Ce < 3 + >-doped silicate scintillation glass as well as preparation method and application thereof

A technology of scintillation glass and silicate, which is applied in glass manufacturing equipment, glass molding, and measurement with scintillation detectors, etc., can solve the problems of low fluorescence emission efficiency and narrow fluorescence emission spectrum, so as to improve fluorescence emission efficiency and tissue Good uniformity and the effect of promoting precipitation

Pending Publication Date: 2020-08-07
MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned scintillators still have problems such as narrow fluorescence emission spectrum and low fluorescence emission efficiency, which need to be paid attention to and solved urgently.

Method used

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  • Ce &lt; 3 + &gt;-doped silicate scintillation glass as well as preparation method and application thereof
  • Ce &lt; 3 + &gt;-doped silicate scintillation glass as well as preparation method and application thereof
  • Ce &lt; 3 + &gt;-doped silicate scintillation glass as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0048] Above Ce 3+ The preparation method of doped silicate scintillation glass comprises the following steps:

[0049] Step 1: Weigh a certain amount of LiOH, MgO, Al with a purity ≥ 99.99% in proportion 2 O 3 , SiO 2 , CeO 2 The powder adopts planetary ball milling method, uses zirconia ceramic tank as the ball milling container, uses zirconia balls and absolute ethanol as the ball milling medium, the ball milling speed is 500-800r / min, the ball milling time is 24-48h, mix well to get the first mixture. To introduce into the glass matrix 6 Li nuclide, to contain 6 Li hydride was used as raw material, using deionized water and 6 The Li hydride powder was slowly reacted in a plastic beaker, and a plastic glass rod was used to continuously stir during the reaction to obtain a colorless and transparent 6 LiOH solution, and then in a vacuum oven, at 120 ° C ~ 150 ° C for 8 ~ 10 hours to obtain dry 6 LiOH powder, as a substitute for LiOH, with MgO, Al 2 O 3 , SiO 2 , C...

Embodiment 1

[0065] In this example, Ce was prepared from calcined raw material powder. 3+ Doping silicate scintillation glass, the specific steps are as follows.

[0066] Step 1: According to Ce 3+ Chemical formula of doped silicate scintillation glass (Li 2 O:MgO:Al 2 o 3 :SiO2 2 : Ce 2 o 3 =15:3:25:57:0.8), according to its molar stoichiometric ratio, weigh Li respectively 2 CO 3 , MgO, Al 2 o 3 , SiO 2 , CeO 2 Powder 2.25g, 0.60g, 12.75g, 17.10g, 1.376g, and then use zirconia ceramic pot as grinding container, use absolute ethanol and zirconia balls as grinding media, adopt a ball mill with a rotating speed of 650r / min and a ball milling time of 36h The weighed raw material powders are mixed by means of a planetary ball mill to obtain a first mixture with uniform color and thickness.

[0067] Step 2: Place the first mixture obtained in step 1 in an electric drying oven in the atmosphere, dry it at a constant temperature of 135°C for 4 hours, and then perform a calcination ...

Embodiment 2

[0073] In this example, Ce was prepared from calcined raw material powder. 3+ Doping silicate scintillation glass, and subjecting the prepared glass to crystallization heat treatment, the specific steps are as follows.

[0074] Step 1: According to Ce 3+ Chemical formula of doped silicate scintillation glass (Li 2 O:MgO:Al 2 o 3 :SiO2 2 : Ce 2 o 3 =15:3:25:57:0.8), according to its molar ratio, weighed respectively 6 LiH powder, MgO, Al 2 o 3 , SiO 2 , CeO 2 Powder 1.05g, 0.60g, 12.75g, 17.10g, 1.376g, using deionized water and 6 The LiH powder reacted slowly in a plastic beaker, and a plastic glass rod was used to continuously stir during the reaction to obtain a colorless and transparent 6 LiOH solution, and then in a vacuum oven, at 130 ° C for 9 hours to obtain dry 6 LiOH powder, then mixed with MgO, Al 2 o 3 , SiO 2 , CeO 2 The powder is mixed by planetary ball milling, using zirconia ceramic tank as the grinding container, anhydrous ethanol and zirconia ...

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Abstract

The invention discloses Ce < 3 + > doped silicate scintillation glass as well as a preparation method and application thereof. The Ce < 3 + >-doped silicate scintillation glass comprises the followingcomponents: Li2O, MgO, Al2O3, SiO2 and Ce2O3, and the fluorescence emission efficiency of the Ce < 3 + >-doped silicate scintillation glass under the excitation of cathode rays is 4.65 times that ofbismuth germanate crystals. The main process of the preparation method is as follows: calcining precursor powder to generate a microcrystalline phase component in the precursor powder, melting, casting and annealing the powder to form amorphous glass, and carrying out crystallization heat treatment to precipitate the microcrystalline phase again and enhance the precipitation ratio, thereby greatlywidening the fluorescence emission spectrum of the scintillation glass and enhancing the fluorescence emission efficiency of the scintillation glass. The invention can be used for manufacturing a scintillation detector, and can also be used for thermal neutron detection when 6Li nuclide is introduced.

Description

technical field [0001] The invention relates to the technical field of silicate scintillation materials, in particular to a Ce 3+ Doped silicate scintillation glass, its preparation method and application. Background technique [0002] Scintillation material is a photoconductive luminescent material that converts the ionization energy of high-energy photons (X-rays, γ-rays) or particles (neutrons, electrons, protons, α-particles, etc.) into ultraviolet or visible photons. It is an energy conversion Body, also known as scintillator. [0003] In recent years, scintillation materials have been widely used in the fields of high energy physics, nuclear physics, astrophysics, geophysics, industrial flaw detection, medical imaging and safety detection. Currently the most studied and widely used scintillator is Bi 4 Ge 3 O 12 (BGO), CeF 3 , PbWO 4 (PWO) etc. However, such scintillators are less suitable for neutron detection. Due to Ce 3+ The emission belongs to the 5d-4f ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/12C03C4/12C03C3/095C03B19/02C03B32/02C03B1/00G01N21/64G01T3/06
CPCC03C10/0027C03C4/12C03C3/095C03C4/0042C03B19/02C03B32/02C03B1/00G01T3/06G01N21/6428G01N2021/6432
Inventor 陈艳平罗德礼李强雷洪波程浩唐贤臣黄斌
Owner MATERIAL INST OF CHINA ACADEMY OF ENG PHYSICS
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