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Method of synthesizing (Y, Gd)2O3:Eu phosphor through microwave radiation

A microwave radiation method and a luminescent material technology, which is applied in the field of microwave radiation 2O3:Eu luminescent material preparation, can solve the problems of long time required, uneven size agglomeration, large size of yttrium oxide (europium) nanoparticles, etc. The effect of short time, uniform size, shape and size adjustable

Inactive Publication Date: 2011-03-09
NANJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method is more complicated and takes a long time. The size of the prepared yttrium oxide (europium) nanoparticles is relatively large, the dispersion is relatively poor, and the phenomenon of uneven size and agglomeration is serious.
It is less easy to control the morphology when synthesized in large quantities, so it is not suitable for industrialization

Method used

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  • Method of synthesizing (Y, Gd)2O3:Eu phosphor through microwave radiation
  • Method of synthesizing (Y, Gd)2O3:Eu phosphor through microwave radiation
  • Method of synthesizing (Y, Gd)2O3:Eu phosphor through microwave radiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Configured with 10mM Re(NO 3 ) 3 (Re=Y, Gd, Eu; element molar ratio Y:Gd:Eu=14.25:4.75:1) 30ml of rare earth salt solution, add 30ml of ethylene glycol, then add oxalic acid and stir to dissolve, the final concentration of oxalic acid is 60mM. Put the prepared reaction materials above into the microwave reaction chamber and control the microwave power to 15W for 30 minutes. The obtained precipitate was washed 5 times with distilled water, put into an oven and baked at 80°C for 6h, and then calcined at 700°C for 2h in a muffle furnace to obtain (Y, Gd) 2 o 3 : Powder of Eu.

[0023] The resulting powder is analyzed by X-ray diffraction to be a cubic phase structure (see figure 1 ), as can be seen from the figure, the resulting product is the same as the cubic phase Y 2 o 3 (JCPDS No.83-0927) corresponding.

[0024] Take a little (Y, Gd) 2 o 3 : Eu powder is placed in 10ml ethanol, ultrasonically dispersed in an ultrasonic cleaner for 2min. Drop on the copper sa...

Embodiment 2

[0027] Configured with 20mM Re(NO 3 ) 3 (Re=Y, Gd, Eu; element molar ratio Y:Gd:Eu=9:10:1) 20ml of rare earth salt solution, add 60ml of ethylene glycol, then add oxalic acid and stir to dissolve, the final concentration of oxalic acid is 75mM. The microwave power that uses is 30W, and other steps are identical with example 1, obtain (Y, Gd) 2 o 3 : The powder of Eu was observed by scanning electron microscope ( Figure 4) is a micron rod with a length of 15 μm and a width of about 100 nm.

Embodiment 3

[0029] Configured with 30mM Re(NO 3 ) 3 (Re=Y, Gd, Eu; element molar ratio Y:Gd:Eu=16:3:1) 10ml of rare earth salt solution, add 50ml of ethylene glycol, then add oxalic acid and stir to dissolve, the concentration of oxalic acid is 20mM. Calcining at a temperature of 1000° C. for 1 h, the other steps are the same as in Example 1 to obtain (Y, Gd) 2 o 3 : The powder of Eu was observed by scanning electron microscope ( Figure 5 ), with a shape of nanorods with a length of 2 μm and a width of about 20 nm.

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Abstract

The invention relates to a method of synthesizing (Y, Gd)2O3:Eu phosphor through microwave radiation. The rare-earth salt solution containing 5-30 mM Re3+ (Re=Y, Gd and Eu) is prepared in a reaction vessel. Glycol and oxalic acid are added in the solution and are stirred to dissolve. Then the solution is subject to microwave radiation in a microwave reactor. After being filtered, washed and dried, the deposition is calcined in a Muffle furnace to obtain (Y, Gd)2O3:Eu phosphor. The (Y, Gd)2O3:Eu phosphor obtained by utilizing the above method is of uniform size, while the morphology and the size thereof being changeable. The method also has the advantages of short reaction time and suitable for small scale production.

Description

technical field [0001] The present invention relates to a microwave radiation (Y, Gd) 2 o 3 The invention relates to a preparation method of Eu luminescent material, which belongs to the field of preparation of inorganic materials. Background technique [0002] Y 2 o 3 It is an important ceramic raw material and one of the rare earth oxides widely used in phosphors. Y 2 o 3 It has excellent heat resistance, corrosion resistance and high temperature stability, good stability to reducing medium, high dielectric constant, and can be made into polycrystalline ceramic material with excellent transparency. It is mainly used for windows, fairings and antennas of infrared missiles Covers, microwave substrates, insulating brackets, fiber doping, infrared generator shells, infrared lenses and other high-temperature windows, etc. Y 2 o 3 The ultra-fine particles can significantly improve the performance of the product, and it can be dispersed in the alloy to obtain a super hea...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 吕忆农戴沈华刘云飞夏丽莉闵辉华
Owner NANJING UNIV OF TECH
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