Rare-earth-ion-doped K2LaI5 microcrystalline glass and preparation method thereof

A technology of glass-ceramic and rare-earth ions, applied in the field of rare-earth ion-doped glass-ceramic, can solve the problems of difficult growth of large-size crystals, affecting practical applications, poor mechanical properties, etc., and achieves low production cost, improved efficiency, mechanical good performance

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 K

Method used

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  • Rare-earth-ion-doped K2LaI5 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped K2LaI5 microcrystalline glass and preparation method thereof
  • Rare-earth-ion-doped K2LaI5 microcrystalline glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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 HI 2 , After mixing the raw materials uniformly, pour them into a quartz crucible and melt them at a melting temperature of 800°C and hold 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 cooled to room temperature, and the glass is taken out; the second step, according to the thermal analysis (DTA) experimental data of the glass, the first crystallization temperature is 445 ℃, put the prepared gl...

Example Embodiment

[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 HI 2 , After mixing the raw materials evenly, pour them into a corundum crucible and melt them at a melting temperature of 900°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 cooled to room temperature, and the glass is taken out; the second step is to obtain the first crystallization temperature 451 based on the thermal analysis (DTA) experimental data of the glass ℃,...

Example Embodiment

[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 HI 2 , After mixing the raw materials evenly, pour them into a quartz crucible and melt them at a melting temperature of 850°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 lowered 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 455°C, and the pr...

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Abstract

The invention discloses a rare-earth-ion-doped K2LaI5 microcrystalline glass and a preparation method thereof. The microcrystalline glass is composed of the following components in percentage by mole: 65-75 mol% of TeO2, 8-11 mol% of Nb2O5, 5-10 mol% of ZnF2, 10-15 mol% of K2LaI5 and 1-4 mol% of LnI3. The LnI3 is CeI3, EuI3, TbI3, PrI3 or NdI3. The preparation method comprises the following steps: preparing TeO2-Nb2O5-ZnF2-K2LaI5-LnI3 glass by a fusion process, and carrying out heat treatment to obtain the transparent K2LaI5 microcrystalline glass. The K2LaI5 microcrystalline glass has the advantages of deliquescence resistance, favorable mechanical properties, higher short-wavelength blue-violet light transmission rate, superhigh 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 kind of rare earth ion doped K glass used as scintillation material 2 LaI 5 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 ligh...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03C4/12
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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