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A borate scintillation material

A scintillation material, borate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of unstable chemical properties, long decay life, low light yield, etc., to achieve the reaction conditions and requirements of simple equipment, attenuation The effect of short life and high light yield

Active Publication Date: 2016-08-17
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Currently commercialized scintillation materials have some disadvantages: although the commercialized halide scintillation material NaI(Tl) has been applied in the first generation of PET equipment, it has long decay life (230ns) and unstable chemical properties ( Deliquescence) and other problems limit its further application in detectors; the commercialized germanate scintillation material BGO is chemically more stable than the former, but its shortcoming of long decay lifetime (300ns) also limits its application; The commercial tungstate scintillation material PWO has a shorter decay lifetime (10ns) than the former, but its low light yield limits its application outside high-energy physics.

Method used

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  • A borate scintillation material
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Examples

Experimental program
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Effect test

Embodiment 1

[0057] Nitriding doped Ba of the present invention 3 InB 9 o 18 preparation of

[0058] Weigh BaCO according to the molar ratio of Ba:In:B is 3.0:1.0:9.0 (+0.02~0.06) 3 、In 2 o 3 and H 3 BO 3 ; pre-sintering after grinding; melting after cooling; then annealing, grinding after cooling to obtain Ba 3 InB 9 o 18 Powder; the Ba 3 InB 9 o 18 The powder and urea powder are placed adjacent to the center of the heating zone of the quartz tube of the tube furnace. After the quartz tube is evacuated, the quartz tube is filled with Ar gas; Ba 3 InB 9 o 18 powder. figure 1 It is the nitride-doped Ba prepared in Example 1 3 InB 9 o 18 and Ba 3 InB 9 o 18 The X-ray diffraction patterns of the two have the same diffraction peaks, indicating that the crystal structure has not changed after nitriding doping. figure 2 Is the nitrogen-doped Ba prepared in Example 1 of the present invention 3 InB 9 o 18 and Ba 3 InB 9 o 18 The X-ray photoelectron energy spectrogram,...

Embodiment 2

[0069] In the preparation conditions of Example 1, the placed urea powder was changed to placed biuret powder, and other synthesis conditions were unchanged to prepare the nitriding doped Ba with biuret as the nitrogen source. 3 InB 9 o 18 . Figure 10 For the X-ray diffraction pattern of the synthetic sample of this embodiment, Figure 11 It is the X-ray photoelectron spectrum of the sample synthesized in this embodiment.

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Abstract

The invention discloses a borate scintillating material with high scintillating performance prepared by basing on a nitriding doping technology. Ba3In9O18 serves as a base body of the scintillating material, by means of the nitriding doping technology, Ba3In9O18 powder is arranged near urea powder under an Ar atmosphere in a heating region of a quartz tube of a tube type furnace, and central annealing is carried out on the Ba3In9O18 powder to obtain nitriding doping Ba3In9O18. By controlling the annealing time, the nitriding doping concentration can be regulated. The photoyield of the Ba3In9O18 which is treated in a nitriding doping mode approximate to ten times of commercial BGO, the service life of the Ba3In9O18 is shorter than PWO (10 ns), and the stability is high. The result shows that the Ba3In9O18 which is treated in a nitriding doping mode is a material with the high scintillating performance, the preparation method is simple and rapid, and the application prospect of industrialized production is achieved.

Description

technical field [0001] The invention relates to the field of high-performance scintillation materials, in particular borate scintillation materials. Background technique [0002] Scintillation materials are used in the detection of high-energy particles such as X-rays and γ-rays, and have mature and extensive applications in the fields of medical diagnosis, nuclear physics, high-energy physics, industrial non-destructive flaw detection, and mining prospecting. In the medical field, medical imaging equipment such as nuclear magnetic resonance (MRI) and positron emission tomography (PET) represent the highest level of medical diagnosis at present, and their cores are scintillation detectors made of scintillation materials; In the field of physics and nuclear physics, scintillation materials are used by scientific research institutions in many countries as the core materials of electromagnetic energy devices and detectors in electron-positron colliders. In recent years, with t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/63
Inventor 蔡格梅汪志勋樊星刘华山金展鹏
Owner CENT SOUTH UNIV
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