Rare earth doped porous oxyfluoride silicate glass ceramic and preparation method thereof

A silicate glass and rare earth doping technology, which is applied in the field of photoluminescence, can solve the problems of up-conversion luminescence characteristics that have not been reported, and achieve the effect of low production cost and simple preparation method

Inactive Publication Date: 2015-12-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the study on the upconversion luminescence properties of rare earth ions doped in porous oxofluoride glass ceramics has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Embodiment 1: by composition 30SiO 2 ·30Al 2 o 3 ·10BaF 2 26Na 2 O·3YbF 3 0.8Tb 2 o 3 0.2Ho 2 o 3 (mol%) Weigh the SiO required for a total mass of 10 grams 2 、Al 2 o 3 、BaF 2 、Na 2 O, YbF 3 , Tb 2 o 3 and Ho 2 o 3 The powder raw materials are mixed thoroughly and put into a crucible with a cover and melted at 1600°C for 35 minutes, and then the molten glass is quickly cast on a stainless steel template that has been preheated to 400°C. ℃ for 4 hours, and naturally cooled to room temperature to obtain porous glass containing rare earth ions, and the prepared porous glass was cut, ground and polished; the prepared porous glass was lower than the glass crystallization temperature Heat treatment at 50°C for 2 hours, and naturally cool to room temperature to obtain rare earth-doped glass ceramics with white precipitates at the positions of pores. Directly irradiating the white precipitates with a 980nm laser can obtain bright green upconversion luminescenc...

Embodiment 2

[0014] Embodiment 2: by composition 55SiO 2 5Al 2 o 3 25BaF 2 13Na 2 O·1YbF 3 0.4Tb 2 o 3 0.6Ho 2 o 3 (mol%) Weigh the SiO required for a total mass of 10 grams 2 、Al 2 o 3 、BaF 2 、Na 2 O, YbF 3 , Tb 2 o 3 and Ho 2 o 3 The powder raw materials are mixed thoroughly and put into a crucible with a cover and melted at 1500°C for 50 minutes, and then the molten glass is quickly cast on a stainless steel template that has been preheated to 350°C. ℃ for 8 hours, and naturally cooled to room temperature to obtain porous glass containing rare earth ions, and the prepared porous glass was cut, ground and polished; Heat treatment at 100°C for 1.5h, and cool naturally to room temperature to obtain overall transparent rare earth-doped porous glass-ceramic with green upconversion luminescence by irradiating with a 980nm laser at the position of the pores.

Embodiment 3

[0015] Embodiment 3: by composition 36SiO 2 15Al 2 o 3 15BaF 2 30Na 2 O·3Yb 2 o 3 0.8TbF 3 0.2HoF 3 (mol%) Weigh the SiO required for a total mass of 10 grams 2 、Al 2 o 3 、BaF 2 、Na 2 O, YbF 3 , Tb 2 o 3 and Ho 2 o 3 The powder raw materials are mixed thoroughly and put into a crucible with a cover and melted at 1400°C for 90 minutes, and then the molten glass is quickly cast on a stainless steel template that has been preheated to 300°C. ℃ for 5 hours, and naturally cooled to room temperature to obtain porous glass containing rare earth ions, and the prepared porous glass was cut, ground and polished; Heat treatment at 80°C for 3 hours, and naturally cool to room temperature to obtain rare earth-doped glass ceramics with white precipitates at the positions of the pores. Directly irradiating the white precipitates with a 980nm laser can obtain bright green upconversion luminescence.

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Abstract

The invention relates to rare earth doped porous oxyfluoride silicate glass ceramic and a preparation method thereof and belongs to the technical field of photoluminescence. A rare earth doped glass frequency conversion luminescent material is prepared from raw materials in mole percentage as follows: 30%-55% of SiO2, 5%-30% of Al2O3, 10%-30% of BaF2, 10%-30% of Na2O, 0%-3% of YbF3, 0%-3% of Yb2O3, 0%-0.8% of Tb2O3, 0%-0.8% of TbF3, 0%-0.6% of Ho2O3 and 0%-0.6% of HoF3. According to the preparation method, porous oxyfluoride silicate glass is prepared firstly with a melt quenching method, porous matrix glass is subjected to thermal treatment, and the porous oxyfluoride silicate glass ceramic is obtained. The prepared rare earth doped porous oxyfluoride silicate glass ceramic has the characteristics of local microcrystalization or crystallization to change the photoluminescence color of a microcrystalization or crystallization area, that is, dark red of the matrix glass is turned to bright green after crystallization for up-conversion luminescence; the preparation method for preparing the rare earth doped porous oxyfluoride silicate glass ceramic is simple, and the production cost is lower.

Description

technical field [0001] The invention relates to a rare earth-doped porous oxyfluorosilicate glass ceramic and a preparation method thereof, belonging to the technical field of photoluminescence. 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. Therefore, domestic and foreign Rare earth doped luminescent materials have been extensively studied. [0003] The research results have confirmed that after heat treatment of rare earth-doped matrix glass, after the crystal phase appears inside the glass, rare earth ions will be preferentially enriched in the precipitated crystal phase, which can greatly improve the frequency conversion luminous efficiency of rare earth ions. In addition, oxyfluoride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 胡曰博任鹏邱建备
Owner KUNMING UNIV OF SCI & TECH
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