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Rare earth-doped halide glass ceramics and preparation method thereof

A glass-ceramic and rare earth doping technology, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problem of low luminous intensity of fluorescent glass, avoid aging and discoloration, increase the possibility of practical use, and enhance Effect of fluorescence output

Inactive Publication Date: 2019-07-23
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method is achieved by co-doping rare earth ions Pr in fluoride glass 3+ and Ho 3+ , under the excitation of 445nm blue light, white light with adjustable color temperature can be obtained, but the fluorescent glass has problems such as low luminous intensity

Method used

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  • Rare earth-doped halide glass ceramics and preparation method thereof
  • Rare earth-doped halide glass ceramics and preparation method thereof
  • Rare earth-doped halide glass ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～8

[0029] The raw material composition of Example 1-8# fluorozirconate glass ceramics is shown in Table 1:

[0030] Weighing:

[0031]

[0032] The preparation process of the fluorozirconate matrix glass: the weighed raw materials are mixed and ground to obtain the mixture. The mixture is placed in a covered platinum crucible, melted and clarified in a high-temperature electric furnace above 910℃, and the molten glass is poured in On the preheated stainless steel mold, the glass block was transferred to an annealing furnace at 330°C for annealing, kept for 6 hours, and then reduced to 100°C at a rate of 10°C / h. The furnace was cooled to room temperature, and the glass sample was taken out after complete cooling. Pr 3+ / Ho 3+ Co-doped fluorozirconate matrix glass. The XRD pattern of fluorozirconate matrix glass is as follows figure 1 As shown, the sample has two typical scattering peak packets near 25° and 47°, and no devitrification peak appears. The ultraviolet fluorescence spectru...

Embodiment 1

[0034] Heat treatment process: the annealed fluorozirconate matrix glass is placed in a muffle furnace for microcrystalline heat treatment, first heat up to 355°C at a rate of 5°C / min, and then heat up to 395°C at a rate of 2°C / min for 1 hour Treated for 0.25h, and finally cooled to room temperature with the furnace to obtain transparent fluorozirconate glass-ceramics. The XRD pattern of Example 1# of the present invention is as follows figure 1 As shown, there are crystal diffraction peaks, and the analysis is BaZrF 6 Crystal. Example 1# Fluorescence spectra under 445nm blue excitation are as follows figure 2 As shown, the fluorescence intensity of Example 1# is stronger than its fluorozirconate matrix glass. Example 1# Fluorescence spectra under X-ray excitation are as follows Figure 4 As shown in (a), the fluorescence intensity of Example 1# is stronger than that of its fluorozirconate matrix glass.

Embodiment 2

[0036] Heat treatment process: the annealed fluorozirconate matrix glass is placed in a muffle furnace for microcrystalline heat treatment, first heating up to 355°C at a rate of 5°C / min, and then heating up to 395°C at a rate of 2°C / min for 1 hour Treated for 0.75h, and finally cooled to room temperature with the furnace to obtain transparent glass-ceramics. The fluorescence spectrum of Example 2# of the present invention under the excitation of 445nm blue light is as follows figure 2 As shown, the fluorescence intensity of Example 2# is about 3 times that of fluorozirconate matrix glass. The fluorescence spectrum of Example 2# of the present invention under X-ray excitation is as follows Figure 4 As shown in (a), the fluorescence intensity of Example 2# is about 2.6 times that of the fluorozirconate matrix glass.

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Abstract

The invention relates to rare earth-doped halide glass ceramics and a preparation method thereof. The glass ceramics are prepared through microcrystallization heat treatment, and the composition of the glass ceramics is: (100-x)(ZrF4-BaF2-YF3-AlF3)-xBaCl2:Re<3+>, wherein the value range of x is 0-33; Re<3+> is codoping of Pr<3+> and Ho<3+>, and the concentration proportional range of the Pr<3+> tothe Ho<3+> is 0.25-3. The glass ceramics involved in the invention have the characteristics of high fluorescence intensity and low cost, enhance the fluorescence intensity of the rare earth ions Pr<3+> and Ho<3+> under excitation of 445 nm blue light and X rays, and can be applied to the fields of white light emitting diode, scintillating materials and the like.

Description

Technical field [0001] The invention relates to rare-earth-doped halide glass-ceramics, in particular to a rare-earth-doped halide glass-ceramics which can be used in the fields of white light emitting diodes and scintillation materials and a preparation method thereof. [0002] technical background [0003] White Light Emitting Diode (WLED) is a new type of solid-state light-emitting source, which has the advantages of high light efficiency, adjustable color temperature, environmental protection and long life. It gradually replaces traditional lighting fixtures in applications such as visual display, lighting and message transmission. At present, there are two main ways to realize WLED: one is to mix and synthesize white light by multiple three-color LEDs; the other is to synthesize white light by a single LED light-emitting diode and the corresponding phosphor. At present, the most widely used blue InGaN chip with YAG:Ce 3+ Yellow phosphor, the white light obtained by this metho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16C03C4/12C03B19/02C03B32/02
CPCC03B19/02C03B32/02C03C4/12C03C10/16
Inventor 邹雅陈丹平张宗辉杜英
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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