CN103951232B - Rare earth ion doped Sr 2laCl 7devitrified glass and preparation method thereof - Google Patents

Rare earth ion doped Sr 2laCl 7devitrified glass and preparation method thereof Download PDF

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Publication number
CN103951232B
CN103951232B CN201410198257.2A CN201410198257A CN103951232B CN 103951232 B CN103951232 B CN 103951232B CN 201410198257 A CN201410198257 A CN 201410198257A CN 103951232 B CN103951232 B CN 103951232B
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lacl
glass
devitrified glass
rare earth
earth ion
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CN103951232A (en
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欧阳绍业
张约品
夏海平
张为欢
王倩
杨斌
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Ningbo University
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Ningbo University
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Abstract

The invention discloses a kind of rare earth ion doped Sr 2laCl 7devitrified glass and preparation method thereof, its Mole percent consists of SiO 2: 30-40mo1%, B 2o 3: 30-40mo1%, Sr 2laCl 7: 20-29mo1%, LnCl 3: 1-10mo1%, wherein LnCl 3for CeCl 3, EuCl 3, TbCl 3in one, its preparation method first prepares SiO with scorification 2-B 2o 3-Sr 2laCl 7-LnCl 3be glass, after heat treatment obtain transparent Sr 2laCl 7devitrified glass, Sr of the present invention 2laCl 7devitrified glass, energy Deliquescence-resistant, good mechanical property, short wavelength's royal purple light transmission rate are higher, have stronger light output, decay soon, the performances such as good energy resolution and temporal resolution.The preparation method of this devitrified glass is simple, and production cost is lower.

