CN104409124A - High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material - Google Patents
High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material Download PDFInfo
- Publication number
- CN104409124A CN104409124A CN201410687195.1A CN201410687195A CN104409124A CN 104409124 A CN104409124 A CN 104409124A CN 201410687195 A CN201410687195 A CN 201410687195A CN 104409124 A CN104409124 A CN 104409124A
- Authority
- CN
- China
- Prior art keywords
- shielding material
- boron
- radiation
- temperature
- composite shielding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
- G21F1/103—Dispersions in organic carriers
- G21F1/106—Dispersions in organic carriers metallic dispersions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F1/00—Shielding characterised by the composition of the materials
- G21F1/02—Selection of uniform shielding materials
- G21F1/10—Organic substances; Dispersions in organic carriers
- G21F1/103—Dispersions in organic carriers
Abstract
The invention discloses a preparation method of a high-filling composite shielding material for radiation mixing fields. The preparation method comprises the following steps of: quantitatively weighing and uniformly mixing by taking hydrogen-rich thermoplastic resin as a base material, a boron-containing compound as a neutron absorber and metal lead as a gamma-ray absorber, and supplementing functional auxiliaries in a certain proportion; and performing processes such as sectional mould-pressing and sizing, sectional mould-pressing and molding, and the like under certain pressure and temperature field conditions. The preparation method is simple in preparation process and convenient to operate. The prepared high-filling composite shielding material for radiation mixing fields has a good outline state, no cracks, no shrinkage cavity and seam inside, uniform density, good material mechanical performances, and good shielding performances on neutrons and gamma-rays, is widely applied to neutron and gamma-ray ionization radiation protection and research field of places such as nuclear reactors, nuclear power plants, isotope radiation source devices, petroleum exploration well equipment, accelerators and isotope neutron sources.
Description
Art
The present invention relates to Shielding Materials for Nuclear Radiation preparing technical field, be specifically related to a kind of radiation mixing field high filled composite shielding material and preparation method.
Background technology
Along with the development of nuclear technology, various radiation source is widely used in the facilities such as nuclear reactor, nuclear power station, isotopic radiation source apparatus, oil prospect pit equipment, accelerator, isotope neutron source, in the ionising radiation that the nuclear facilities such as isotope source produce, the special radiation shield paid attention to the large gamma-rays of penetration power and neutron.Due to the quality of neutron and proton very close, based on elastic collision mechanism, the slowing down of material to neutron that hydrogen content is high has obvious effect; And boron, lithium, gadolinium and compound thereof are excellent neutron absorption agent; Absorb the same often along with the release of energy of neutron, produce gamma-rays, and heavy metals tungsten, lead, iridium, iron have very high shielding properties to gamma-rays, are desirable gamma ray shielding materials.Be matrix with rich hydrogen thermoplastic resin, preferably suitable neutron-absorbing material and heavy metal material, make shielding material, to meet the shielding request for utilization in nuclear radiation place by techniques such as blended, mold pressings.
For the nuclear radiation source that radiation intensity is larger, its shield assembly needs certain thickness guarantee instrument and equipment and the safety of operating personnel, and at present when designing shield assembly, the restriction of thickness is prepared based on polyolefin shielding material, method often through multiple-layer stacked meets shielding thickness requirement, but the shield effectiveness of heavy thickness integral material is better than multiple-layer stacked material, as thickness is better than multiple-layer stacked to the thick lead-boron polythene material of 250mm more than the shielding properties of the lead-boron polythene material of 250mm.For the equipment that some is special, the shield assembly of the equipment such as such as micro-heap collimating apparatus, neutron nondestructive test machine and neutron photography instrument, because contour structures is complicated, shielding protection requirement cannot be reached by the mode of multiple-layer stacked, the shielding material of integral thickness can only be adopted to make shield assembly.At present, the domestic research about super thick shielding material belongs to blank substantially, because it proposes very high requirement to moulding process, take thermoplastic resin as the large scale of base material, super thick material is easy to occur the defects such as internal shrinkage, external crack, density uniformity difference, job efficiency is very low.In addition, sometimes in order to make material have better shield effectiveness, need to add a large amount of neutron-absorbing materials and gamma-rays absorbing agent, adding proportion is even more than 60%, too high addition determines reduction greatly, the fluidity of molten variation of resin base material content in material, and these can bring the mechanical strength of material and processing and forming and have a strong impact on.
