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Scintillation microcrystalline glass embedded with YAG microcrystalline phase and preparation method of scintillation microcrystalline glass

A technology of glass-ceramics and micro-crystals, which is applied in instruments, analytical materials, and material analysis using wave/particle radiation, etc., can solve the problems of difficult preparation, limited application, high price, etc. The effect of increasing crystal rate

Inactive Publication Date: 2018-06-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used scintillator materials include scintillation crystals and scintillation glass. 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
YAG prepared by Xiang Weidong et al. (application number: 201410781600.6): Ce 3+ Glass-ceramics can only be used in white LEDs due to the limitation of crystallization, transmittance and radiation resistance of matrix glass, which limits its application in scintillation materials for X-ray detection.

Method used

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  • Scintillation microcrystalline glass embedded with YAG microcrystalline phase and preparation method of scintillation microcrystalline glass
  • Scintillation microcrystalline glass embedded with YAG microcrystalline phase and preparation method of scintillation microcrystalline glass
  • Scintillation microcrystalline glass embedded with YAG microcrystalline phase and preparation method of scintillation microcrystalline glass

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare transparent YAG: Ce glass-ceramics, the specific steps are as follows:

[0047] (1) Glass frit mixing: the analytically pure raw materials are mixed according to 24Y 2 o 3 : 75Al 2 o 3 : 1Ce 2 o 3 The proportioning ratio of (molar ratio) is accurately weighed and placed in a mortar, fully ground and mixed in an agate mortar to obtain a uniform glass mixture;

[0048] (2) Glass frit pressing: the glass mixture is placed in the mould, and a desktop electronic tablet press is used for tableting, and the pressure is set at 10Mpa to obtain a flake glass mixture;

[0049] (3) Glass frit pre-firing: put the flake glass mixture into the crucible, then place the crucible in a muffle furnace and pre-fire it in an air atmosphere, raise the temperature from room temperature to 1600 °C at a rate of 5 °C / min, and keep it warm for 1 hour , and finally cooled to room temperature with the furnace to obtain a bulk glass mixture;

[0050] (4) Preparation of glass by non-con...

Embodiment 2

[0054] Prepare transparent YAG: Ce glass-ceramics, the specific steps are as follows:

[0055] (1) Glass frit mixing: the analytically pure raw materials are mixed according to 49YAlO 3 : 50Al 2 o 3 : 1Ce(NO 3 ) 3 The proportioning ratio of (molar ratio) is accurately weighed and placed in a mortar, fully ground and mixed in an agate mortar to obtain a uniform glass mixture;

[0056] (2) Glass frit pressing: the glass mixture is placed in the mould, and the table-top electronic tablet press is used to press the tablet, and the pressure is set to 30Mpa to obtain the flake glass mixture;

[0057] (3) Preparation of glass by non-container method: place the bulk glass mixture on the nozzle of the pneumatic suspension furnace, and use high-purity O 2 Suspend the sample in the air without contact with any utensils; after the suspension is stable, use CO 2 The laser heats the sample and melts it, and keeps it for 1.5 minutes. After the liquid glass frit is mixed evenly, turn of...

Embodiment 3

[0060] Prepare transparent YAG: Tb glass-ceramics, the specific steps are as follows:

[0061] (1) Glass frit mixing: the analytically pure raw materials are mixed according to 20Y 2 o 3 : 60Al 2 o 3 : 20Tb 2 o 3 The proportioning ratio of (molar ratio) is accurately weighed and placed in a mortar, fully ground and mixed in an agate mortar to obtain a uniform glass mixture;

[0062] (2) Glass frit pressing: the glass mixture is placed in the mould, and the table-top electronic tablet press is used to press the tablet, and the pressure is set to 30Mpa to obtain the flake glass mixture;

[0063] (3) Glass frit pre-firing: Put the flake glass mixture into the crucible, then place the crucible in the muffle furnace for pre-firing, raise the temperature from room temperature to 1200 °C at a rate of 5 °C / min, keep it for 4 hours, and finally heat it up with the furnace. Cool to room temperature to obtain bulk glass mixture;

[0064] (4) Preparation of glass by the flame flota...

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Abstract

The invention relates to scintillation microcrystalline glass embedded with a YAG microcrystalline phase and a preparation method of the scintillation microcrystalline glass. The scintillation microcrystalline glass and the preparation method thereof are characterized in that the microcrystalline phase is YAG, activation ions are one or two of Ce<3+> and Tb<3+>, the activation ions are evenly doped into the YAG microcrystalline phase, and the YAG microcrystalline phase is evenly distributed in the scintillation microcrystalline glass; the chemical components of matrix glass are only yttrium oxide and aluminum oxide, the matrix glass is doped with the rare-earth ions Ce<3+> and Tb<3+>, transparent glass is prepared by a container-free solidification method or a flame floatation method, thetransparent glass is subjected to thermal treatment under Tg temperature, and the YAG microcrystalline phase is spontaneously separated out without devitrification; the YAG microcrystalline glass is high in crystallinity and transparency, short in fluorescence service life, excellent in scintillation performance, capable of emitting green light, green and yellow light or yellow light under X-ray excitation and capable of being used as an X-ray detection scintillation material.

Description

technical field [0001] The invention relates to a scintillator luminescent material, in particular to a scintillation glass-ceramic embedded with a YAG microcrystalline phase and a preparation method thereof. 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, industrial and geological exploration, etc. field. 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. Commonly used scintillator materials include scintillation crystals and scintillation glass. Scintillation crystals generally have ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03C4/12G01N23/223
CPCC03C10/00C03C4/12G01N23/223
Inventor 阮健张越鹏靖正阳韩建军赵修建
Owner WUHAN UNIV OF TECH
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