Rare earth ion doped CaBr2 glass ceramic and preparation method thereof

A technology of glass-ceramic and rare-earth ions, which is applied in the field of rare-earth ion-doped CaBr2 glass-ceramic and its preparation, can solve the problems of poor chemical stability and mechanical strength, low phonon energy, easy moisture absorption of crystals, etc. Good performance, low phonon energy, high transmittance of blue-violet light

Inactive Publication Date: 2016-02-10
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CaBr 2 Crystals have lower phonon energy than fluoride, and are more suitable as rare earth-doped upconversion luminescent hosts, rare earth ion-doped CaBr 2 crystals have higher upconversion efficiency than fluoride crystals doped with rare earth ions, but CaBr 2 Crystals are easy to absorb moisture, require special handling and storage, are difficult to prepare, and have poor chemical stability and mechanical strength, which affect their practical applications.
But there is no trivalent rare earth ion Yb 3+ 、Er 3+ 、Tm 3+ and Ho 3+ Doped CaBr 2 Published reports on the use of glass-ceramics in upconversion luminescent materials

Method used

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  • Rare earth ion doped CaBr2 glass ceramic and preparation method thereof
  • Rare earth ion doped CaBr2 glass ceramic and preparation method thereof
  • Rare earth ion doped CaBr2 glass ceramic and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] T m 3+ , Yb 3+ doped CaBr 2 The molar percentage composition of glass ceramics is: SiO 2 80mol%, CaBr 2 16mol%, TmBr 3 0.5mol%, YbBr 3 3.5mol%, the process for preparing glass-ceramics of the above composition is as follows:

[0021] (1) Weigh calcium acetate, ytterbium acetate, and thulium acetate, and the parts are respectively composed of CaBr in the above mole percentage 2 , YbBr 3 , TmBr 3 Weigh the mole percentage content of the above-mentioned acetate, dissolve the above-mentioned acetate in deionized water to form an acetate solution, add tribromoacetic acid to the acetate solution to obtain a transparent mixed solution, wherein tribromoacetic acid and acetate solution The molar ratio of the sum of metal ions is 3:1;

[0022] (2) SiO in the same molar percentage composition as step (1) 2 The molar percentage content takes ethyl orthosilicate and dissolves it in ethanol to obtain ethyl orthosilicate solution, then mixes the mixed solution prepared in st...

Embodiment 2

[0027] Er3+ , Yb 3+ doped CaBr 2 The molar percentage composition of glass ceramics is: SiO 2 80mol%, CaBr 2 15mol%, ErBr 3 0.5mol%, YbBr 3 4.5mol%, after the preparation and heat treatment process identical with embodiment 1, obtain transparent rare earth ion Er 3+ , Yb 3+ Doped CaBr 2 Glass-ceramic. The glass-ceramic was measured with a TRIAX550 fluorescence spectrometer, under the excitation condition of a 970nm laser, strong green and red upconversion luminescence were observed.

Embodiment 3

[0029] Er 3+ 、Tm 3+ , Yb 3+ doped CaBr 2 The molar percentage composition of glass ceramics is: SiO 2 82mol%, CaBr 2 14mol%, ErBr 3 0.3mol%, TmBr 3 0.3mol%, YbBr 3 3.4mol%, after the preparation and heat treatment process identical with embodiment 1, obtain transparent rare earth ion Er 3+ 、Tm 3+ , Yb 3+ Doped CaBr 2 Glass-ceramic. The glass-ceramic was measured with a TRIAX550 fluorescence spectrometer, under the excitation condition of a 970nm laser, strong blue, green and red upconversion luminescence were observed.

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Abstract

The invention discloses a rare earth ion doped CaBr2 glass ceramic comprising the following components in percentage by mole: 80-95mol% of SiO2, 4.7-16mol% of CaBr2 and 0.3-5mol% of LnBr3, wherein LnBr3 is at least one selected from YbBr3, ErBr3, TmBr3 and HoBr3. The rare earth ion doped CaBr2 glass ceramic has the advantages of good transparency, deliquescence resistance and mechanical property and relatively high hyacinthine transmittance, has the performances of low phonon energy, high up-conversion efficiency and the like and is capable of greatly increasing the efficiency of an up-conversion laser; and the glass ceramic is simple in preparation method of and relatively low in production cost.

Description

technical field [0001] The present invention relates to a rare earth ion doped glass ceramics, in particular to a rare earth ion doped CaBr used as an up-conversion luminescent material 2 Glass-ceramic and its preparation method. Background technique [0002] The up-conversion luminescence of rare earth ions refers to the phenomenon that when a sample doped with rare earth ions is irradiated with excitation light with a longer wavelength, light with a wavelength shorter than that of the excitation light is emitted. Utilizing the up-conversion properties of rare earth ions, an inexpensive fiber laser that can work at room temperature and continuously output violet-blue-green light can be obtained. Up-conversion lasers can be used in various fields such as color displays, data storage, information technology, laser printing, and medical treatment. To improve the efficiency of upconversion luminescence, it is necessary to reduce the phonon energy of the host material, mainly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16C03C4/12
Inventor 张志雄张约品欧阳绍业张为欢王倩
Owner NINGBO UNIV
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