Current, in conjunction with the performance characteristics of radiation mixing field high filler loading capacity, super thick shielding material self, carry out neutron-absorbing material, the selecting and the research of adding proportion and material forming process of γ auxiliary agent, solve the defect that material exists, widen the application of shielding material, promote the overall technology of preparing level of nuclear defence, provide effective protection to greatest extent to human body radiation safety, developing radiation mixing field is the current vital task faced in this area with high filled composite shielding material.
Summary of the invention
The object of this invention is to provide the high filled composite shielding material of a kind of radiation mixing field, also provide its preparation method simultaneously.
In order to achieve the above object, the present invention is by the following technical solutions: the high filled composite shielding material of a kind of radiation mixing field, using rich hydrogen thermoplastic resin be base material, monomer boron or boron-containing compound be as neutron-absorbing material, metallic lead as gamma-rays absorbing agent, be aided with function additive, through quantitatively taking, evenly mixing, under certain pressure and temperature field condition, be prepared from by techniques such as mold pressing sizings, wherein, in shielding material, the content of each component is:
Rich hydrogen thermoplastic resin: 15-30%,
Monomer boron or boron-containing compound: 5-40%,
It is plumbous: 50-80%,
Function additive: 1-5%;
In above shielding material potpourri, each component concentration is weight percentage.
Rich hydrogen thermoplastic resin described above comprises: high density polyethylene, Low Density Polyethylene, polypropylene, ethylene-octene copolymer or its potpourri.
Monomer boron described above or boron-containing compound are: monomer boron powder, boron carbide or boron oxide.
Lead described above is: lead powder or lead button.
Function additive described above is: calcium stearate, antioxidant 1010, antioxidant 7910 or nano imvite.
The radiation mixing field preparation technology of high filled composite shielding material is:
(1) melt blending: quantitatively take rich hydrogen thermoplastic resin, monomer boron or boron compound and lead by proportioning, at 150-180 DEG C, first plasticate rich hydrogen thermoplastic resin 10-15min, then monomer boron or boron-containing compound and function additive is added, mixing 5-15min, finally add lead, more mixing 10-20min, the molten state material of mixing is put into shaper;
(2) the initial control temperature of mould: heated with mould by external device (ED), shaper initial temperature controls at 150-180 DEG C;
(3) mold pressing segmentation sizing: carry out precompressed 5-15min under 1-2MPa pressure, then slowly improves pressure to 5-15MPa, to ensure that fused materials is evenly distributed in mould, is slowly forced into 15-20Mpa again after pressurize 5-15min;
(4) forming pressure Discrete control: after pressure rises to 15-20Mpa, the forming pressure starting temperature-fall period controls, time before die temperature control system temperature drops to 120 ± 5 DEG C, system pressure is controlled between 15-20Mpa, then, when die temperature control system temperature is down near 120 DEG C, start nature step-down;
(5) forming temperature Discrete control: when forming pressure reaches predetermined value, start cooling with the speed of 1 DEG C/2h, when temperature reaches near 120 DEG C, cooling rate is that the speed of 2 DEG C/h continues to be cooled to depanning;
Depanning when die temperature control system temperature is down between 90-100 DEG C, makes radiation mixing field high filler loading capacity, super thick shielding material.
The present invention is based on neutron and gamma Rays protection theory, according to elastic collision energy loss mechanism, for being thermal neutron by Moderation of the fast neutrons, simultaneously in view of products thickness is comparatively large and filler is high, for ensureing that shielding material has the ductility that flows preferably, have better physical strength, selecting higher, the ductility of melting index better and having certain flexible rich hydrogen thermoplastic resin concurrently is base material.Shielding thermal neutron adopt absorption cross section large, capture the low material of γ photon energy, boron (10B) natural abundance is 20%, is easy to get, and therefore selects boron and compound thereof to be neutron-absorbing material, to ensure effectively to absorb thermal neutron, guarantee material neutron shield performance.Gamma-rays and matter interaction, by energy transferring to the bound electron in medium, incident particle itself disappears or is scattered, and from shield effectiveness, obtains source and material cost consideration, optimum gamma-rays absorbing agent is metallic lead, therefore selects plumbous as γ absorbing agent.Shielding material prepared by the present invention has the advantages that function of shielding additive level is high, thickness is large, because boron-containing compound and lead belong to inorganic filler, and rich hydrogen thermoplastic resin used is high-molecular organic material, between itself and inorganic filler, interfacial bonding property is poor, can affect the mechanical property of material; And on the other hand because products thickness is large, easily causes cooling velocity uneven in forming process and make material internal crystallinity difference produce internal stress, cause goods inside easily to form shrinkage cavity.And the technical program adopts the method for segmentation sizing, Discrete control pressure and temperature, improve the problem of interfacial bonding property difference between inorganic filler and high-molecular organic material, also the inner problem easily forming shrinkage cavity of goods is solved, both ensure that the packing of material, solve again the defective workmanship such as crackle, shrinkage cavity occurred in forming process.
