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Prepn process of non-aggregate nanometer doped YAG powder

A technology of yttrium aluminum garnet and nanopowder, which is applied in the preparation of alkali metal aluminate/alumina/aluminum hydroxide, chemical instruments and methods, crystal growth, etc., can solve problems such as unsatisfactory effects, and achieve low cost Low, good effect, easy effect of doping rare earth ions

Inactive Publication Date: 2005-04-27
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ammonium bicarbonate is also used as a precipitant, but ammonium sulfate is not introduced as an auxiliary agent, and the effect is not ideal

Method used

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  • Prepn process of non-aggregate nanometer doped YAG powder
  • Prepn process of non-aggregate nanometer doped YAG powder
  • Prepn process of non-aggregate nanometer doped YAG powder

Examples

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Effect test

example 1

[0020] Put Y(NO 3 ) 3 and Al(NO 3 ) 3 Dissolve in distilled water respectively, the concentrations of yttrium and aluminum ions are 0.3 mol / L and 0.5 mol / L respectively, mix these two solutions according to the metal ion molar ratio of 3:5, under stirring, add excess ammonium bicarbonate dropwise solution (concentration is 0.5mol / L), a colloidal precipitate is obtained after completion, and the pH value is about 8. Suction filtration, washed twice with distilled water, washed twice with absolute ethanol, dried at 110°C for 4 hours, ground, sieved, then placed in a high-temperature furnace, calcined at 1200°C for 4 hours, and the average particle size of the obtained pure YAG powder was 50 nm.

example 2

[0022] Put Y(NO 3 ) 3 , Nd(NO 3 ) 3 and Al(NO 3 ) 3 Dissolve in distilled water respectively, the concentrations of yttrium, neodymium and aluminum ions are 0.3mol / L, 0.1mol / L and 0.5mol / L respectively, mix these three solutions according to the molar ratio of metal ions at 2.9:0.1:5.0, stir Next, add dropwise to excess ammonium bicarbonate solution (concentration is 0.5mol / L), and after the completion, a colloidal precipitate is obtained, and the pH value is about 8. Suction filtration, washed twice with distilled water, washed twice with absolute ethanol, dried at 110°C for 4 hours, ground, sieved, and then placed in a high-temperature furnace, calcined at 1200°C for 4 hours to obtain the average particle size of neodymium-doped YAG powder is 50 nm. X-ray fluorescence analysis (XRF) shows that the molar concentration ratio (atom%) Y:Nd of yttrium and neodymium in the powder is about 30:1.

example 3

[0024] Put Y(NO 3 ) 3 , Nd(NO 3 ) 3 and Al(NO 3 ) 3 respectively dissolved in distilled water, the concentrations of yttrium, neodymium and aluminum ions were 0.3mol / L, 0.1mol / L and 0.5mol / L respectively, and these three solutions were mixed according to the metal ion molar ratio of 2.9:0.1:5.0, and Add 0.1mol / L ammonium sulfate solution (addition amount is about 10% of the molar weight of yttrium ion), under stirring, add dropwise in excessive ammonium bicarbonate solution (concentration is 0.5mol / L), after finishing, colloidal precipitation is obtained, The pH is around 8. Suction filtration, washed twice with distilled water, washed twice with absolute ethanol, dried at 110°C for 4 hours, ground, sieved, and then placed in a high-temperature furnace, calcined at 1200°C for 4 hours to obtain the average particle size of neodymium-doped YAG powder is 30 nm. X-ray fluorescence analysis (XRF) shows that the molar concentration ratio (atom%) Y:Nd of yttrium and neodymium ...

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Abstract

The present invention belongs to the field of fine chemical technology, and features that the doped YAG powder is prepared with Y, Al and doping RE nitrate aqua as material and ammonium bicarbonate as precipitant and through precipitation, filtering, drying, and calcining at 900-1300 deg.c. The preparation process of the doped YAG powder with no aggregate, no hetero phase, high purity, narrow size distribution about 30 nm has the preparation process with no inorganic salt added, no surfactant added and no vacuum drying and freeze drying adopted. The preparation process is stable, low in cost, high in powder quality and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of fine chemical industry, in particular to a preparation method of doped yttrium aluminum garnet nano powder. Background technique [0002] Yttrium aluminum garnet (YAG) crystal is a kind of laser dielectric material with excellent performance. Special equipment and complex process are required to grow YAG crystal, and the crystal size is limited. At the same time, due to segregation, the concentration of doped active ions-rare earth ions should not be too high , affecting the improvement of laser conversion efficiency. The cost of polycrystalline transparent ceramics is low, and it is easy to prepare large-sized blocks and high-concentration dopant ions. Therefore, transparent YAG ceramics have become a potential substitute for YAG crystals. The preparation of transparent doped YAG ceramics requires high-quality doped YAG powder, that is, the powder has high purity, small particle size, narrow particle size distrib...

Claims

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Application Information

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IPC IPC(8): C01F7/47C04B35/44C30B29/28
Inventor 周有福许颜清洪茂椿陈长章李定
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI