Method for reducing breakage rate of quartz tubes during preparation of scintillation single crystals
A preparation process, quartz tube technology, applied in the direction of single crystal growth, single crystal growth, chemical instruments and methods, etc., can solve the large volume change of scintillation crystal material with temperature, low expansion coefficient of scintillation crystal material, and small expansion coefficient of quartz tube and other problems, to achieve the effect of reducing the risk of crystal cracking, reducing the probability of self-absorption, and reducing internal stress
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[0039] The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited by the embodiments.
[0040] figure 2 It is a schematic diagram of the special-shaped quartz tube adopted in the present invention, image 3 It is a schematic diagram of the arrangement of quartz tubes in a single crystal furnace.
[0041] Take sodium iodide doped indium (NaI:In) scintillation single crystal material as an example:
[0042] (1) Quartz tube drawing
[0043] Choose a quartz tube with no defects and a smooth inner wall, wash it repeatedly with deionized water, dry it, and heat it to 1900-2000°C with an oxygen-hydrogen flame to soften the quartz tube, and draw it into a special-shaped quartz tube with a thick top and a thin bottom;
[0044] (2) Inner wall coating of special-shaped quartz tube
[0045] The above-mentioned special-shaped quartz tube is repeatedly washed with deionized wate...
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