The high filler loading capacity adopting technique scheme to prepare, super thick shielding material have good-looking, inner without hole, through performance test, high filler loading capacity, super thick shielding material good mechanical properties, material has good shielding properties for thermal neutron and gamma-rays, reaches goal of the invention.
Material property and testing apparatus information are in table 1 ~ table 3.
Table 1 material mechanical performance
| Sequence number | Test event | Performance index | Test result | Test execution standard |
| 1 | Density (g/cm 3) | 3.42±0.1 | 3.42 | GB/T 1033.1-2008 |
| 3 | Pulling strengrth (MPa) | ≥7.50 | 8.73 | GB/T 1040-2006 |
| 5 | Impact strength (kJ/m 2) | ≥4.00 | 4.75 | GB/T 1043.1-2008 |
| 6 | Bending strength (MPa) | ≥10.0 | 11.60 | GB/T 9341-2008 |
Table 2 material shielding performance
Table 3 testing apparatus is had a guide look of
Embodiment
Below in conjunction with specific embodiment, the invention will be further described:
Embodiment 1:
The high filled composite shielding material of a kind of radiation mixing field, using high density polyethylene L501 be base material, boron carbide is as neutron-absorbing material, lead powder as gamma-rays absorbing agent, be aided with antioxidant 1010, calcium stearate, through quantitatively taking, evenly mixing, under certain pressure and temperature field condition, be prepared from by techniques such as mold pressing sizings, wherein, in shielding material, each component is as follows:
The high filled composite shielding material of radiation mixing field, its each component concentration by weight percentage:
Its processing step is as follows:
(1) mixing
High density polyethylene L501, boron carbide and lead powder is quantitatively taken by proportioning, at 170 DEG C, first plasticate high density polyethylene 15min, then boron carbide, antioxidant 1010 and calcium stearate is added, mixing 10min, finally add lead powder, after continuing mixing 15-20min, the molten state material of mixing is put into shaper; (2) the initial control temperature of mould
Heated with mould by external device (ED), shaper initial temperature controls at 150-160 DEG C;
(3) mold pressing segmentation sizing
Under 1-2MPa pressure, carry out precompressed 5-15min, then slowly improve pressure to 5-15MPa, to ensure that fused materials is evenly distributed in mould, after pressurize 10-15min, be slowly forced into 15-20Mpa again;
(4) forming pressure Discrete control
After pressure rises to 15-20Mpa, the forming pressure starting temperature-fall period controls.Time before die temperature control system temperature drops to 120 ± 5 DEG C, system pressure is controlled between 15-20Mpa, then, when die temperature control system temperature is down near 120 DEG C, start nature step-down;
(5) forming temperature Discrete control
When forming pressure reaches predetermined value, start cooling with the speed of 1 DEG C/2h, when temperature reaches near 120 DEG C, cooling rate is that the speed of 2 DEG C/h continues to be cooled to depanning; Depanning when mold temperature is down to 95 DEG C, make length and width and be of a size of 1000mm × 900mm, thickness is radiation mixing field high filler loading capacity, the super thick shielding material of 280mm.
Embodiment 2:
The high filled composite shielding material of a kind of radiation mixing field, with polypropylene be base material, monomer boron as neutron-absorbing material, lead button as gamma-rays absorbing agent, be aided with antioxidant 7910, calcium stearate and nano imvite, through quantitatively taking, evenly mixing, under certain pressure and temperature field condition, be prepared from by techniques such as mold pressing sizings, wherein, in shielding material, each component is as follows:
The high filled composite shielding material of radiation mixing field, its each component concentration by weight percentage:
Its step of preparation process is identical with embodiment 1.
