CN104926120B - Special type protection glass - Google Patents
Special type protection glass Download PDFInfo
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- CN104926120B CN104926120B CN201510319296.8A CN201510319296A CN104926120B CN 104926120 B CN104926120 B CN 104926120B CN 201510319296 A CN201510319296 A CN 201510319296A CN 104926120 B CN104926120 B CN 104926120B
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Abstract
The present invention provides a kind of special type protection glass that effective protection can be carried out to thermal neutron.Special type protection glass, its percentage by weight composition includes：SiO2：20.0 50.0%；PbO：5.0 20.0%；B2O3：5.0 35.0%；Na2O：3.0 12.5%；Gd2O3：1.0 15.0%；BaO：5.0 30.0%；Li2O：2.0 10.0%.The present invention has obtained 550nm transmitances and has been more than 560 × 10 more than 85%, Knoop hardness by reasonable disposition each component and its content7The thickness of glass of the present invention that MPa, neutron dose rate are down to 50% needs is less than 40mm, the special type protection glass of effective protection can be carried out to thermal neutron.
Description
Technical field
The present invention relates to a kind of special type protection glass, more particularly to a kind of special type that effective protection is carried out to thermal neutron is prevented
Shield glass.
Background technology
Special type protection glass, i.e. non-browning glass and radiation resistant glass, can play resistance to X-ray, gamma-rays and neutron
Every effect, be widely used in nuclear energy research spy on and protective window, nuclear power station hagioscope, nuclear radiation environment under optical instrument panel and
Various nuclear radiation environments such as camera lens, interplanetary probe protection face board, nuclear medicine protection, play an important role in core application field, are
A kind of indispensable optical glass material.Only paid attention to X-ray, gamma-ray protection in the past, as neutron is in scientific research, doctor
The aspects such as treatment, nuclear energy increase human injury, and neutron gun appearance, NEUTRON PROTECTION material just paid attention to.
In recent years, anti-neutron glass had been carried out some and had been prevented as the protection requirements product of military, civilian, scientific research etc.
Basic research work in terms of neutron glass, and some anti-neutron glass products are developed, but these glass can only be to low energy
Neutron is protected, and the protection efficiency of the neutron current larger to thermal neutron or dosage is not by far up to the mark.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of special type protection glass that effective protection can be carried out to thermal neutron
Glass.
The technical proposal for solving the technical problem of the invention is：Special type protection glass, its percentage by weight composition bag
Include：SiO2：20.0-50.0%；PbO：5.0-20.0%；B2O3：5.0-35.0%；Na2O：3.0-12.5%；Gd2O3：1.0-
15.0%；BaO：5.0-30.0%；Li2O：2.0-10.0%.
Further, also include：K2O：0-10.5%；CeO2：0-2.0%.
Further, wherein, K2O：2-6.5% and/or CeO2：0-1.0%.
Further, wherein, SiO2：35.0-45.0%.
Further, wherein, PbO：8.0-15.0%.
Further, wherein, B2O3：15.0-25.0%.
Further, wherein, Na2O：3.0-10.0%.
Further, wherein, Gd2O3：3.0-10.0%.
Further, wherein, BaO：10-20.0%.
Further, the 550nm transmitances of the glass are more than 85%.
Further, the Knoop hardness of the glass is more than 560 (× 107MPa)。
Further, the neutron dose rate of the glass be down to 50% thickness of glass of the present invention be less than 40mm.
The beneficial effects of the invention are as follows：The present invention has obtained 550nm transmitances by reasonable disposition each component and its content
It is more than 560 (× 10 more than 85%, Knoop hardness7MPa), neutron dose rate is down to the thickness of glass of the present invention of 50% needs and is less than
40mm, the special type protection glass that effective protection can be carried out to thermal neutron.
Specific embodiment
It is as follows the reasons why constitute each component scope of special type protection glass of the invention according to aforementioned definition：
SiO2It is the skeleton of glass formation as the generation body of glass, but if content is excessive, fusing clarification can be caused difficult
Degree increases.Therefore its content is 20.0-50.0%, preferably 35.0-45.0%.
