A kind of perovskite X-ray scintillator and preparation method thereof
An X-ray and scintillator technology, applied in the field of perovskite scintillator materials, can solve the problems of low brightness, high cost, insufficient stability, etc., and achieve the effect of simple preparation process and low cost
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Embodiment 1
[0017] Embodiment 1: The perovskite X-ray scintillator of this embodiment, the chemical formula is Cs 2 Zr 0.9 Pb 0.1 Cl 6 ;
[0018] The preparation method of perovskite X-ray scintillator, concrete steps are as follows:
[0019] (1) Add concentrated hydrochloric acid to CsCl, PbCl 2 and ZrCl 4 In the mixture, stir and react for 1.0h to obtain a precursor solution; the concentration of concentrated hydrochloric acid is 12mol / L, CsCl, PbCl 2 and ZrCl 4 The molar ratio of the concentrated hydrochloric acid to the mixture is 2:0.1:0.9; the liquid-solid ratio mL:g is 25:2.8;
[0020] (2) Use a dropper to transfer the precursor solution to a high-pressure hydrothermal reactor, react at a temperature of 150°C for 19h, then cool down to 50°C at a uniform rate at a cooling rate of 0.5°C / h and react for 15h, then cool to room temperature ; Repeatedly adding ethanol and centrifuging to wash and separate the solid and the supernatant; drying the solid in vacuum to obtain the per...
Embodiment 2
[0021] Embodiment 2: The perovskite X-ray scintillator of this embodiment, the chemical formula is Cs 2 Zr 0.85 Pb 0.15 Cl 6 ;
[0022] The preparation method of perovskite X-ray scintillator, concrete steps are as follows:
[0023] (1) Add concentrated hydrochloric acid to CsCl, PbCl 2 and ZrCl 4 In the mixture, stir and react for 1.5h to obtain a precursor solution; the concentration of concentrated hydrochloric acid is 12mol / L, CsCl, PbCl 2 and ZrCl 4 The mol ratio is 2:0.15:0.85; the liquid-solid ratio mL:g of the concentrated hydrochloric acid and the mixture is 25:2.8;
[0024] (2) Use a dropper to transfer the precursor solution to a high-pressure hydrothermal reactor, react at a temperature of 170°C for 12 hours, then cool down to 60°C at a constant rate of 0.5°C / h and react for 13 hours, then cool to room temperature ; Repeatedly adding ethanol and centrifuging to wash and separate the solid and the supernatant; drying the solid in vacuum to obtain the perovsk...
Embodiment 3
[0025] Embodiment 3: The perovskite X-ray scintillator of this embodiment, the chemical formula is Cs 2 Zr 0.84 Pb 0.16 Cl 6 ;
[0026] The preparation method of perovskite X-ray scintillator, concrete steps are as follows:
[0027] (1) Add concentrated hydrochloric acid to CsCl, PbCl 2 and ZrCl 4 In the mixture, stir and react for 1.2h to obtain a precursor solution; the concentration of concentrated hydrochloric acid is 9mol / L, CsCl, PbCl 2 and ZrCl 4 The molar ratio is 2:0.16:0.84; the liquid-solid ratio mL:g of the concentrated hydrochloric acid and the mixture is 25:2;
[0028] (2) Use a dropper to transfer the precursor solution to a high-pressure hydrothermal reactor, react at a temperature of 180°C for 11 hours, then cool down to 50°C at a constant rate of 0.55°C / h and react for 18 hours, then cool to room temperature ; Repeatedly adding ethanol and centrifuging to wash and separate the solid and the supernatant; drying the solid in vacuum to obtain the perovsk...
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