This is above is two specific embodiments that technical scheme according to the present invention provides, but protection scope of the present invention is not limited to embodiment described above.
Claims (6)
1. the high filled composite shielding material of radiation mixing field, using rich hydrogen thermoplastic resin be base material, monomer boron or boron-containing compound be as neutron-absorbing material, metallic lead as gamma-rays absorbing agent, be aided with function additive, through quantitatively taking, evenly mixing, under certain pressure and temperature field condition, be prepared from by techniques such as mold pressing sizings, wherein, in shielding material, the content of each component is:
Rich hydrogen thermoplastic resin: 15-30%,
Monomer boron or boron-containing compound: 5-40%,
It is plumbous: 50-80%,
Function additive: 1-5%;
In above shielding material potpourri, each component concentration is weight percentage.
2. the high filled composite shielding material of radiation mixing field according to claim 1, is characterized in that: described rich hydrogen thermoplastic resin comprises: high density polyethylene, Low Density Polyethylene, polypropylene, ethylene-octene copolymer or its potpourri.
3. the high filled composite shielding material of radiation mixing field according to claim 1, is characterized in that: described monomer boron or boron-containing compound are: monomer boron powder, boron carbide or boron oxide.
4. the high filled composite shielding material of radiation mixing field according to claim 1, is characterized in that: described metallic lead is: lead powder or lead button.
5. the high filled composite shielding material of radiation mixing field according to claim 1, is characterized in that: function additive described above is: calcium stearate, antioxidant 1010, antioxidant 7910 or nano imvite.
6. prepare radiation mixing field described in claim 1 as follows with the processing step of high filled composite shielding material:
A. melt blending: quantitatively take rich hydrogen thermoplastic resin, monomer boron or boron compound and lead by proportioning, at 150-180 DEG C, first plasticate rich hydrogen thermoplastic resin 10-15min, then monomer boron or boron-containing compound and function additive is added, mixing 5-15min, finally add lead, more mixing 10-20min, the molten state material of mixing is put into shaper;
B. the initial control temperature of mould: heated with mould by external device (ED), shaper initial temperature controls at 150-180 DEG C;
C. mold pressing segmentation sizing: carry out precompressed 5-15min under 1-2MPa pressure, then slowly improves pressure to 5-15MPa, to ensure that fused materials is evenly distributed in mould, is slowly forced into 15-20Mpa again after pressurize 5-15min;
D. forming pressure Discrete control: after pressure rises to 15-20Mpa, the forming pressure starting temperature-fall period controls, time before die temperature control system temperature drops to 120 ± 5 DEG C, system pressure is controlled between 15-20Mpa, then, when die temperature control system temperature is down near 120 DEG C, start nature step-down;
E. forming temperature Discrete control: when forming pressure reaches predetermined value, start cooling with the speed of 1 DEG C/2h, when temperature reaches near 120 DEG C, cooling rate is that the speed of 2 DEG C/h continues to be cooled to depanning;
Depanning when die temperature control system temperature is down between 90-100 DEG C, makes radiation mixing field high filler loading capacity, super thick shielding material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410687195.1A CN104409124A (en) | 2014-11-26 | 2014-11-26 | High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410687195.1A CN104409124A (en) | 2014-11-26 | 2014-11-26 | High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104409124A true CN104409124A (en) | 2015-03-11 |
Family
