Divalent europium sulfide near-infrared scintillator and preparation method thereof
A sulfide, near-infrared technology, applied in the preparation/processing of rare earth metal compounds, rare earth metal sulfides, chemical instruments and methods, etc., can solve problems such as easy deliquescence, and achieve simple preparation methods, high radiation resistance and humidity. The effect of stability
Active Publication Date: 2022-07-22
SUZHOU UNIV
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Problems solved by technology
Currently only three contain Eu 2+ The iodide compound of P.Dorenbos group achieves this goal, SrI 2 :Eu 2+ 、Sm 2+ 、CsBa 2 I 5 :Eu 2+ 、Sm 2+ and BaBrI:Eu 2+ 、Sm 2+[1-3] , but unfortunately they are particularly prone to deliquescent
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Embodiment 1
[0037] Example 1: Synthesis of divalent europium sulfide near-infrared scintillator Eu3 SiS 4 Te
[0038] According to the ratio of 3:1:4.4:1, put europium oxide, silicon powder, sulfur powder, tellurium powder, boron powder and excess cesium chloride co-solvent in a mortar, fully grind them and transfer them to a quartz tube. Seal with oxyhydrogen machine. The sample was then placed in a muffle furnace, heated to 950° C. in half a day, and then slowly lowered to room temperature after three days of maintenance. After ultrasonic cleaning of the product with deionized water and ethanol, drying was performed at room temperature to obtain the product Eu 3 SiS 4 Te.
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The invention discloses a divalent europium sulfide near-infrared scintillator, the divalent europium sulfide near-infrared scintillator is a crystal material, the chemical formula of the divalent europium sulfide near-infrared scintillator is Eu3SiS4Te, the cell parameters of the divalent europium sulfide near-infrared scintillator are alpha = beta = gamma = 90 degrees, and the space group of the divalent europium sulfide near-infrared scintillator is Cmcm. The invention also provides a preparation method of the divalent europium sulfide near-infrared scintillator, which comprises the following steps: mixing and grinding europium oxide, silicon powder, sulfur powder, boron powder, tellurium powder and excessive fluxing agent, sealing in vacuum, and calcining at 850-950 DEG C to enable the raw materials to react; and after the reaction is finished, a product Eu3SiS4Te is obtained. The divalent europium sulfide near-infrared scintillator provided by the invention has excellent radiation resistance and humidity stability.
Description
technical field [0001] The invention relates to the technical field of optoelectronic materials, in particular to a divalent europium sulfide near-infrared scintillator and a preparation method thereof. Background technique [0002] Scintillation materials refer to the process in which materials absorb high-energy particles (α, β particles) or rays (X, γ) and then emit visible light. ” process (ray-visible light-photoelectric conversion-imaging), so such materials are used in high-energy physics and nuclear physics experiments, space and astrophysics, medical imaging, environmental monitoring, security inspection, nuclear non-proliferation testing, industrial non-destructive testing, petroleum testing It has a wide range of applications in fields such as wells and geological exploration. The scintillators currently used on a large scale are inorganic scintillators, which are evaluated for their high light yield, high energy resolution, and fast response. [0003] Due to th...
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IPC IPC(8): C09K11/88C01F17/10C01F17/288G01T1/202
CPCC09K11/886G01T1/2023C01F17/288C01F17/10C01P2006/60Y02B20/00
Inventor 王殳凹王亚星杨良伟
Owner SUZHOU UNIV