure molding through dry pressing and temperature reduction, and is sintered under no pressure, the sintering temperature is 1,650 DEG C to 1,850 DEG C, and the holding time is 1 hour to 50 hours. The maximum transmission efficiency of the 2mm double-crystal transparent ceramic within the wave band of 400 nm to 1,100 nm can reach more than 81 percent. The preparation method has the advantages of wide raw material sources, simple process and convenient control. The double-crystal transparent ceramic is applicable to the laser and luminescence field by serving as matrix materials.

Description

technical field [0001] The present invention relates to a kind of yttrium aluminum garnet (YAG) and yttrium oxide (Y 2 o 3 ) twin crystal phase transparent ceramics and a preparation method thereof, belonging to the field of laser ceramics. Background technique [0002] Nd:YAG single crystal is currently the laser host material with the best performance, the largest output and the widest application. However, due to the long growth period, high price, small size and low doping concentration of single crystal grown by pulling method, its performance and application range are limited. Over the years, material scientists have tried to replace single crystals with glass and polycrystalline ceramics as laser working materials. Although glass can easily be made into a large size, its thermal conductivity is an order of magnitude lower than that of single crystal, which greatly limits its application range. Due to the scattering and absorption of light by the pores, impurities,...

Claims

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Application Information

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IPC IPC(8): C04B35/50C04B35/10C04B35/622
Inventor 刘文斌潘裕柏李江吴玉松郭景坤
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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