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Alcohol-water compounded solvents coprecipitation method of preparing yttrium aluminium garnet nano-powder

A technology of yttrium aluminum garnet and nano-powder is applied in rare earth metal compounds, chemical instruments and methods, alumina/aluminum hydroxide and other directions, which can solve the problems of complicated operation and constant pH value of difficult systems, and achieves simple process, Easy to operate, low cost effect

Inactive Publication Date: 2007-02-07
SICHUAN UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen from the above that the technical solution adopts the co-dropping method, and the pH value of the system needs to be kept constant by adjusting the titration rate of ammonia water during the reaction process, so the operation is complicated and it is difficult to keep the pH value of the system constant

Method used

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  • Alcohol-water compounded solvents coprecipitation method of preparing yttrium aluminium garnet nano-powder
  • Alcohol-water compounded solvents coprecipitation method of preparing yttrium aluminium garnet nano-powder
  • Alcohol-water compounded solvents coprecipitation method of preparing yttrium aluminium garnet nano-powder

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Embodiment 1

[0025] 0.03mol Y(NO 3 ) 3 and 0.05mol NH 4 Al(SO 4 ) 2 Dissolved in 600ml deionized water to prepare Al 3+ Concentration is 0.083mol / L mixed salt solution, and the volume ratio of ethanol and water is 1: 1 ethanol-water composite solvent preparation 2000ml concentration is 0.4mol / L NH 4 HCO 3 solution; titrate the prepared mixed salt solution to 2000ml NH at a rate of 200ml / h under normal pressure and 15°C 4 HCO 3The solution was stirred continuously during the titration. After the titration, age at normal pressure and 15°C for 8 hours; vacuum filter the aged precipitation solution to obtain a milky white precipitate, then wash the precipitate with deionized water for 3 times to remove impurity ions, and then Wash twice with absolute ethanol to remove water; put the washed white precipitate into a drying oven, and dry at normal pressure and 90°C for 24 hours to obtain a YAG precursor. Divide the YAG precursor into three parts, respectively ℃, 1000℃, 1100℃ for 2 hours,...

Embodiment 2

[0028] 0.072mol Y(NO 3 ) 3 and 0.12mol Al((NO 3 ) 3 Dissolved in 600ml deionized water to prepare Al 3+ Concentration is 0.2mol / L mixed salt solution, and the volume ratio of ethanol and water is 0.2:1 ethanol-water composite solvent to prepare 1200ml of NH with a concentration of 1.5mol / L 4 HCO 3 solution; titrate the prepared mixed salt solution to 1200ml NH at a rate of 180ml / h under normal pressure and 15°C 4 HCO 3 The solution was stirred continuously during the titration. After the titration, age at normal pressure and 15°C for 10 hours; vacuum filter the aged precipitate solution to obtain a white precipitate, then wash the precipitate 3 times with deionized water to remove impurity ions, and then Wash twice with absolute ethanol to remove water; put the washed white precipitate into a drying oven, and dry at normal pressure and 90°C for 24 hours to obtain a YAG precursor. Divide the YAG precursor into three parts, respectively ℃, 1000℃, 1100℃ for 3 hours, and t...

Embodiment 3

[0030] 0.03mol YCl 3 and 0.05mol NH 4 Al(SO 4 ) 2 Dissolved in 2000ml deionized water to make Al 3+ Concentration is 0.025mol / L mixed salt solution, and the volume ratio of ethanol and water is 0.5:1 ethanol-water composite solvent to prepare 800ml of NH with a concentration of 1mol / L 4 HCO 3 solution; titrate the prepared mixed salt solution to 800ml NH 4 HCO 3 The solution was stirred continuously during the titration. After the titration is finished, age at normal pressure and 10°C for 5 hours; carry out vacuum suction filtration to the aged precipitate solution to obtain a white precipitate, then wash the precipitate with deionized water 3 times to remove impurity ions, and then Wash twice with absolute ethanol to remove water; put the washed white precipitate into a drying oven, dry at normal pressure and 90°C for 24 hours to obtain a YAG precursor, and roast the YAG precursor at 1000°C for 2 hours to obtain The product is detected by X-ray diffractometer (XRD, D / ...

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Abstract

A preparation method for yttrium aluminum garnet (YAG) nanoparticles by alcohol-water solvent coprecipitation comprises: (1) dissolving yttrium salt and aluminum salt in deionized water to obtain a mixed salt solution with aluminum ion concentration of 0.025~0.2 mol / L, and dissolving ammonium bicarbonate in ethanol-water solvent to obtain a sediment solution with ammonium bicarbonate concentration of 0.4~2 mol / L, (2) titrating the mixed salt solution into the sediment solution under atmospheric pressure at 5-20DEG C and then aging for at least five hours, (3) vacuum-filtering, washing, and drying to YAG precursor, and (4) torrefying the precursor at 900DEG C for 2-3 hours to obtain YAG nanopowders. This method is simple and easy to control conditions, and can prepare single-phase YAG nanopowders stably, which lays a good foundation for industrial production.

Description

technical field [0001] The invention belongs to the field of preparing nano powder by precipitation method, in particular to a composite solvent co-precipitation method for preparing yttrium aluminum garnet nano powder. Background technique [0002] Yttrium aluminum garnet (referred to as YAG, chemical formula is Y 3 Al 5 o 12 ) Nanopowder is an important raw material for preparing YAG transparent ceramics. As we all know, the preparation of YAG transparent ceramics can make up for the shortcomings in the preparation of YAG single crystals, and has the same excellent optical properties as single crystals. It is a more competitive laser host material to replace single crystals. YAG ceramics also have excellent high-temperature mechanical properties and can be widely used as high-temperature structural components. In addition, doped Eu 3+ 、Ce 3+ and Tb 3+ The YAG powder is a very good phosphor material, used in cathode ray tubes and so on. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C01F7/02C04B35/50
Inventor 仝世红卢铁城郭旺
Owner SICHUAN UNIV
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