Preparation of europium-doped yttrium borate spherical luminescent material

A spherical luminescence, yttrium europium borate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of reducing the brightness of phosphors, difficult to control the morphology, etc., and achieve the effect of uniform size and good dispersion.

Inactive Publication Date: 2008-11-05
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Calcination at high temperature is easy to cause sintering phenomenon. To obtain phosphor powder with suitable particle size and uniform distribution, it must be ground, but this will reduce the brightness of phosphor powder and it is difficult to control its shape [M.Ren et al.Chemisty of Materials 11(1999 ):1576-1580]

Method used

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  • Preparation of europium-doped yttrium borate spherical luminescent material
  • Preparation of europium-doped yttrium borate spherical luminescent material
  • Preparation of europium-doped yttrium borate spherical luminescent material

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Dissolve 0.3677g of yttrium nitrate hexahydrate and 0.0178g of europium nitrate hexahydrate in 100mL of deionized water, and stir to obtain a uniform mixed solution. The total concentration of yttrium ions and europium ions is 0.01 mol / liter, wherein europium ions account for 4% of the total moles. %; 0.0618g boric acid is added in the mixed solution, stirred to make it dissolve completely; in the mixed solution, the ratio of the molar number of boric acid to the sum of the molar number of soluble yttrium salt and europium salt is equal to 1; 0.1800g urea is added to the above solution, Stir well to dissolve; a colorless and transparent solution is obtained. Put this transparent solution into a stainless steel autoclave lined with polytetrafluoroethylene, the volume of the liner is 120mL; the hydrothermal reaction temperature is controlled at 120°C, and the reaction time is 24h; the treated solution is centrifuged, dried, and then Obtained europium-doped yttrium borate ...

Embodiment 2

[0022] Dissolve 15.0161g of yttrium chloride hexahydrate and 0.1832g of europium chloride hexahydrate in 100mL of deionized water, and stir to obtain a uniform mixed solution. The total concentration of yttrium ions and europium ions is 0.5 mol / liter, of which europium ions account for the total number of moles Add 3.0915g of boric acid into the mixed solution and stir to dissolve it completely; in the mixed solution, the ratio of the moles of boric acid to the sum of the moles of soluble yttrium salt and europium salt is equal to 1; add 6.00g of urea to the above solution, stirred thoroughly to dissolve; a colorless and transparent solution was obtained. Put this transparent solution into a stainless steel autoclave lined with polytetrafluoroethylene, the volume of the liner is 120mL; the hydrothermal reaction temperature is controlled at 400°C, and the reaction time is 30min; the treated solution is centrifuged and dried, and then Obtained europium-doped yttrium borate spher...

Embodiment 3

[0024] Dissolve 3.7918g of yttrium nitrate and 0.0446g of europium nitrate in 100mL of deionized water, stir to obtain a uniform mixed solution, the total concentration of yttrium ions and europium ions is 0.1 mol / liter, and wherein europium ions account for 1% of the total moles; 0.7420 Add 1g of boric acid into the mixed solution, stir to make it completely dissolved; in the mixed solution, the ratio of the moles of boric acid to the sum of the moles of soluble yttrium salt and europium salt is 1.2; add 1.80g of urea to the above solution, stir fully to make it Dissolved; a colorless and transparent solution was obtained. Put this transparent solution into a stainless steel autoclave lined with polytetrafluoroethylene, the volume of the liner is 120mL; the hydrothermal reaction temperature is controlled at 250°C, and the reaction time is 12h; the treated solution is centrifuged and dried, and then Obtained europium-doped yttrium borate spherical luminescent material: YBO 3 ...

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Abstract

The invention discloses a preparation method of a spherical luminescent material doped with europium-yttrium borate. Dissolve soluble yttrium salt and europium salt into deionized water to obtain a mixed solution; add borate into the solution to be fully dissolved; the ratio of the total mole number of the borate and the total mole number of the soluble yttrium salt is 1-1.5; add the precipitant into the solution to obtain a colorless and transparent solution. Put the solution into a stainless steel high pressure reactor provided with polytetrafluoroethylene lining; carry out hydrothermal reaction; centrifuge and dry the treated solution to obtain the material. The invention induces the generation of borate salt by decomposing the precipitant under high temperature by a simple hydrothermal method and forms yttrium borate luminescent material doped with europium and having special spherical shape, the molecular formula is YBO3: Eu<3+>. The ball size is uniform with the diameter between 100 nm to 1 Mum, thus having excellent dispersibility, and having a strongest red emission peak at 619 nm, which belongs to the 5 0-72 transition of an europium ion.

Description

technical field [0001] The invention relates to a preparation method of europium-doped yttrium borate spherical luminescent material. Background technique [0002] With the continuous development of the information society, color displays with high definition, large screen, light weight and thin body have become the main direction of people's consumption. Color plasma flat panel display (Plasma DisplayPanel, PDP) has achieved rapid development in recent years because of a series of characteristics such as active light emission, fast response speed, high brightness, large viewing angle, rich colors, and excellent environmental performance. [0003] The important part of the plasma display is made of vacuum ultraviolet fluorescent material, and the quality of the phosphor used is an important factor in determining the performance of the PDP [R.P.Rao et al.Journal of Luminescence 87-89(2000): 1260-1263]. It was found that europium-doped rare earth orthoborate (mainly YBO 3 :E...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 金达莱俞晓晶丁高松王龙成杜平凡王耐艳
Owner ZHEJIANG SCI-TECH UNIV
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