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A rare earth ion-doped high-density oxyfluoroborate germanate scintillation glass and its preparation method

A fluorooxoborogermanate and scintillation glass technology, applied in the field of luminescent materials, can solve problems such as pollution of the environment, restrictions, etc., and achieve the effects of simple preparation process, reduced preparation cost, and good chemical stability

Active Publication Date: 2018-05-08
JINGGANGSHAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invented scintillation glass density is higher than 6.0g / cm 3 , but the glass component contains a large amount of PbO and PbF 2 , seriously pollute the environment, so its practical application may be severely restricted

Method used

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  • A rare earth ion-doped high-density oxyfluoroborate germanate scintillation glass and its preparation method
  • A rare earth ion-doped high-density oxyfluoroborate germanate scintillation glass and its preparation method
  • A rare earth ion-doped high-density oxyfluoroborate germanate scintillation glass and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0034] 1. Preparation process

[0035] The first step: the glass formula is B 2 o 3 -GeO 2 -Gd 2 o 3 -GdF 3 -LaF 2 , the specific glass composition of Example 1 is given in Table 1, and the glass luminescent center is Ce 3+ ;

[0036] Step 2: Mix the formula thoroughly and melt it in the air atmosphere at 1430°C for 3 hours by high-temperature melting method;

[0037] Step 3: Pour the above melt into a preheated 600°C stainless steel mold for casting;

[0038] Step 4: Place the above glass in a muffle furnace at 520°C for 10 hours for annealing;

[0039] Step 5: The above-mentioned primary scintillating glass is processed into 15×15×2mm after cutting, surface grinding and polishing 3 The scintillation glass of the present invention.

[0040] 2. Test

[0041] The photoluminescence spectra and X-ray excitation emission spectra of all scintillation glasses were obtained by using a fluorescence spectrometer (Hitachi F-7000, Ex slit 5.0nm, Em slit 5.0nm) and an X-ray ex...

Embodiment 1-5

[0044] Table 1. Glass composition of Examples 1-5

[0045]

Embodiment 2

[0047] The glass component of embodiment 2 is B 2 o 3 -GeO 2 -Lu 2 o 3 -GdF 3 -BaF 2 , the specific glass composition of Example 2 is given in Table 1, and the luminescent center is Tb 3+ Ions, the melting temperature is 1520°C, the melting atmosphere is air, the annealing temperature is 650°C, and the annealing time is 15 hours.

[0048] image 3 It is the photoluminescence and X-ray excitation emission spectrum of the scintillation glass of embodiment 2. From image 3 It can be seen from (a) that the four emission peaks at 490nm, 545nm, 588nm and 624nm in the emission spectrum correspond to Tb 3+ ion 5 D. 4 → 7 f J (J = 6, 5, 4, 3) optical transition, where 545nm ( 5 D. 4 → 7 f 5 ) wavelength has the maximum luminous intensity. And under X-ray (80kV and 4mA) excitation, obtain the scintillation light output of embodiment 2 scintillation glass, as image 3 (b) shown.

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Abstract

The invention relates to a rear-earth ion doped high-density boron oxyfluoride germanate scintillation glass and a preparation method thereof. The scintillation glass is prepared from following components in percentage by weight: 5-20wt% of B2O3, 5-20wt% of GeO2, 0-20wt% of Y2O3, 0-25wt% of La2O3, 0-70wt% of Gd2O3, 0-70wt% of Lu2O3, 0-10wt% of LaF3, 0-45wt% of GdF3, 2-20wt% of BaF2, and the balance of rear earth ions. The emission wavelength and decay time of the high-density scintillation glass can be regulated by doping and (or) co-doping different rear-earth ions. The rear-earth ion doped high-density boron oxyfluoride germanate scintillation glass is rich in rear-earth oxides, rear-earth fluorides and non-rear-earth heavy metal fluorides, so that on one hand, the density (as high as 6.75g / cm<3>) of the scintillation glass can be greatly improved and the cost can be lowered by virtue of the doped non-rear-earth fluoride (such as BaF2), on the other sand, due to the inherent transparency of the glass, the preparation process is simple and the components are easy to regulate, and the characteristics of low cost, a great size, and the like can be realized, and therefore, the rear-earth ion doped high-density boron oxyfluoride germanate scintillation glass has important application value in the ray detecting field.

Description

technical field [0001] The invention belongs to the field of luminescent materials, and relates to a scintillation glass material and a preparation method thereof, in particular to rare earth ion-doped high-density oxyfluoroborate germanate scintillation glass, a preparation method and application thereof. Background technique [0002] Scintillation materials are photofunctional materials that emit visible light after absorbing high-energy rays. In recent years, they have been widely used in high-energy physics, nuclear physics, astrophysics, geophysics, industrial flaw detection, medical imaging, and safety testing. [0003] Scintillation crystals are currently the most studied and widely used scintillators, such as Bi 4 Ge 3 o 12 (BGO), CeF 3 , PbWO 4 (PWO) etc. However, scintillation crystals have disadvantages such as complex preparation process, long growth cycle, high cost, and difficulty in growing large-sized single crystals. In particular, traditional crystal g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C4/12C03C3/253
CPCC03C3/253C03C4/12
Inventor 孙心瑗赵景泰张志军杨昕昕余丽丽余晓光蒋达国李宇农
Owner JINGGANGSHAN UNIVERSITY
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