Description

Rare earth ion doped Sr 2laCl 7devitrified glass and preparation method thereof
Technical field
The present invention relates to a kind of rare earth ion doped devitrified glass, especially relate to a kind of rare earth ion doped Sr being used as scintillation material 2laCl 7devitrified glass and preparation method thereof.
Background technology
Scintillation material is a kind of lower optical function material that can send visible ray of exciting at energetic ray (as x-ray, gamma-rays) or other radioactive particle, is widely used in the fields such as the researchs of nuclear medicine diagnostic, high energy physics and nuclear physics experiment, industrial and geological prospecting.The requirement of difference to scintillator according to Application Areas is also not quite similar, but generally scintillation material should possess following properties: the features such as luminous efficiency is high, fluorescence decay is fast, density is comparatively large, cost is low and radiation resistance is good.Scintillation crystal generally has the advantage such as resistance to irradiation, fast decay, High Light Output, but scintillation crystal also exists following serious shortcoming: preparation difficulty, expensive.And although rare earth ion doped scintillation glass cost is low, easily prepare large-size glass, it is difficult compared with crystal in light output, multiplicity etc., and therefore its application is also very limited.
Sr 2laCl 7crystal be a kind of can the scintillation crystal matrix of doping with rare-earth ions, Ce 3+the Sr of doping 2laCl 7it is high that crystal has light output, decays soon, good energy resolution, temporal resolution and linear response, has than rare earth ion doped crystal of fluoride and the higher luminous efficiency of oxide crystal, scintillation detectors efficiency can be made greatly to improve.Eu flutter, Tb 3+doping Sr 2laCl 7the scintillation properties of crystal is also more excellent, can be used for the field such as safety check, blinking screen.But Sr 2laCl 7crystal is deliquescence very easily, and mechanical property is poor, easy cleavage slabbing, large-size crystals growth difficulty, and expensively have impact on its practical application.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Deliquescence-resistant, good mechanical property, has stronger light output, fast decay, energy resolution and the good rare earth ion doped Sr of temporal resolution 2laCl 7devitrified glass.Present invention also offers the preparation method of this flicker devitrified glass, it is simple that this preparation method has method, the advantage that cost is low.
The present invention solves the problems of the technologies described above adopted technical scheme: rare earth ion doped Sr 2laCl 7devitrified glass, its Mole percent consists of:
SiO 2：30-40mo1％B 2O 3：30-40mo1％
Sr 2LaCl 7：20-29mo1％LnCl 3：1-10mo1％
Wherein LnCl 3for CeCl 3, EuCl 3, TbCl 3in one.
This flicker devitrified glass material component is: SiO 2: 30mo1%, B 2o 3: 40mo1%, Sr 2laCl 7: 29mo1%, CeCl 3: 1mo1%.
This flicker devitrified glass material component is SiO 2: 35mo1%, B 2o 3: 35mo1%, Sr 2laCl 7: 20mo1%, EuCl 3: 10mo1%.
This flicker devitrified glass material component is: SiO 2: 40mo1%, B 2o 3: 30mo1%, Sr 2laCl 7: 25mo1%, TbCl 3: 5mo1%.
Described rare earth ion doped Sr 2laCl 7the preparation method of devitrified glass, comprises the steps:
(1) SiO 2-B 2o 3-Sr 2laCl 7-LnCl 3be founding of glass:
Take analytically pure each raw material by material component, add the NH accounting for raw material gross weight 5% 4hCl 2raw material is mixed, then pours in quartz crucible or corundum crucible and melt, temperature of fusion 1300-1480 DEG C, insulation 1-2 hour, glass melt is poured in pig mold, be then placed in retort furnace and anneal, in glass transformation temperature Tg temperature after 1 hour, 50 DEG C are cooled to the speed of 10 DEG C/h, close retort furnace power supply and be automatically cooled to room temperature, take out glass, for micritization thermal treatment.
(2) Sr 2laCl 7prepared by devitrified glass:
According to thermal analyses (DTA) experimental data of glass, obtained glass is placed in nitrogen fine annealing stove heat-treated 7 ~ 9 hours near its first crystallization peak, and then be cooled to 50 DEG C with the speed of 5 DEG C/h, close fine annealing stove power supply, automatically be cooled to room temperature, obtain transparent rare earth ion doped Sr 2laCl 7devitrified glass.
Compared with prior art, the invention has the advantages that: this devitrified glass is made up of chlorine oxonium compound, the through performance of short wavelength is good, has Sr 2laCl 7the feature that the superior scintillation properties of crystalline host material and the physical strength of oxide glass, stability and being easy to is processed, overcomes Sr 2laCl 7single crystal is the shortcoming such as deliquescence, poor, the easy cleavage slabbing of mechanical property very easily; The experiment proved that: by formula of the present invention and preparation method, separate out rare earth ion doped to Sr 2laCl 7crystalline phase, obtained rare earth ion doped Sr 2laCl 7devitrified glass is transparent, and energy Deliquescence-resistant, good mechanical property, short wavelength's royal purple light transmission rate are higher, and have stronger light output, decay soon, the performances such as good energy resolution and temporal resolution, can make scintillation detectors efficiency greatly improve.The preparation method of this devitrified glass is simple, and production cost is lower.
Accompanying drawing explanation
