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Method for preparing rare earth ion-doped garnet structure nanocrystals by laser irradiation

A rare earth ion, laser irradiation technology, applied in the directions of crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of agglomeration of garnet structure nanocrystals doped with rare earth ions, and achieve rapid synthesis guarantee, small size, small agglomeration effect

Active Publication Date: 2015-08-26
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of agglomeration of doped rare earth ion garnet structure nanocrystals in the high temperature calcination process in the prior art, and to provide a method to prepare rare earth ion doped crystals directly by laser irradiation without high temperature calcination. Method and device for garnet structured nanocrystals

Method used

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  • Method for preparing rare earth ion-doped garnet structure nanocrystals by laser irradiation
  • Method for preparing rare earth ion-doped garnet structure nanocrystals by laser irradiation
  • Method for preparing rare earth ion-doped garnet structure nanocrystals by laser irradiation

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Experimental program
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Effect test

Embodiment 1

[0040] The laser used in embodiment 1 is an OPO laser, the wavelength it sends is about 355nm, the frequency of the pulse is 1Hz, and the number of laser irradiation pulses is 200 pulses; the experimental device diagram is as follows figure 1 shown.

[0041] Example 1

[0042] The raw material neodymium oxide (Nd 2 o 3 ) dissolved in 1mol / L nitric acid (HNO 3 ) in 0.01mol / L neodymium nitrate (Nd(NO 3 ) 3 ) solution; Yttrium nitrate hexahydrate (Y(NO 3 ) 3 .6H 2 O) and aluminum nitrate nonahydrate (Al(NO 3 ) 3 .9H 2 O) were respectively dissolved in secondary deionized water to prepare 2mol / L yttrium nitrate (Y(NO 3 ) 3 ) solution and 5mol / L aluminum nitrate (Al(NO 3 ) 3 ) solution; measure 0.01mol / L of Nd(NO 3 ) 3 Solution 30mL, 2mol / L Y(NO 3 ) 3 Solution 14.85mL, 5mol / L Al(NO 3 ) 3 solution 10mL, and mix it uniformly to form a nitrate mixed solution; according to the molar ratio of citric acid and the sum of the moles of Y, Nd, and Al three metal ions is 1...

Embodiment 2

[0045] The raw material gadolinium oxide (Gd 2 o 3 ), Erbium oxide (Er 2 o 3 ), gallium oxide (Ga 2 o 3 ) into 5mol / L nitric acid (HNO 3 ), respectively prepared into 0.1mol / L gadolinium nitrate (Gd(NO 3 ) 3 ) solution, 2mol / L erbium nitrate (Er(NO 3 ) 3 ) solution, 2mol / L gallium nitrate (Ga(NO 3 ) 3 ) solution; measure 2mol / L of Er(NO 3 ) 3 Solution 3.75mL, 0.1mol / L Gd(NO 3 ) 3 Solution 75mL, 2mol / L Ga(NO 3 ) 3solution 12.5mL, and mix it uniformly to form a nitrate mixed solution; according to the molar ratio of citric acid and the sum of the moles of Gd, Er, and Ga three metal ions is 4:1, add 30.73 g citric acid to obtain a mixed solution of citric acid and nitrate, then add ammonia water dropwise to the mixed solution of nitrate to adjust the pH value to 2, and put the mixed solution of citric acid and nitrate with the adjusted pH value on a magnetic heating stirrer , stirring continuously under heating conditions, and adjusting the rotating speed of the ...

Embodiment 3

[0046] The laser used in embodiment 3 is an OPO laser and a femtosecond laser, and the wavelengths it sends are about 355nm and 800nm ​​respectively, and the frequency of the pulse is all set as 2Hz; the experimental device diagram is as follows image 3 shown.

[0047] Example 3

[0048] The raw material gadolinium oxide (Gd 2 o 3 ), neodymium oxide (Nd 2 o 3 ), gallium oxide (Ga 2 o 3 ) respectively dissolved in 10mol / L nitric acid (HNO 3 ), prepared as 0.5mol / L gadolinium nitrate (Gd(NO 3 ) 3 ) solution, 0.1mol / L neodymium nitrate (Nd(NO 3 ) 3 ) solution and 0.5mol / L gallium nitrate (Ga(NO 3 ) 3 ) solution; measure 0.5mol / L of Gd(NO 3 ) 3 Solution 17.1ml, 0.1mol / L Nd(NO 3 ) 3 Solution 4.5mL, 0.5mol / L Ga(NO 3 ) 3 solution 30mL, and mix it uniformly to form a nitrate mixed solution; according to the molar ratio of citric acid and the sum of the moles of Gd, Nd, and Ga three metal ions is 3:1, add 13.83g to the nitrate mixed solution Citric acid to obtain a ...

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Abstract

The invention relates to a method for preparing rare-earth-ion-doped garnet-structured nano-crystals through laser irradiation, and an apparatus thereof. The method is based on a sol-gel method. In a last stage of the preparation process, laser directly acts upon gel. According to the invention, raw materials are weighed according to chemical stoichiometric ratios, and are prepared into a nitrate solution. Citric acid is added into the nitrate solution; ammonia water is dropped for controlling the pH value; the mixed solution of nitrate and citric acid is heated and stirred, such that a transparent viscous gel is formed; and the transparent viscous gel is coated on a sheet material, and is irradiated by using laser, such that the rare-earth-ion-doped garnet-structured nano-crystals are prepared. According to the invention, the laser technology is introduced into the preparation of the garnet-structured nano-crystals, and characteristics of high energy and short action time of laser are fully utilized, such that the rare-earth-ion-doped garnet-structured nano-crystal materials with smaller agglomeration, better dispersion, smaller scales, and uniform distribution are adopted.

Description

technical field [0001] The invention relates to a preparation technology for preparing rare earth ion-doped nanocrystals, in particular to a method and device for preparing rare earth ion-doped garnet structure nanocrystals by laser irradiation, and belongs to the field of optical material preparation and optical processing. Background technique [0002] Rare earth is the abbreviation of rare earth element, which is a natural treasure endowed by nature to human beings. Rare earth ions corresponding to rare earth elements are widely doped into various matrix materials and used as active ions for laser working substances due to their unique properties such as thousands of energy levels and sharp spectral lines generated by energy level transitions. , has been greatly developed in the application of laser. Crystals with a garnet structure also have their unique properties, such as yttrium aluminum garnet (YAG) crystals, which have high melting point, high strength, high physic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/28C30B5/02
Inventor 冯国英李邦兴周寿桓
Owner SICHUAN UNIV