Submillimeter-level high-resolution scintillation crystal array and preparation method and application thereof
A scintillation crystal array and scintillation crystal technology are applied in the directions of crystal growth, chemical instruments and methods, single crystal growth, etc., which can solve the problems of expensive sub-millimeter crystal arrays, low material utilization rate, and decreased yield, etc., and achieve a simple and fast process. Steps, improve resolution, improve the effect of utilization
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Embodiment 1
[0048] Silicate (RE) was prepared by laser heating pedestal method 2 SiO 5 , RE is a mixture of Lu, Y and Ce, Lu:Y:Ce=0.899:0.1:0.001)-based columnar scintillation crystal fiber, and the preparation process includes: 2 O 3 , Y 2 O 3 , CeO 2 , SiO 2 It is prepared according to the chemical formula ratio, mixed evenly, and then made into a material column with a diameter of 0.5-2 mm and compacted in a 200Mpa isostatic press. Put it in a muffle furnace at 1600°C for 10h, then take out the material column and put it on the sample stage of the laser heating base, irradiate the focused laser beam to one end of the material column to melt it, and then use a seed crystal with a diameter of about 1mm to complete it. For seeding and seeding, the diameter of the obtained scintillation crystal optical fiber is controlled by adjusting the pulling speed to be in the range of 0.1-0.5 mm, and the length is preferably 50-500 mm. In the subsequent steps, the average diameter of the obtai...
Embodiment 2
[0050] The columnar scintillation crystal fiber prepared in Example 1 was prepared into a sub-millimeter high-resolution scintillation crystal array: the surface of the scintillation crystal fiber was polished and directly inserted into tungsten dipped in polyvinyl butyral resin with a barium sulfate solid content of more than 60 wt%. It is fixed in the mold and allowed to cure, then it is cut and spliced to the desired array size. Alternatively, the columnar scintillation crystal fiber is pre-cut to the required array thickness size and then inserted into a tungsten mold that has met the target size to be fixed and cured to obtain a submillimeter-scale high-resolution scintillation crystal array.
Embodiment 3
[0052] Preparation of aluminate (RE) by laser heating pedestal method 3 Al 5 O 12 , RE is a mixture of Y and Lu, Y:Lu=0.9:0.1)-based columnar scintillation crystal fiber, and its preparation process includes: mixing Y 2 O 3 , Lu 2 O 3 , Al 2 O 3 It is prepared according to the chemical formula ratio, mixed evenly, and then made into a material column with a diameter of 0.5-2 mm and compacted in a 200Mpa isostatic press. Put it in a muffle furnace at 1400°C for 10h, then take out the material column and put it on the sample stage of the laser heating base, irradiate the focused laser beam to one end of the material column to melt it, and then use a seed crystal with a diameter of about 1mm to complete For seeding and seeding, the diameter of the obtained scintillation crystal fiber is controlled by adjusting the pulling speed to be in the range of 0.1-1 mm, and the length is preferably 50-500 mm. In the subsequent steps, the average diameter of the obtained columnar sci...
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