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CAI2 glass-ceramics doped with rare earth ions and preparation method thereof

A technology of glass ceramics and rare earth ions, which is applied in the field of CaI2 glass ceramics doped with rare earth ions and its preparation, can solve the problems of difficulty in growing large-sized crystals, easy deliquescence of crystals, poor mechanical properties, etc., and achieve superior scintillation performance, Good mechanical properties and low production cost

Inactive Publication Date: 2016-02-03
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 CaI 2 Crystals are prone to deliquescent, poor mechanical properties, easy to cleavage into flakes, difficult to grow large-sized crystals, expensive and other shortcomings affect its practical application

Method used

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  • CAI2 glass-ceramics doped with rare earth ions and preparation method thereof
  • CAI2 glass-ceramics doped with rare earth ions and preparation method thereof
  • CAI2 glass-ceramics doped with rare earth ions and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: Table 1 shows the glass formula and the first crystallization temperature value of Embodiment 1.

[0023] Table 1

[0024]

[0025] 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, add 2.5 grams of NH 4 HF 2 , 2.5 g NH 4 HI 2 , Mix the raw materials evenly and pour them into a corundum crucible for melting, the melting temperature is 1450°C, keep warm for 1 hour, pour the glass melt into a cast iron mold, then place it in a muffle furnace for annealing, and keep warm at the glass transition temperature Tg for 2 Hours later, cool down to 50°C at a rate of 10°C / hour, turn off the power supply of the muffle furnace to automatically cool 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 of 737 ℃, heat-treat the prepared glass in ...

Embodiment 2

[0027] Embodiment 2: Table 2 shows the glass formula and the first crystallization temperature value of Embodiment 2.

[0028] Table 2

[0029]

[0030] 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, add 2.5 grams of NH 4 HF 2 , 2.5 g NH 4 HI 2 , Mix the raw materials evenly and pour them into a quartz crucible to melt, the melting temperature is 1350°C, keep warm for 2 hours, pour the glass melt into a cast iron mold, then place it in a muffle furnace for annealing, and keep warm at the glass transition temperature Tg for 2 hours Hours later, cool down to 50°C at a rate of 10°C / hour, turn off the power supply of the muffle furnace to automatically cool 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 of 731 ℃, heat-treat the prepared glass in...

Embodiment 3

[0032] Embodiment 3: Table 3 shows the glass formula and the first crystallization temperature value of Embodiment 3.

[0033] table 3

[0034]

[0035] 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, add 2.5 grams of NH 4 HF 2 , 2.5 g NH 4 HI 2 , Mix the raw materials evenly and pour them into a quartz crucible to melt. The melting temperature is 1400°C and keep warm for 1.5 hours. Hours later, the temperature was lowered to 50° C. at a rate of 10° C. / hour, the power of the muffle furnace was turned off and the temperature was automatically lowered to room temperature, and the glass was taken out. In the second step, according to the glass thermal analysis (DTA) experimental data, the first crystallization temperature is 742°C, and the prepared glass is placed in a nitrogen precision annealing furnace at 785°C for 5 hours, and then heated at 5°C / hour Cool down to ...

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Abstract

The invention discloses a rare-earth-ion-doped CaI2 microcrystalline glass and a preparation method thereof. The microcrystalline glass is composed of the following components in percentage by mole: 50-60 mol% of P2O5, 10-14 mol% of BaF2, 5-13 mol% of NaF, 5-10 mol% of CaO, 15-20 mol% of CaI2 and 1-4 mol% of rare-earth iodide. The rare-earth iodide is EuI2, CeI3 or TbI3. The preparation method comprises the following steps: preparing P2O5-BaF2-NaF-CaO-CaI2-LnI2 or P2O5-BaF2-NaF-CaO-CaI2-LnI3 glass by a fusion process, and carrying out heat treatment to obtain the transparent CaI2 microcrystalline glass. The CaI2 microcrystalline glass has the advantages of deliquescence resistance, favorable mechanical properties, higher short-wavelength blue-violet light transmission rate, high flare light emission output, favorable energy 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 CaI used as a scintillation material 2 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, but sci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/16C03C4/12
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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