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Special protective glass

A kind of protective glass and special technology, applied in the field of special protective glass, can solve the problem that the protection efficiency of neutron flow does not meet the requirements and so on

Active Publication Date: 2015-09-23
CDGM GLASS LLC
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Problems solved by technology

[0003] In recent years, anti-neutron glass has been used as a protective product for military, civil, scientific research, etc., and some basic research work on anti-neutron glass has been carried out, and some anti-neutron glass products have been developed, but these glasses can only be used for protection against low-energy neutrons, but the protection efficiency against thermal neutrons or neutron flow with a large dose is far below the requirements

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Embodiment Construction

[0018] According to the foregoing definition, the reasons for constituting the range of each component of the special protective glass of the present invention are as follows:

[0019] SiO 2 As a glass generator, it is a skeleton formed by glass, but if the content is too large, it will increase the difficulty of melting and clarifying. Therefore, its content is 20.0-50.0%, preferably 35.0-45.0%.

[0020] PbO has good energy absorption characteristics, good shielding effect on X-rays and γ-rays, and is easy to cast. It has been widely used for many years, but too much content will cause large data fluctuations and poor chemical stability. Therefore, its content is 5-20.0%, preferably 8.0-15.0%.

[0021] B 2 O 3 It is an excellent absorbent for thermal neutrons, with high neutron capture cross-section, wide absorption energy spectrum and excellent corrosion resistance. Natural boron has two stable isotopes, namely 10 B and 11 B, the abundances are 19.87% and 80.22%, resp...

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Abstract

The invention provides special protective glass which can effectively protect thermal neutrons. The special protective glass comprises the following ingredients by weight percent: 20.0-50.0% of SiO2, 5.0-20.0% of PbO, 5.0-35.0% of B2O3, 3.0-12.5% of Na2O, 1.0-15.0% of Gd2O3, 5.0-30.0% of BaO and 2.0-10.0% of Li2O. Through reasonable proportioning of all the components and the component contents, the special protective glass with the 550 nm transmissibility of higher than 85%, the knoop harness of larger than 560*107 MPa, the neutron dose rate lowered to 50%, the thickness of smaller than 40 mm and the capability of effectively protecting thermal neutrons is obtained.

Description

technical field [0001] The invention relates to a special protective glass, in particular to a special protective glass that can effectively protect thermal neutrons. Background technique [0002] Special protective glass, namely radiation-proof glass and radiation-resistant glass, can block X-rays, gamma rays and neutrons, and are widely used in nuclear energy research peeping and protective windows, nuclear power plant peeping windows, and optical instrument panels in nuclear radiation environments. It plays an important role in the field of nuclear applications and is an indispensable optical glass material. In the past, only attention was paid to the protection of X-rays and γ-rays. With the increase of neutrons in scientific research, medical treatment, nuclear energy, etc., and the emergence of neutron guns, neutron protection materials have received attention. [0003] In recent years, anti-neutron glass has been used as a protective product for military, civil, scie...

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Application Information

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IPC IPC(8): C03C4/00C03C3/072C03C3/108
Inventor 苏学剑于天来莫大洪
Owner CDGM GLASS LLC
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