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Tunable luminous rare-earth ion doped Mg2Al4Si5O18 fluorescence material and preparation method thereof

A mg2al4si5o18, 2al4si5o18 technology, applied in the direction of luminescent materials, chemical instruments and methods, etc.

Inactive Publication Date: 2018-03-02
NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ce 3+ and Eu 3+ Metal electron migration quenching effect between (Ce 3+ + Eu 3+ = Ce 4+ + Eu 2+ ) limits the Ce 3+ and Eu 3+ energy transfer between, which leads to the inability to adjust the Ce in the matrix 3+ and Eu 3+ doping concentration to adjust the Ce 3+ and Eu 3+ Luminescence peak intensity for tunable luminescence

Method used

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  • Tunable luminous rare-earth ion doped Mg2Al4Si5O18 fluorescence material and preparation method thereof
  • Tunable luminous rare-earth ion doped Mg2Al4Si5O18 fluorescence material and preparation method thereof
  • Tunable luminous rare-earth ion doped Mg2Al4Si5O18 fluorescence material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0024] A Tunable Luminescent Rare Earth Ion Doped Mg 2 Al 4 Si 5 o 18 fluorescent material, the general chemical formula of the fluorescent material is (Mg 1-x-y-z Ce x Tb y Eu z ) 2 Al 4 Si 5 o 18 , x, y, and z are mole fractions, and their values ​​are specifically x=0.05, y=0.05, z=0.05;

[0025]Its specific preparation method is: weigh MgO according to the stoichiometric ratio: 6.85 grams, Al 2 o 3 : 14.27 g, SiO 2 : 21.03 g, CeO 2 : 1.72 g, Tb 4 o 7 : 1.87 g, Eu 2 o 3 : 1.76 g, ground in an agate mortar, and then the mixed raw materials were added to a corundum crucible, under 95% N 2 / 5%H 2 Under a reducing atmosphere, sintered at 1200 ° C for 20 hours, after natural cooling, the product was ground in an agate mortar to obtain (Mg 0.85 Ce 0.05 Tb 0.05 Eu 0.05 ) 2 al 4 Si 5 o 18 fluorescent material. figure 2 is the photoluminescence emission spectrum of the present embodiment, Figure 7 In 1 is the CIE color coordinates of the light generate...

Embodiment 2

[0027] Example 2

[0028] A Tunable Luminescent Rare Earth Ion Doped Mg 2 al 4 Si 5 o 18 fluorescent material, the general chemical formula of the fluorescent material is (Mg 1-x-y-z Ce x Tb y Eu z ) 2 al 4 Si 5 o 18 , x, y, and z are mole fractions, and their values ​​are specifically x=0.05, y=0.10, z=0.05;

[0029] Its specific preparation method is: weigh MgO according to the stoichiometric ratio: 6.45 grams, Al 2 o 3 : 14.27 g, SiO 2 : 21.03 g, CeO 2 : 1.72 g, Tb 4 o 7 : 3.74 g, Eu 2 o 3 : 1.76 g, ground in an agate mortar, and then the mixed raw materials were added to a corundum crucible, under 95% N 2 / 5%H 2 Under a reducing atmosphere, sintered at 1500 ° C for 2 hours, after natural cooling, the product was ground in an agate mortar to obtain (Mg 0.80 Ce 0.05 Tb 0.10 Eu 0.05 ) 2 al 4 Si 5 o 18 fluorescent material. image 3 is the photoluminescence emission spectrum of the present embodiment, Figure 7 Middle 2 is the CIE color coordinate...

Embodiment 3

[0031] A Tunable Luminescent Rare Earth Ion Doped Mg 2 al 4 Si 5 o 18 fluorescent material, the general chemical formula of the fluorescent material is (Mg 1-x-y-z Ce x Tb y Eu z ) 2 al 4 Si 5 o 18 , x, y, and z are mole fractions, and their values ​​are specifically x=0.05, y=0.20, z=0.05;

[0032] Its specific preparation method is: weigh MgO according to the stoichiometric ratio: 5.64 grams, Al 2 o 3 : 14.27 g, SiO 2 : 21.03 g, CeO 2 : 1.72 g, Tb 4 o 7 : 7.48 g, Eu 2 o 3 : 1.76 g, ground in an agate mortar, and then the mixed raw materials were added to a corundum crucible, under 95% N 2 / 5%H 2 Sintering at 1400°C for 6 hours in a reducing atmosphere. After natural cooling, the product was ground in an agate mortar to obtain (Mg 0.70 Ce 0.05 Tb 0.20 Eu 0.05 ) 2 al 4 Si 5 o 18 fluorescent material. Figure 4 is the photoluminescence emission spectrum of the present embodiment, Figure 7 Middle 3 is the CIE color coordinates of the light generate...

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Abstract

The invention provides a method for realizing the tunable luminescence of a Ce<3+>, Tb<3+> and Eu<3+> doped dichroite structure Mg2Al4Si5O18 fluorescence material through an ion bridge, and belongs tothe technical field of luminescence materials. A chemical general formula of the fluorescence material is (Mg1-x-y-zCexTbyEuz)2Al4Si5O18, wherein the x, the y and the z are mol percentage; the x is greater than 0 and smaller than or equal to 0.1; the y is greater than 0 and smaller than or equal to 0.4; the z is greater than 0 and smaller than or equal to 0.1; photoluminescence spectra of Ce<3+>,Tb<3+> and Eu<3+> in Mg2Al4Si5O18 are respectively positioned in blue light, green light and red light regions; through the Ce to Tb to Eu energy transmission, the tunable luminescence at three chromatic light intensities of blue, green and red can be realized.

Description

technical field [0001] The invention relates to the technical field of fluorescent materials, in particular to a tunable luminescent rare earth ion doped Mg 2 Al 4 Si 5 o 18 Fluorescent material and its preparation method. Background technique [0002] Trivalent cerium ion doped yttrium aluminum garnet (YAG:Ce 3+ ) and blue light-emitting chip combination is currently the most widely used implementation in white LED. The white light produced by this method has a single color source, high color temperature and low color rendering index. Chips that emit ultraviolet / near ultraviolet light are combined with fluorescent materials that can be excited by ultraviolet / near ultraviolet light to produce red, green, and blue light to emit white light, which has the advantages of stable color and strong reproducibility. It is the development direction of white light LED one. Ce 3+ ions with 4f 1 Electronic configuration, presented as a banded emission from the d→f transition all...

Claims

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Application Information

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IPC IPC(8): C09K11/64
CPCC09K11/7792
Inventor 杨玉国王旭平刘冰邱程程张园园吕宪顺
Owner NEW MATERIAL INST OF SHANDONG ACADEMY OF SCI
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