Rare earth doping metal halogenide photostimulable phosphor phase separation glass and preparation thereof

Abstract

The invention provides a rare earth-doped metal halide photostimulated luminescence phase separation 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 5-63%, BaCl2 1-15%, BaBr2 1-15%, YF3 10-20%, EuF3 0.1-1%. The rare earth-doped metal halide photostimulated luminescence phase separation glass is obtained by melting for 10-45 minutes in a high-frequency current furnace under the chlorine or inert atmosphere protection at 800-1000 DEG C and heat-treating for 0.5-4 hours around the phase separation temperature after cooling. The method of the invention solves the problem that the powder morphology is not easy to control during the agglomeration and milling processes of photostimulated luminescence powder synthesis using solid phase method and liquid phase method, simplifies the preparation steps of the radiation image storage materials of photostimulated liminescence glass, while eliminates the external interference factors during the preparation process, increases the luminous intensity of the rare earth ion in the glass, has advantage of rapid heating and cooling and reduces the volatilization of the halogen component.

Description

technical field [0001] The present invention relates to a rare-earth-doped metal halide system luminous phosphor phase-separation glass and a preparation method thereof, in particular to a rare-earth-doped metal halide luminous (photosmulable) (fluorescence emission enhancing) property for medical use ) Phosphor phase-separated glass and its preparation method. Background technique [0002] As an effective diagnostic method instead of the conventional radiographic method, there is a radiographic image recording and reproducing method using a luminescent 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) ...

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