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Rare-earth doped oxyfluoride tellurate scintillation glass and preparation method thereof

A fluorooxytellurate and scintillation glass technology, applied in the field of scintillation glass, can solve the problems of affecting the scintillation luminescence output performance, poor short-wavelength transmittance, high refractive index, etc., achieving good short-wavelength transmittance and avoiding self-absorption , the effect of high density

Inactive Publication Date: 2012-05-30
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
[0003] Oxyfluorine tellurate glass has good thermal and chemical stability, high refractive index, wide band, especially high transmittance of blue-violet light, etc., and is currently mainly used as infrared and up-conversion luminescent materials; No published reports of use in scintillating glass

Method used

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  • Rare-earth doped oxyfluoride tellurate scintillation glass and preparation method thereof
  • Rare-earth doped oxyfluoride tellurate scintillation glass and preparation method thereof
  • Rare-earth doped oxyfluoride tellurate scintillation glass and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Preparation of rare earth doped oxyfluoride tellurate scintillation glass: according to raw material composition: TeO 2 : 65mol%, PbF 2 : 15mol%, BaF 2 : 7mol%, Gd 2 o 3 : 6mol%, Tb 2 o 3 : 7mol%, take the analytically pure raw materials, mix all raw materials evenly; then pour into a platinum crucible to melt into a melt, the melting temperature is 800-950 ° C, and keep warm for 0.5-2 hours after melting; pour the melt into After preheating the cast iron mold at 200-300°C, cool naturally to form glass; place the glass in a muffle furnace for annealing. Cool down to 45-55°C at a rate of one hour, then turn off the power supply of the muffle furnace and automatically cool down to room temperature to obtain the first product of scintillation glass, which is processed into 15×15×7mm after cutting, surface grinding and polishing, and becomes the scintillation glass of the present invention . Excite the scintillation glass with X-rays, measure the emitted light, and o...

Embodiment 2

[0028] Substantially the same as Example 1, the only difference is that the raw material component is: TeO 2 : 74mol%, PbF 2 : 14mol%, BaF 2 : 10mol%, Gd 2 o 3 : 1mol%, 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

[0030] Substantially the same as Example 1, the only difference is that the raw material component is: TeO 2 : 85mol%, PbF 2 : 7mol%, BaF 2 : 3mol%, Gd 2 o 3 : 3mol%, Tb 2 o 3 : 1mol%, 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 respectively 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 483nm, 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 tellurate scintillation glass and a preparation method thereof. Raw materials TeO2, PbF2, BaF2 and Gd2O3 of the scintillation glass are high-density compounds, so the obtained oxyfluoride tellurate glass has high density, and the density can reach over 6g / cm<3>. Compared with the traditional scintillation glass containing the raw materials PbO,Bi2O3 and the like according to the raw material formula, the scintillation glass of the invention has high short wavelength blue-violet light transmittance and avoids self absorption of the glass; wide wave band also can transmit visible light; the Gd2O3 raw material contained in the scintillation glass can sensitize the luminescence of rare-earth ions such as Tb3+, Ce3+ and the like and greatlyimproves the output of scintillation light; therefore, the scintillation glass has the advantages of high density, strong scintillation light emission and output, wide wave band and good short wavelength transmission performance. The preparation method for the scintillation glass is simple and has low production cost.

Description

technical field [0001] The invention relates to scintillation glass, in particular to rare earth-doped oxyfluorine tellurate scintillation glass and a preparation method thereof. Background technique [0002] 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 scintillation materials used, the cost is an important factor that must be considered when selecting scintillation materials. It has an attractive application prospect in security inspection and so on. The current scintillation glass has silicate glass, germanate glass and phosphate glass as sub...

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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