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A borophosphate scintillation glass for thermal neutron detection and its preparation method

A scintillation glass and thermal neutron technology, applied in rare earth ion-doped borophosphate scintillation glass and preparation thereof, borophosphate scintillation glass for thermal neutron detection and preparation thereof, can solve the problem of high preparation temperature and neutron capture problems such as low element content, to achieve the effect of simple preparation process, short preparation cycle and easy adjustment of chemical composition

Inactive Publication Date: 2016-11-02
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention aims to overcome existing Ce 3+ The preparation method of phosphate scintillation glass with ions as the luminescent center has defects such as high preparation temperature and low content of neutron capture elements in the glass. The invention provides a borophosphate scintillation glass for thermal neutron detection and its preparation method

Method used

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  • A borophosphate scintillation glass for thermal neutron detection and its preparation method
  • A borophosphate scintillation glass for thermal neutron detection and its preparation method
  • A borophosphate scintillation glass for thermal neutron detection and its preparation method

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preparation example Construction

[0033] The method for preparing rare earth ion-doped borophosphate scintillation glass for thermal neutron detection specifically includes the following steps:

[0034] 1) Accurately weigh each raw material according to the composition of the scintillation glass, and mix all the raw materials evenly. The Li 2 The O raw material is mainly composed of lithium carbonate (Li 2 CO 3 ) introduced, B 2 o 3 The raw material is boron oxide (B 2 o 3 ) or boric acid (H 3 BO 3 ) introduction; P 2 o 5 The raw material is ammonium dihydrogen phosphate (NH 4 h 2 PO 4 ) is introduced, and the doped Ce 3+ Ions can be introduced in the form of corresponding oxides, halides, carbonates, nitrates or sulfates; the purity of all raw materials should be analytically pure or above;

[0035] 2) Then pour it into an alumina crucible or platinum crucible and melt it into a glass melt. The melting temperature is 700-950°C. After melting, keep it warm for 0.5-3 hours. The working atmosphere ...

Embodiment 1

[0054] 1. Preparation

[0055] According to the specific glass composition of Example 1 in Table 1, the glass raw materials were accurately weighed, and after the glass raw materials were fully ground in an agate mortar for 15 minutes, they were directly placed in a high-temperature electric furnace at 865° C. for 30 minutes to obtain a uniform glass melt. Subsequently, the above melt was poured into a stainless steel mold with a preheating temperature of 300°C for casting, and the formed glass was quickly placed in a muffle furnace at 300°C for 5 hours for annealing treatment. The obtained scintillating glass primary product is processed into 10×10×2mm after cutting, surface grinding and polishing 3 The scintillation glass of the present invention. Such as figure 1 As shown, the invented scintillation glass has a high optical transmittance of more than 80% in the wavelength range of 320-800nm;

[0056] 2. Test

[0057] Using a fluorescence spectrometer (Hitachi F-4600, Ex...

Embodiment 2

[0063] According to the specific glass composition of Example 2 in Table 1, the glass raw materials were accurately weighed, and after fully grinding the glass raw materials in an agate mortar for 15 minutes, they were directly placed in a high-temperature electric furnace at 865° C. for 30 minutes to obtain a uniform glass melt. Subsequently, the above melt was poured into a stainless steel mold with a preheating temperature of 300°C for casting, and the formed glass was quickly placed in a muffle furnace at 300°C for 5 hours for annealing treatment. The obtained scintillating glass primary product is processed into 10×10×2mm after cutting, surface grinding and polishing 3 The scintillation glass of the present invention. Such as image 3 As shown, it has a fast decay time of 28.5 ns when UV light excites the scintillation glass.

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Abstract

The invention relates to phosphate scintillation glass for thermal neutron detection and a preparation method thereof. The scintillation glass is prepared by virtue of a high-temperature melting process; the scintillation glass comprises a substrate and a light emitting center; the composition system of the substrate is Li2O-B2O3-P2O5, wherein the proportions of the components in the substrate are as follows: 20-60mol% of Li2O, 0-80mol% of B2O3 and 0-55mol% of P2O5, and the sum of the proportions of the components is 100%; and the light emitting center is Ce<3+> ions, and the molar content of the Ce<3+> ions relative to the sum of the molar weights of the components in the substrate is 0.05-5mol%.

Description

technical field [0001] The invention relates to a borophosphate scintillation glass for thermal neutron detection and a preparation method thereof, in particular to a rare earth ion-doped borophosphate scintillation glass and a preparation method thereof, belonging to the field of luminescent materials. Background technique [0002] Scintillation material is a photofunctional material that converts the ionization energy of high-energy particles such as α, β, γ-rays or X-rays into ultraviolet / visible light. It has been widely used in fields such as imaging and safety detection. The neutron is an uncharged subatomic strong particle that does not cause ionization of matter and hardly interacts with extranuclear electrons. At present, the detection of neutrons is often realized by the detection of secondary particles produced by the interaction between neutrons and atomic nuclei. Therefore, to achieve effective detection of thermal neutrons, the scintillation material matrix m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/19C03C4/12
Inventor 郑丽华陈昊鸿孙心瑗毛日华张志军赵景泰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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