PbO has good EAC, has preferable shield effectiveness to X-ray, gamma-rays, and easily cast, more
It is widely used always over year, but content is excessive, data fluctuations can be caused big, poor chemical stability.Therefore its content is 5-
20.0%, preferably 8.0-15.0%.
B2O3It is the excellent absorbent of thermal neutron, its neutron-capture cross section is high, it is excellent to absorb energy spectrum width, corrosion resistance.My god
Right boron element has two kinds of isotopes of stabilization, i.e.,10B and11B, abundance is respectively 19.87% and 80.22%,10B has to neutron
The uniqueness of high-selenium corn,10B is 3837 bars to the absorption cross section of thermal neutron, the absorption cross-section of the boron of natural abundance to thermal neutron
Accumulate close to 750 bars, and11B only has 0.005 bar.So in order to better, using10B substitutes the B in formula, but B2O3Content mistake
It is many, poor chemical stability can be caused.Therefore its content is 5.0-35.0%, preferably 15.0-25.0%.
Na2O is glass flux, can reduce the viscosity of glass, makes glass be easy to melt.But content is excessive, can cause
Poor chemical stability.Therefore its content is 3.0-12.5%, preferably 3.0-10.0%.
K2O can reduce the viscosity of glass, make glass be easy to melt, and can reduce the crystallization tendency of glass, increase glass
Transparency and gloss.But its content is excessive, can cause poor chemical stability.Therefore its content is 0-10.5%, preferably
2.0-6.5%.
Gd2O3As the oxide with high-selenium corn section, reached by the capture to slow neutron and thermal neutron and declined
Subtract, but content is excessive, the reduction of devitrification resistance ability.Therefore its content is 1.0-15.0%, preferably 3.0-10.0%.
CeO2It is good fining agent, contributes to bubble to eliminate, also with good radiation resistance, prevents glass in spoke
Devitrification under environment is penetrated, but content can excessively cause the reduction of glass transmitance.Therefore its content is 0-2.0%, preferably 0-
1.0%.
BaO can increase the chemical stability of glass, while BaO can also effectively reduce glass viscosity so that glass is in itself
Activity increase, as heavy metallic oxide, itself or preferable neutron absorber material, but if content is excessive, glass easily loses
Thoroughly.Therefore its content is 5.0-30.0%, preferably 10.0-20.0%.
Li2O can reduce the viscosity of glass, make glass be easy to melt, clarification, or excellent slow neutron absorbent.But
Its content is excessive, the devitrification resistance degradation of glass.Therefore its content is 2.0-10.0%.
The optical glass that the present invention is provided can be prepared as follows：By the raw material corresponding to the component of glass in proportion
Weigh, added in platinum crucible after being sufficiently mixed, lower the temperature after fusing, clarification, homogenizing at 1300-1500 DEG C；In 1100-1200
DEG C or so by melten glass be poured into preheating after metal die；The same metal of melten glass of the metal die that will be injected after preheating
Mould is put into Xu Leng in annealing furnace together, and NEUTRON PROTECTION glass is obtained after annealing, tests the relevant parameter of NEUTRON PROTECTION glass.
The performance and its method of testing of glass of the invention are as follows：
1) neutron dose rate is down to the thickness of glass of the present invention of 50% needs
By the cover plate of the invention of different-thickness by after the neutron source irradiation of 0.3MeV dosage, testing neutron dose
Rate is down to the thickness of glass of the present invention of 50% needs.
After tested, the thickness of glass of the present invention (mm) that neutron dose rate is down to 50% needs is 39-40mm.
2) 550nm transmitances (%) scope
Cover plate of the invention is processed into the thick samples of 10mm, transmitance is tested on spectrophotometer.
After tested, 550nm transmitances scope is 85-90%.
3) Knoop hardness (× 107MPa)
The sample surfaces of 20 × 20 × 20mm of the invention are polished, symmetrical corner angle is used for 172 ° 30 ' and 13 ° of corner
Cone diamond penetrator applies certain load and is vertically pressed on sample surfaces to it, after keeping certain hour, load is removed, with micro-
Sem observation simultaneously measures the length of impression long-diagonal on sample, and the projected area for conversing impression calculates K-hardness.
