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Rare earth doped oxyfluoride tellurite scintillation glass and preparation method thereof

A technology of oxyfluorine tellurite and scintillation glass, which is applied in the field of scintillation glass, can solve problems such as high refractive index, achieve high density, low production cost, and good short-wavelength transmission performance

Inactive Publication Date: 2014-04-23
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The publication number is CN101318773, and the invention patent application titled "a kind of Pr3+ doped high-density scintillation glass and its preparation method" also discloses that bismuth borosilicate is used as a glass substrate, and Pr3+ sup>3+ is the scintillation glass of scintillation glass material, which has high density, strong 488nm blue light emission, and emits 530nm green light, 610nm orange light and 647nm red light; but short wavelength transmittance Poor, affecting output performance of flickering light
[0004]Oxyfluorine tellurate glass has good thermal and chemical stability, high refractive index, wide band, especially blue-violet light transmission It has the advantages of high efficiency and is currently mainly used as infrared and up-conversion luminescent materials; there is no public report on scintillation glass

Method used

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  • Rare earth doped oxyfluoride tellurite scintillation glass and preparation method thereof
  • Rare earth doped oxyfluoride tellurite scintillation glass and preparation method thereof
  • Rare earth doped oxyfluoride tellurite scintillation glass and preparation method thereof

Examples

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Effect test

Embodiment 1

[0027] Preparation of rare earth doped oxyfluoride tellurate scintillation glass: according to raw material composition: TeO 2 : 65 mol%, PbF 2 : 15 mol%, BaF 2 : 7 mol%, Gd 2 o 3 : 6 mol%, Tb 2 o 3 : 7 mol%, weigh each raw material of analytical purity, mix all the raw materials evenly; then pour into a platinum crucible to melt into a melt, the melting temperature is 800-950°C, keep it warm for 0.5-2 hours after melting; pour the melt into Put it into a cast iron mold preheated at 200-300°C, and cool naturally to form glass; place the glass in a muffle furnace for annealing, annealing conditions: first heat the glass at 325-375°C for 1 hour, then heat Cool down to 45-55°C at a rate of 1 hour, then turn off the power supply of the muffle furnace and automatically cool down to room temperature to obtain the first product of scintillating glass, which is processed into 15×15×7mm after cutting, surface grinding and polishing, and becomes the scintillating glass of the pr...

Embodiment 2

[0029] Substantially the same as Example 1, the only difference is that the raw material component is: TeO 2 : 74 mol%, PbF 2 : 14 mol%, BaF 2 : 10 mol%, Gd 2 o 3 : 1 mol%, Eu 2 o 3 : 1 mol%. Excite the scintillation glass with X-rays, measure the emitted light, and obtain image 3 The emission spectra shown are from image 3 It can be seen that there are two emission peaks at 590nm and 618nm, corresponding to Eu 3+ Ionic 5 D. 0 → 7 f 1 , 5 D. 0 → 7 f 2 transition. 5 D. 0 → 7 f 2 The intensity of the 618nm wavelength scintillation peak produced by the transition is relatively large, and there is a large scintillation light output; at the same time, Gd 3+ ions can effectively sensitize Eu 3+ The luminescence of the ions enhances the Eu 3+ The flickering glow of ions.

Embodiment 3

[0031] Substantially the same as Example 1, the only difference is that the raw material component is: TeO 2 : 85mol%, PbF 2 : 7 mol%, BaF 2 : 3 mol%, Gd 2 o 3 : 3 mol%, Tb 2 o 3 : 1 mol%, Dy 2 o 3 : 1 mol%. Excite the scintillation glass with X-rays, measure the emitted light, and obtain Figure 4 The emission spectra shown are from Figure 4 It can be seen that there are 6 emission peaks in total, and the emission peaks at 413nm and 435nm correspond to Tb 3+ of 5 D. 3 → 7 f J (J = 5, 4) energy level transitions, 487nm, 542nm, 581nm and 620nm correspond to Tb 3+ Ionic 5 D. 4 → 7 f J (J = 6, 5, 4, 3) transitions. There is no Dy in the picture 3+ ion 4 F 9 / 2 → 6 H 15 / 2 and 4 F 9 / 2 → 6 H 13 / 2 The transition corresponding to the 483 nm, 575nm emission peaks, which is due to the Dy 3+ Energy is effectively transferred to Tb through resonance transfer 3+ , so Dy 3+ Make Tb 3+ The luminous intensity is increased.

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Abstract

The invention discloses rare earth doped oxyfluoride tellurite scintillation glass and a preparation method thereof. The scintillation glass and the preparation method have the following advantages: the raw materials of the scintillation glass, such as TeO2, PbF2, BaF2 and Gd2O3, are all high-density compounds, so the obtained oxyfluoride tellurite glass has density higher than 6g / cm<3>; compared with the traditional scintillation glass containing such raw materials as PbO and Bi2O3, the scintillation glass containing the above raw materials has higher short wavelength blue and violet light transmittance, so self-absorption of the scintillation glass is avoided and visible light can transmit the glass even the wave band is wider; and the scintillation glass contains Gd2O3, and luminescence of sensitized Tb3<+>, Ce3<+> and other rare earth ions greatly improves flare light output. Therefore, the scintillation glass has the advantages of high density, strong flare light luminescence output, wider wave band and good short wavelength transmittance; and the preparation method of the scintillation glass is simple and is lower in production cost.

Description

[0001] This application is a divisional application of the original application number 201010246270.2 for a patent application for invention. Its filing date is August 3, 2010. The title of the invention is "rare earth-doped oxyfluoride tellurate scintillation glass and its preparation method". technical field [0002] The invention relates to scintillation glass, in particular to rare earth-doped oxyfluorine tellurate scintillation glass and a preparation method thereof. Background technique [0003] Compared with scintillation crystals, scintillation glass has the advantages of simple preparation process, low cost and large product size. Scintillation glass also has the advantages of a wide adjustable range of composition, more types of activators that can be mixed, higher doping concentrations and uniform distribution, thus ensuring the uniform scintillation performance of glass materials. In large-scale high-energy physics experimental devices, due to the huge amount of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/23C03C4/12
Inventor 张约品何伟王实现王金浩章践立夏海平胡涛王贻芳
Owner NINGBO UNIV
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