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A kind of preparation method of enhanced frequency conversion luminescent material

A technology of frequency conversion and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of mutual interference between noble metal nanoparticles and fluoride crystallite precipitation, glass devitrification, influence effect, etc., to improve the frequency conversion luminescence Efficiency, good light transmittance, frequency conversion luminous efficiency improvement effect

Inactive Publication Date: 2015-08-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the research results show that after the rare earth doped glass material containing noble metal elements and fluoride components is prepared by traditional melting technology, the precipitation of noble metal nanoparticles and fluoride crystallites will interfere with each other in the subsequent heat treatment process, eventually resulting in glass Devitrification, which will seriously affect the effect of actual use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: The preparation method of the enhanced frequency conversion luminescent material of this embodiment is as follows:

[0023] (1) Fully mix the powders of SiO2, Na2CO3, ZnF2, BaO, BaF2, YbF3 and ErF3 and place them under sealed conditions, heat them at 1500 °C for 45 minutes to a molten state, and then pour them until they are preheated to 350 °C On the template, after molding, it was kept at a temperature lower than the glass transition temperature of 30 °C for 4 h, and finally annealed to room temperature at a speed of 8 °C / min, and the glass containing rare earth ions was obtained after separation on the template; among them, A y o x 、ZF x , R y o x and Ln y D. x The molar percentages are: 50mol%, 10mol%, 30mol%, 10mol%.

[0024] (2) heat-treat the glass containing rare earth ions at 30°C below the crystallization temperature for 4 h, and cool naturally to room temperature to obtain transparent glass-ceramic containing rare earth ions;

[0025](3) Coa...

Embodiment 2

[0028] Example 2: The preparation method of the enhanced frequency conversion luminescent material of this embodiment is:

[0029] (1) Mix the powders of TeO2, GeO2, K2CO3, PbO, PbF2, CdF2 and TmF3 thoroughly and place them under sealed conditions, heat them at 900 °C for 20 min to a molten state, and then pour them until they are preheated to 200 ℃ on the template, after molding, it is kept at a temperature of 20 ℃ lower than the glass transition temperature for 3 hours, and finally annealed to room temperature at a speed of 5 ℃ / min, and the glass containing rare earth ions is obtained by separating from the template; among them, A y o x 、ZF x , R y o x and Ln y D. x The molar percentages are: 30 mol%, 45 mol%, 23 mol%, 2 mol%.

[0030] (2) heat-treat the glass containing rare earth ions at 40°C below the crystallization temperature for 20 h, and cool naturally to room temperature to obtain transparent glass-ceramic containing rare earth ions;

[0031] (3) Coat the sur...

Embodiment 3

[0034] Example 3 The preparation method of the enhanced frequency conversion luminescent material in this embodiment is as follows:

[0035] (1) The powders of SiO2, Al2O3, NaF, Gd2O3, GdF3, TbF3 and Tb2O3 are fully mixed and placed under sealed conditions, heated at 1350 °C for 50 min to a molten state, and then poured until preheated to 280 ℃ on the template, after molding, it is kept at a temperature lower than the glass transition temperature of 35 ℃ for 5 hours, and finally annealed to room temperature at a speed of 10 ℃ / min, and the glass containing rare earth ions is obtained by separating from the template; among them, A y o x 、ZF x , R y o x and Ln y D. x The molar percentages are: 65 mol%, 30 mol%, 2 mol%, 3 mol%.

[0036] (2) heat-treat the glass containing rare earth ions at 20°C below the crystallization temperature for 2 h, and cool naturally to room temperature to obtain transparent glass-ceramic containing rare earth ions;

[0037] (3) Coat the surface o...

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Abstract

The invention relates to preparation method of an enhanced frequency conversion luminescent material and belongs to the technical field of the frequency conversion luminescent material. The preparation method comprises the following steps: pretreating rare-earth ion-containing transparent glass-ceramics prepared by fully mixing the powder of AyOx, ZFx, RyOx and LnyDx, subsequently coating conductive elargol or preparing metal coatings on the surfaces of the rare-earth ion-containing transparent glass-ceramics; then with one or two surfaces of the rare-earth ion-containing transparent glass-ceramics as anodes simultaneously, performing electric field assisted heat diffusion for 10 minutes to 5 hours at the temperature of 200-400 DEG C and under the pressure of 300V-800V; and finally performing heat treatment for 0.5-48 hours at the temperature of 50-250 DEG C below the glass transition temperature to precipitate noble metal nanometer particles out of the glass-ceramics so as to obtain the enhanced frequency conversion luminescent material. The method can be used for preventing a mutual interference effect during a precipitation process of two crystal materials so as to prepare a luminescent material with good transparency.

Description

technical field [0001] The invention relates to a preparation method of an enhanced frequency conversion luminescent material, in particular to a preparation method of a rare earth-doped glass frequency conversion luminescent material enhanced by noble metal nanoparticles and fluoride microcrystals, and belongs to the technical field of frequency conversion luminescent materials . Background technique [0002] Rare earth-doped frequency conversion luminescence technology has great potential application value in the fields of solid-state laser, data storage, general lighting, three-dimensional display, microscopic imaging, sensing technology, solar cells, anti-counterfeiting technology and military confrontation. Glass has the following advantages as a matrix material: the concentration of rare earths in the glass is high, the energy level splitting of rare earth ions and the phenomenon of fluorescence emission are non-uniform broadening; the matrix composition adjustment and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/86C09K11/88C09K11/72C03C10/00C03C17/06
Inventor 胡曰博邱建备
Owner KUNMING UNIV OF SCI & TECH