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Rare earth doping metal halogenide photostimulable phosphor glass and preparation thereof

A metal halide and rare earth doping technology, which is applied in the field of rare earth doped metal halide-based luminescent phosphor glass and its preparation, can solve the problems of difficult control of material properties, many steps and procedures, and high production cost, and achieve Reduce the absorption of light signals, enhance the luminous intensity, and reduce the effects of external interference factors

Inactive Publication Date: 2008-12-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whether the preparation method is a liquid phase method or a solid phase synthesis method, especially the pulverization of the powder after firing is necessary, which has the difficulty of particle shape control that affects sensitivity and image performance. In addition, the entire sheet production process involves There are many steps and processes, the performance of the material is not easy to control, and the production cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) First, vacuumize the glove box (Japan Sekisui Machinery Co., Ltd., MDB-2BL type), and control the vacuum degree of the glove box body to not be higher than 1×10 -1 Torr, saddlebag vacuum not higher than 5×10 -2 Torr, the oxygen content is below 100ppb, the moisture value is below 1.47ppb, then fill the glove box with nitrogen or argon with the same pressure as the surrounding atmosphere; then in the glove box, the molar percentage composition: 40 moles of AlF 3 -, 44.9 moles of BaF 2 , 5 M BaCl 2 , 10 moles of YF 3 , 0.1 mol EuF 3 , weighing a total of 20g of raw materials, the purity of the above-mentioned raw materials is not less than 99.95%, and the above-mentioned components are fully mixed and placed in a graphite crucible;

[0034] (2), the graphite crucible of above-mentioned charge is put into the small-scale high-frequency induction heating device (Japan Miwa Works, MU-1700C) that is placed in the glove box, heats up rapidly, simultaneously in the heat...

Embodiment 2

[0036] (1), the vacuum treatment of glove box is the same as embodiment 1, then in glove box by mole percentage composition: the AlF of 25 moles 3 -, 65 moles of BaF 2 , 1 M BaCl 2 , 8.5 moles of YF 3 , 0.5 mol EuF 3 , weighing a total of 20g of raw materials, the purity of the above-mentioned raw materials is not less than 99.95%, and the above-mentioned components are fully mixed and placed in a graphite crucible;

[0037] (2), the graphite crucible of above-mentioned charging is put into the small-sized high-frequency induction heating device identical with embodiment 1, heats up rapidly, feeds Cl in the heating chamber of high-frequency induction heating device simultaneously 2 Gas for atmosphere protection, where the flow rate of chlorine gas is 6ml / s, heated to 900 ° C and kept for 35 minutes, so that the raw materials are melted into liquid state, and then cooled to obtain rare earth doped metal halide system luminescent phosphor glass.

Embodiment 3

[0039] (1), the vacuum treatment of glove box is the same as embodiment 1, then in glove box by mole percentage composition: the AlF of 25 moles 3 , 40 M BaF 2 , 12 M BaCl 2 , 3 moles of SrBr 2 , 19 moles of YF 3 , 1 mol EuF 3 , weighing a total of 20g of raw materials, the purity of the above-mentioned raw materials is not less than 99.95%, and the above-mentioned components are fully mixed and placed in a graphite crucible;

[0040] (2), the graphite crucible of above-mentioned charging is put into the small-sized high-frequency induction heating device identical with embodiment 1, heats up rapidly, feeds Cl in the heating chamber of high-frequency induction heating device simultaneously 2 Gas for atmosphere protection, where the flow rate of chlorine gas is 15ml / s, heated to 950 ° C for 20 minutes, the raw materials are melted into a liquid state, and then cooled to obtain rare earth-doped metal halide system luminescent phosphor glass.

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Abstract

The invention provides a rare earth-doped metal halide photostimulated luminescence glass and a method for preparing the same characterized in that the mol percentage composition of the glass is as follows: AlF3 25-40%, BaF2 25-63%, BaCl2 1-15%, BaBr2 1-15%, YF3 10-20%, EuF3 0.1-1%, wherein X is one or two selected from one valence halide ions Cl<-> and Br<->. The rare earth-doped metal halide photostimulated luminescence glass is obtained by melting for 10-45 minutes in a high-frequency furnace under the chlorine or inert atmosphere protection at 800-1000 DEG C and cooling. The method of the invention not only simplifies the preparation steps of the radiation image storage materials of photostimulated liminescence glass, eliminates the external interference factors during the preparation process to work high efficiently, increases the luminous intensity of the rare earth ion in the glass, but also has advantage of rapid heating and cooling.

Description

technical field [0001] The invention relates to a rare-earth-doped metal halide system luminescent phosphor glass for medical use and a preparation method thereof. Background technique [0002] As an effective diagnostic method instead of the conventional radiographic method, there is a radiographic image recording and reproducing method using an incandescent phosphor as described in Japanese Patent No. 55-12145 and the like. This method is a method of using a radiation image conversion plate (referred to as an accumulative phosphor sheet) containing an exhaustive phosphor, and the exhaustive phosphor absorbs radiation that passes through the subject or is generated by the subject. , using electromagnetic waves such as visible light and ultraviolet rays (called excitation light) to excite the exhaustive phosphor in time series, so that the accumulated radiation energy is emitted as fluorescence (called exhaustive luminescence), and it is read photoelectrically. This fluores...

Claims

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Application Information

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IPC IPC(8): C03C4/12C03C3/32
Inventor 邱建备宋志国周大成
Owner KUNMING UNIV OF SCI & TECH
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