Fig. 1 is the transmission electron microscope figure (TEM) of sample after the thermal treatment of embodiment one micritization.
Fig. 2 is the Ce:Sr of embodiment one excitation of X-rays 2laCl 7the fluorescence spectrum of devitrified glass.
Fig. 3 is the Eu:Sr of embodiment two excitation of X-rays 2laCl 7the fluorescence spectrum of devitrified glass.
Fig. 4 is the Tb:Sr of embodiment three excitation of X-rays 2laCl 7the fluorescence spectrum of devitrified glass.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one: table 1 is glass formula and the first recrystallization temperature value of embodiment one.
Table 1
Concrete preparation process is as follows: the first step, weighs 50 grams of analytical pure raw materials by the formula in table 1, adds 2.5 grams of NH 4hCl 2, raw material is mixed after pour in quartz crucible and melt, temperature of fusion 1300 DEG C, be incubated 2 hours, glass melt is poured in pig mold, then be placed in retort furnace to anneal, after 1 hour, be cooled to 50 DEG C with the speed of 10 DEG C/h in glass transformation temperature Tg temperature, close retort furnace power supply and be automatically cooled to room temperature, take out glass; Second step, according to thermal analyses (DTA) experimental data of glass, obtain the first recrystallization temperature 694 DEG C, obtained glass is placed in the close annealing furnace of nitrogen 713 DEG C of thermal treatments 7 hours, and then be cooled to 50 DEG C with the speed of 5 DEG C/h, close fine annealing stove power supply and be automatically cooled to room temperature, obtain transparent Ce 3+the Sr of doping 2laCl 7devitrified glass.
To the Sr of preparation 2laCl 7devitrified glass carries out transmission electron microscope test, obtain the transmission electron microscope picture of glass after micritization process as shown in Figure 1, its result is as follows: in photo, the nano microcrystalline of glass basis and precipitation seems more clearly, and the stain distributed in glass basis is microcrystal grain.The test of X-ray diffraction shows that crystalline phase is Sr 2laCl 7phase, the material therefore obtained is Sr 2laCl 7the devitrified glass of crystallization phase.The Ce of excitation of X-rays 3+ion doping Sr 2laCl 7as shown in Figure 2, fluorescence peak intensity is larger for the fluorescence spectrum of devitrified glass.Mix Ce 3+ion Sr 2laCl 7devitrified glass light output is 20500ph/MeV, and fall time is 65ns.
Embodiment two: table 2 is glass formula and the first recrystallization temperature value of embodiment two.
Table 2
Concrete preparation process is as follows: the first step, weighs 50 grams of analytical pure raw materials by the formula in table 2, adds 2.5 grams of NH 4hCl 2, raw material is mixed after pour in corundum crucible and melt, temperature of fusion 1400 DEG C, be incubated 1 hour, glass melt is poured in pig mold, then be placed in retort furnace to anneal, after 1 hour, be cooled to 50 DEG C with the speed of 10 DEG C/h in glass transformation temperature Tg temperature, close retort furnace power supply and be automatically cooled to room temperature, take out glass; Second step, according to thermal analyses (DTA) experimental data of glass, obtain the first recrystallization temperature 706 DEG C, obtained glass is placed in nitrogen fine annealing stove 724 DEG C of thermal treatments 9 hours, and then be cooled to 50 DEG C with the speed of 5 DEG C/h, close fine annealing stove power supply and be automatically cooled to room temperature, obtain transparent Eu 3+the Sr of ion doping 2laCl 7devitrified glass.
To the Sr of preparation 2laCl 7the spectral quality test of devitrified glass, the Eu of excitation of X-rays 3+ion doping Sr 2laCl 7as shown in Figure 3, its result shows to produce Eu:Sr after Overheating Treatment the fluorescence spectrum of devitrified glass 2laCl 7crystallite luminous intensity compared with corresponding glass basis is significantly improved, and Eu:Sr is described 2laCl 7the luminosity of devitrified glass is better.
Embodiment three: table 3 is glass formula and the first recrystallization temperature value of embodiment three.
Table 3
Concrete preparation process is as follows: the first step, weighs 50 grams of analytical pure raw materials by the formula in table 3, adds 2.5 grams of NH 4hCl 2, raw material is mixed after pour in quartz crucible and melt, temperature of fusion 1480 DEG C, be incubated 1.5 hours, glass melt is poured in pig mold, then be placed in retort furnace to anneal, after 1 hour, be cooled to 50 DEG C with the speed of 10 DEG C/h in glass transformation temperature Tg temperature, close retort furnace power supply and be automatically cooled to room temperature, take out glass.Second step, according to thermal analyses (DTA) experimental data of glass, obtain the first recrystallization temperature 723 DEG C, obtained glass is placed in nitrogen fine annealing stove 740 DEG C of thermal treatments 8 hours, and then be cooled to 50 DEG C with the speed of 5 DEG C/h, close fine annealing stove power supply and be automatically cooled to room temperature, obtain transparent Tb 3+the Sr of ion doping 2laCl 7devitrified glass.
To the Sr of preparation 2laCl 7the spectral quality test of devitrified glass, the Tb of excitation of X-rays 3+ion doping Sr 2laCl 7as shown in Figure 4, its result shows to produce Tb:Sr after Overheating Treatment the fluorescence spectrum of devitrified glass 2laCl 7crystallite luminous intensity compared with corresponding glass basis is significantly improved, and Tb:Sr is described 2laCl 7the luminosity of devitrified glass is better; The rare earth ion doped Sr obtained by above-mentioned preparation process 2laCl 7devitrified glass is transparent and physical and chemical performance is excellent.

