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Rare-earth-ion-doped LiLuCl4 microcrystalline glass and preparation method thereof

A technology of glass-ceramic and rare-earth ions, which is applied in the field of rare-earth ion-doped LiLuCl4 glass-ceramic and its preparation, can solve the problems of difficult growth of large-size crystals, affecting practical application, poor mechanical properties, etc., and achieves excellent scintillation performance, Low production cost 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 LiLuCl 4 The crystal is easy to deliquescence, the mechanical properties are poor, and it is easy to cleavage 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 LiLuCl4 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped LiLuCl4 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped LiLuCl4 microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0024] Table 1

[0025]

[0026] The specific preparation process is as follows: In the first step, weigh 50 grams of analytically pure raw materials according to the formula in Table 1, and add 2.5 grams of NH 4 HF 2 , 2.5 grams of NH 4 HCl 2 , After mixing the raw materials evenly, pour them into a quartz crucible and melt them at a melting temperature of 1300°C. Keep holding for 2 hours. Pour the glass melt into a cast iron mold, then place it in a muffle furnace for annealing, and keep it at the glass transition temperature Tg. After hours, the temperature is reduced to 50°C at a rate of 10°C / hour, the muffle furnace is turned off and the temperature is automatically reduced to room temperature, and the glass is taken out; in the second step, according to the thermal analysis (DTA) experimental data of the glass, the first crystallization temperature is 695 ℃, put the pre...

Embodiment 2

[0028] Example 2: Table 2 shows the glass formula and the first crystallization temperature value of Example 2.

[0029] Table 2

[0030]

[0031] The specific preparation process is as follows: In the first step, weigh 50 grams of analytically pure raw materials according to the formula in Table 2, and add 2.5 grams of NH 4 HF 2 , 2.5 grams of NH 4 HCl 2 , After mixing the raw materials evenly, pour them into a corundum crucible and melt them at a melting temperature of 1400°C and keep them warm for 1 hour. Pour the glass melt into the cast iron mold, then place it in a muffle furnace for annealing, and keep it at the glass transition temperature Tg. After hours, the temperature is reduced to 50°C at a rate of 10°C / hour, the muffle furnace is turned off and the temperature is automatically reduced to room temperature, and the glass is taken out; in the second step, according to the thermal analysis (DTA) experimental data of the glass, the first crystallization temperature is 705 ...

Embodiment 3

[0033] Example 3: Table 3 shows the glass formula and the first crystallization temperature value of Example 3.

[0034] table 3

[0035]

[0036] The specific preparation process is as follows: In the first step, weigh 50 grams of analytically pure raw materials according to the formula in Table 3, and add 2.5 grams of NH 4 HF 2 , 2.5 grams of NH 4 HCl 2 , After mixing the raw materials evenly, pour them into a quartz crucible and melt them at a melting temperature of 1480°C and hold for 1.5 hours. Pour the glass melt into a cast iron mold, then place it in a muffle furnace for annealing, and keep it at the glass transition temperature Tg. After hours, the temperature is lowered to 50°C at a rate of 10°C / hour, the muffle furnace is turned off and the temperature is automatically reduced to room temperature, and the glass is taken out. In the second step, according to the thermal analysis (DTA) experimental data of the glass, the first crystallization temperature is 714℃, and the g...

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Abstract

The invention discloses a rare-earth-ion-doped LiLuCl4 microcrystalline glass and a preparation method thereof. The microcrystalline glass is composed of the following components in percentage by mole: 20-30 mol% of SiO2, 25-35 mol% of B2O3, 20-29 mol% of BaF2, 15-20 mol% of LiLuCl4 and 1-5 mol% of LnCl3. The LnCl3 is CeCl3, EuCl3, TbCl3, PrCl3, NdCl3 or DyCl3. The preparation method comprises the following steps: preparing SiO2-B2O3-BaF2-LiLuCl4-LnCl3 glass by a fusion process, and carrying out heat treatment to obtain the transparent LiLuCl4 microcrystalline glass. The LiLuCl4 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 invention relates to a rare earth ion doped glass ceramic, in particular to a rare earth ion doped LiLuCl used as a scintillation material 4 Glass-ceramic and its preparation method. Background technique [0002] Scintillation materials are light functional materials that can emit visible light under the excitation of high-energy rays (such as x-rays, gamma rays) or other radioactive particles. They are widely used in nuclear medicine diagnosis, high-energy physics and nuclear physics experimental research, industry and geology Exploration and other fields. The requirements for scintillators vary according to different application fields, but in general, scintillation 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 attenuation, and high light output. However, sci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16
Inventor 王倩张约品夏海平杨斌张为欢欧阳绍业
Owner NINGBO UNIV
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