After tested, Knoop hardness scope is 560-570 (× 107MPa)。
4) softening point (DEG C)
Softening temperature (Ts) according to《GB/T7962.16-1987 colouless optical glass method of testings linear expansion coefficient, transformation
Temperature and sag temperature》Test, i.e.,：Within the scope of certain temperature, temperature often raises 1 DEG C to sample, in sample
On expansion curve, low-temperature region and high-temperature area straight line portion are extended intersecting, the temperature corresponding to its intersection point.
After tested, softening point range is 495-500 (DEG C).
The component and correspondence performance of the special type protection glass that embodiment 1~10 is provided are as shown in table 1, table 2.
Table 1
Table 2
Claims (11)
1. special type protection glass, it is characterised in that its percentage by weight composition includes：SiO2：20.0-50.0%；PbO：5.0-
20.0%；B2O3：5.0-35.0%；Na2O：3.0-12.5%；Gd2O3：1.0-15.0%；BaO：5.0-30.0%；Li2O：
2.0-10.0%.
2. special type protection glass as claimed in claim 1, it is characterised in that also include：K2O：0-10.5%；CeO2：0-
2.0%.
3. special type protection glass as claimed in claim 2, it is characterised in that wherein, K2O：2-6.5% and/or CeO2：0-
1.0%.
4. special type protection glass as claimed in claim 1, it is characterised in that wherein, SiO2：35.0-45.0%.
5. special type protection glass as claimed in claim 1, it is characterised in that wherein, PbO：8.0-15.0%.
6. special type protection glass as claimed in claim 1, it is characterised in that wherein, B2O3：15.0-25.0%.
7. special type protection glass as claimed in claim 1, it is characterised in that wherein, Na2O：3.0-10.0%.
8. special type protection glass as claimed in claim 1, it is characterised in that wherein, Gd2O3：3.0-10.0%.
9. special type protection glass as claimed in claim 1, it is characterised in that wherein, BaO：10-20.0%.
10. the special type protection glass as described in claim 1-9 any claims, it is characterised in that the 550nm of the glass
Transmitance is more than 85%.
The 11. special type protection glass as described in claim 1-9 any claims, it is characterised in that the neutron of the glass
Close rate is down to 50%, and required thickness of glass is less than 40mm.
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| CN201510319296.8A CN104926120B (en) | 2015-06-11 | 2015-06-11 | Special type protection glass |
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|---|---|---|---|
| CN201510319296.8A CN104926120B (en) | 2015-06-11 | 2015-06-11 | Special type protection glass |
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| CN104926120B true CN104926120B (en) | 2017-06-09 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107117809A (en) * | 2017-06-29 | 2017-09-01 | 合肥达户电线电缆科技有限公司 | A kind of monitoring device cover plate |
| CN107986620A (en) * | 2017-10-31 | 2018-05-04 | 芜湖辉灿电子科技有限公司 | A kind of mobile phone screen protective glass |
| CN108623146A (en) * | 2018-06-26 | 2018-10-09 | 成都光明光电有限责任公司 | Environmentally friendly special type protection glass |
| CN115611513A (en) * | 2022-10-28 | 2023-01-17 | 南京玻璃纤维研究设计院有限公司 | Radiation-resistant glass material and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287685A (en) * | 2005-10-19 | 2008-10-15 | 日本电气硝子株式会社 | Radiation shielding glass and method for manufacture thereof |
| CN102167511A (en) * | 2011-01-07 | 2011-08-31 | 湖州艾迪特琉璃工艺品有限公司 | Manufacturing method of low-energy radiation protective glass |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8207506B2 (en) * | 2007-07-03 | 2012-06-26 | Nova Scientific, Inc. | Neutron detection |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287685A (en) * | 2005-10-19 | 2008-10-15 | 日本电气硝子株式会社 | Radiation shielding glass and method for manufacture thereof |
| CN102167511A (en) * | 2011-01-07 | 2011-08-31 | 湖州艾迪特琉璃工艺品有限公司 | Manufacturing method of low-energy radiation protective glass |
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