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Radiation shielding glass and preparation method thereof

A radiation shielding and glass technology, applied in the field of radiation shielding glass and its preparation, can solve the problems of weak radiation resistance, poor heat resistance and mechanical properties, poor radiation shielding effect, etc., and achieve good shielding ability, heat resistance temperature High, good mechanical properties

Inactive Publication Date: 2016-10-12
北京玻璃研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned materials still have the following deficiencies: poor radiation shielding effect, poor heat resistance and mechanical properties, weak radiation resistance, etc.
Since the selection range of inorganic glass components is very large, and each component can be continuously changed within a certain range, the interaction of different functional oxides in the glass can realize the detection of γ-rays, fast neutrons, medium-energy neutrons and slow neutrons. Comprehensive protection against neutron radiation, but no inorganic transparent glass capable of simultaneously shielding gamma rays and neutrons (including fast, medium energy and slow neutrons) has been found

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0017] A kind of radiation shielding glass, its chemical composition content is: SiO 2 : 10%, PbO: 35%, Al 2 o 3 : 20%, B 2 o 3 : 10%, Li 2 O: 5%, In 2 o 3 : 10%, Gd 2 o 3 : 10%, CeO 2 : 0.5%.

[0018] The dosage unit of each component in the above compounds is in mass percent.

[0019] The preparation method of the above-mentioned radiation shielding glass is as follows, and the process steps are: (1) Weigh the raw materials according to the proportion, raise the temperature to 950~1100°C, add the materials in several times, and then raise the temperature to 1100~1250°C for The raw material melts. During the melting process of glass raw materials, stir regularly to homogenize the melt, and the clarification temperature is about 100°C higher than the temperature of the chemical material; (2) After completing the glass material, homogenization and clarification, cool down the glass liquid to 950~1100 ℃, the mold temperature is controlled between 460~550℃, and the gl...

Embodiment example 2

[0021] A kind of radiation shielding glass, its chemical composition content is: SiO 2 : 20%, PbO: 45%, Al 2 o 3 : 15%, In 2 o 3 : 10%, Dy 2 o 3 : 10%, CeO 2 : 0.2%.

[0022] The dosage unit of each component in the above compounds is in mass percent.

[0023] The preparation method of the above-mentioned radiation shielding glass is as follows: (1) Weigh the raw materials according to the proportion, raise the temperature to 950~1100°C and add the ingredients in several times, and then raise the temperature to 1200~1300°C to melt the raw materials; glass raw materials During the melting process, stir regularly to homogenize the melt, and the clarification temperature is about 100°C higher than the temperature of the material; (2) After the glass material, homogenization and clarification are completed, the temperature of the molten glass is cooled to 950°C~1200°C In between, the mold temperature is controlled between 500~650°C, and the glass melt is directly poured in...

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Abstract

The invention provides a radiation shielding glass, which is represented by mass percentage and whose chemical composition is SiO 2 : 10~30%, PbO: 25~60%, Al 2 o 3 : 0~20%, B 2 o 3 : 0~20%, Li 2 O: 0~20%, Re 2 o 3 (Re=Gd, Eu, Dy): 0~15%, In 2 o 3 : 0~15%, CeO 2 : 0~1.5%, and provide a preparation method of shielding glass with the same composition, the gamma ray absorption coefficient of the shielding glass is 0.5cm ‑1 (0.511MeV) and 0.3cm ‑1 (1.25MeV), the visible light transmittance is greater than 80% when the thickness is 6mm, and the shielding rates of slow, medium energy and fast neutrons are above 97%, 40% and 20% respectively, which can be used for gamma rays and medium neutrons in the nuclear industry. Shielding windows (plates) for neutron radiation, epithermal neutron radiation fields for medical use or gamma rays for PET inspection.

Description

technical field [0001] The invention relates to a radiation shielding glass and a preparation method thereof, in particular to a protective glass for gamma ray and neutron radiation shielding, the radiation shielding glass is suitable for gamma ray and (or) neutron radiation shielding windows or Shield shield. Background technique [0002] Nuclear materials are the basis of nuclear technology. With the continuous development of science and technology, nuclear technology is widely used in the fields of national defense, medicine and scientific research. However, no matter in the field of nuclear material preparation or in the application of nuclear technology, various nuclear radiation such as γ-ray and neutron radiation have great radiation hazards to human body, equipment, environment, etc., and have aroused great concern in the field of international radiation protection. . Therefore, good radiation shielding for various radiation is an important guarantee for the applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/072C03C3/07C03C4/08
CPCC03C3/072C03C3/07C03C4/08
Inventor 郭永解范大恩杭利军隋宁菠
Owner 北京玻璃研究院有限公司
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