Claims (5)

1. a rare earth ion doped Sr 2laCl 7devitrified glass, its Mole percent consists of:
SiO 2：30-40mol％B 2O 3：30-40mol％
Sr 2LaCl 7：20-29mol％LnCl 3：1-10mol％
Wherein LnCl 3for CeCl 3, EuCl 3, TbCl 3in one.
2. rare earth ion doped Sr according to claim 1 2laCl 7devitrified glass, is characterized in that this devitrified glass material component is: SiO 2: 30mol%, B 2o 3: 40mol%, Sr 2laCl 7: 29mol%, CeCl 3: 1mol%.
3. rare earth ion doped Sr according to claim 1 2laCl 7devitrified glass, is characterized in that this devitrified glass material component is: SiO 2: 35mol%, B 2o 3: 35mol%, Sr 2laCl 7: 20mol%, EuCl 3: 10mol%.
4. rare earth ion doped Sr according to claim 1 2laCl 7devitrified glass, is characterized in that this devitrified glass material component is: SiO 2: 40mol%, B 2o 3: 30mol%, Sr 2laCl 7: 25mol%, TbCl 3: 5mol%.
5. rare earth ion doped Sr according to claim 1 2laCl 7the preparation method of devitrified glass, is characterized in that comprising following concrete steps:
(1) SiO 2-B 2o 3-Sr 2laCl 7-LnCl 3be founding of glass: take analytically pure each raw material by material component, add the NH accounting for raw material gross weight 5% 4hCl 2, raw material is mixed, then pours in quartz crucible or corundum crucible and melt, temperature of fusion 1300 -1480 DEG C, insulation 1-2 hour, glass melt is poured in pig mold, then be placed in retort furnace to anneal, after 1 hour, be cooled to 50 DEG C with the speed of 10 DEG C/h in glass transformation temperature Tg temperature, close retort furnace power supply and be automatically cooled to room temperature, take out glass, for micritization thermal treatment;
(2) Sr 2laCl 7the preparation of devitrified glass: according to thermal analyses (DTA) experimental data of glass, obtained glass is placed in nitrogen fine annealing stove heat-treated 7-9 hour near its first crystallization peak, and then be cooled to 50 DEG C with the speed of 5 DEG C/h, close fine annealing stove power supply, automatically be cooled to room temperature, obtain transparent rare earth ion doped Sr 2laCl 7devitrified glass.
CN201410198257.2A 2014-05-08 2014-05-08 Rare earth ion doped Sr 2laCl 7devitrified glass and preparation method thereof Expired - Fee Related CN103951232B (en)

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US4259587A (en) * 1979-10-09 1981-03-31 Rca Corporation X-ray luminescent glasses
US6515795B1 (en) * 2001-06-29 2003-02-04 Corning Incorporated Borosilicate cladding glasses for germanate core thulium-doped amplifiers
CN101265028B (en) * 2008-04-18 2011-05-18 中国计量学院 Rare earth doping LiYF4 microcrystalline glass and preparation method thereof
CN101531459B (en) * 2009-04-20 2012-01-04 北京航空航天大学 Rare earth thulium-doped aluminate fluorescent glass and preparation method thereof
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