Rare-earth-ion-doped Sr2GdBr7 microcrystalline glass and preparation method thereof

A technology of glass-ceramics and rare earth ions, which is applied in the field of rare-earth ion-doped Sr2GdBr7 glass-ceramics and its preparation, can solve the problems of difficulty in growing large-sized crystals, affecting practical applications, poor mechanical properties, etc., and achieves low production cost, Improved efficiency and good mechanical properties

Inactive Publication Date: 2014-07-30
NINGBO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Scintillation crystals generally have the advantages of radiation resistance, fast decay, and high light output, but scintillation crystals also have the following serious disadvantages: difficult to prepare, expensive
But Sr 2 GdBr 7 The crystal is easy to deliquescence, the mechanical properties are poor, and it is easy to be cleaved into flakes. It is difficult to grow large-sized crystals, and the high price affects its practical application.

Method used

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  • Rare-earth-ion-doped Sr2GdBr7 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped Sr2GdBr7 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped Sr2GdBr7 microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Table 1 shows the glass formula and the first crystallization temperature value of Embodiment 1.

[0024] Table 1 shows the glass formulation and the first crystallization temperature value of Example 1.

[0025] Table 1

[0026]

[0027] The specific preparation process is as follows: first step, weigh 50 grams of pure raw materials for analysis according to the formula in Table 1, mix the raw materials evenly and pour them into a quartz crucible for melting, the melting temperature is 800 ° C, keep warm for 2 hours, pour the glass melt into Put it in a cast iron mold, then place it in a muffle furnace for annealing, keep it at the glass transition temperature Tg for 1 hour, then cool it down to 50°C at a rate of 10°C / hour, turn off the power of the muffle furnace and automatically cool it down to room temperature, and take out the glass; In the second step, according to the glass thermal analysis (DTA) experimental data, the first crystallization tem...

Embodiment 2

[0029] Embodiment 2: Table 2 shows the glass formula and the first crystallization temperature value of Embodiment 2.

[0030] Table 2

[0031]

[0032]The specific preparation process is as follows: first step, weigh 50 grams of analytical pure raw materials according to the formula in Table 2, mix the raw materials evenly and pour them into a corundum crucible for melting, the melting temperature is 900 ° C, keep warm for 1 hour, pour the glass melt Put it in a cast iron mold, then place it in a muffle furnace for annealing, keep it at the glass transition temperature Tg for 1 hour, then cool it down to 50°C at a rate of 10°C / hour, turn off the power of the muffle furnace and automatically cool it down to room temperature, and take out the glass; In the second step, according to the glass thermal analysis (DTA) experimental data, the first crystallization temperature is 465°C, and the prepared glass is placed in a nitrogen precision annealing furnace for heat treatment at...

Embodiment 3

[0034] Embodiment 3: Table 3 shows the glass formula and the first crystallization temperature value of Embodiment 3.

[0035] table 3

[0036]

[0037] The specific preparation process is as follows: first step, weigh 50 grams of pure raw materials for analysis according to the formula in Table 3, mix the raw materials evenly and pour them into a quartz crucible for melting, the melting temperature is 850 ° C, keep warm for 1.5 hours, pour the glass melt into Put it in a cast iron mold, then place it in a muffle furnace for annealing, keep it at the glass transition temperature Tg for 1 hour, then cool it down to 50°C at a rate of 10°C / hour, turn off the power of the muffle furnace and automatically cool it down to room temperature, and take out the glass. In the second step, according to the glass thermal analysis (DTA) experimental data, the first crystallization temperature is 467°C, and the prepared glass is placed in a nitrogen precision annealing furnace at 477°C for...

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Abstract

The invention discloses a rare-earth-ion-doped Sr2GdBr7 microcrystalline glass and a preparation method thereof. The microcrystalline glass is composed of the following components in percentage by mole: 74-80 mol% of TeO2, 9.5-12 mol% of BaF2, 10-15 mol% of Sr2GdBr7 and 0.5-2 mol% of LnBr3. The LnBr3 is CeBr3, EuBr3, TbBr3, PrBr3 or NdBr3. The preparation method comprises the following steps: preparing TeO2-BaF2-Sr2GdBr7-LnBr3 glass by a fusion process, and carrying out heat treatment to obtain the transparent Sr2GdBr7 microcrystalline glass. The Sr2GdBr7 microcrystalline glass has the advantages of deliquescence resistance, favorable mechanical properties, higher short-wavelength blue-violet light transmission rate, strong light output, quick attenuation, favorable energy resolution, favorable time resolution and the like. The preparation method of the microcrystalline glass is simple and lower 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 Sr used as a scintillation material 2 GdBr 7 Glass-ceramic and its preparation method. Background technique [0002] Scintillation material is a light functional material that can emit visible light under the excitation of high-energy rays (such as x-rays, γ-rays) or other radioactive particles. It is widely used in nuclear medicine diagnosis, high-energy physics and nuclear physics experimental research, industry and geology. exploration and other fields. Depending on the application field, the requirements for scintillators are also different, but in general scintillator materials should have the following characteristics: high luminous efficiency, fast fluorescence decay, high density, low cost and good radiation resistance. Scintillation crystals generally have the advantages of radiation resistance, fast decay, and high light output, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 欧阳绍业张约品夏海平张为欢王倩杨斌
Owner NINGBO UNIV
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