ID=52646744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410687195.1A Pending CN104409124A (en) | 2014-11-26 | 2014-11-26 | High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104409124A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816195A (en) * | 2017-02-27 | 2017-06-09 | 东北大学 | Gamma ray shielding material and preparation method thereof |
| CN107805777A (en) * | 2017-09-19 | 2018-03-16 | 昆明理工大学 | A kind of tungsten boron stratified material with ray and neutron comprehensive shielding effect |
| CN108164783A (en) * | 2017-12-06 | 2018-06-15 | 安徽应流久源核能新材料科技有限公司 | A kind of preparation method of high lead tolerance lead-boron polythene plate |
| CN108276646A (en) * | 2018-02-06 | 2018-07-13 | 中国船舶重工集团公司第七〇九研究所 | A kind of proportioning type composite shielding material and preparation method thereof with neutron and the comprehensive shielded effects of γ |
| CN109118947A (en) * | 2018-07-20 | 2019-01-01 | 四川理工学院 | The method that one-pass molding makes the nucleopore false-proof film of target security pattern |
| CN110951135A (en) * | 2019-09-04 | 2020-04-03 | 陈淑萍 | Preparation method of thin-wall high-performance lead-boron-polyethylene composite nuclear shielding material |
| CN112002453A (en) * | 2020-09-07 | 2020-11-27 | 成都赐进金属材料有限公司 | Anti-radiation composite ball and preparation method thereof |
| CN113201180A (en) * | 2021-05-13 | 2021-08-03 | 中国科学院合肥物质科学研究院 | Neutron and gamma ray composite shielding material and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693767A (en) * | 2012-05-21 | 2012-09-26 | 北京富迪创业科技有限公司 | Ultra-thin neutron radiation preventive composite shielding material and preparation method thereof |
| CN103183861A (en) * | 2013-03-21 | 2013-07-03 | 中国船舶重工集团公司第七一九研究所 | Composite shielding material with neutorn-gamma comprehensive shielding effect |
| CN104103330A (en) * | 2014-04-04 | 2014-10-15 | 西安交通大学 | Nuclear radiation shielding material |
| CN104130546A (en) * | 2014-04-04 | 2014-11-05 | 西安交通大学 | Preparation method for nuclear radiation shielding material |
-
2014
- 2014-11-26 CN CN201410687195.1A patent/CN104409124A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693767A (en) * | 2012-05-21 | 2012-09-26 | 北京富迪创业科技有限公司 | Ultra-thin neutron radiation preventive composite shielding material and preparation method thereof |
| CN103183861A (en) * | 2013-03-21 | 2013-07-03 | 中国船舶重工集团公司第七一九研究所 | Composite shielding material with neutorn-gamma comprehensive shielding effect |
| CN104103330A (en) * | 2014-04-04 | 2014-10-15 | 西安交通大学 | Nuclear radiation shielding material |
| CN104130546A (en) * | 2014-04-04 | 2014-11-05 | 西安交通大学 | Preparation method for nuclear radiation shielding material |
Non-Patent Citations (2)
| Title |
|---|
| 吕继新等: "高效能屏蔽材料铅硼聚乙烯", 《核动力工程》 * |
| 衷斌等: "用于n-γ混合屏蔽的复合材料性能", 《清华大学学报》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106816195A (en) * | 2017-02-27 | 2017-06-09 | 东北大学 | Gamma ray shielding material and preparation method thereof |
| CN106816195B (en) * | 2017-02-27 | 2019-03-12 | 东北大学 | Gamma ray shielding material and preparation method thereof |
| CN107805777A (en) * | 2017-09-19 | 2018-03-16 | 昆明理工大学 | A kind of tungsten boron stratified material with ray and neutron comprehensive shielding effect |
| CN108164783A (en) * | 2017-12-06 | 2018-06-15 | 安徽应流久源核能新材料科技有限公司 | A kind of preparation method of high lead tolerance lead-boron polythene plate |
| CN108276646A (en) * | 2018-02-06 | 2018-07-13 | 中国船舶重工集团公司第七〇九研究所 | A kind of proportioning type composite shielding material and preparation method thereof with neutron and the comprehensive shielded effects of γ |
| CN109118947A (en) * | 2018-07-20 | 2019-01-01 | 四川理工学院 | The method that one-pass molding makes the nucleopore false-proof film of target security pattern |
| CN110951135A (en) * | 2019-09-04 | 2020-04-03 | 陈淑萍 | Preparation method of thin-wall high-performance lead-boron-polyethylene composite nuclear shielding material |
| CN112002453A (en) * | 2020-09-07 | 2020-11-27 | 成都赐进金属材料有限公司 | Anti-radiation composite ball and preparation method thereof |
| CN113201180A (en) * | 2021-05-13 | 2021-08-03 | 中国科学院合肥物质科学研究院 | Neutron and gamma ray composite shielding material and preparation method thereof |
| CN113201180B (en) * | 2021-05-13 | 2024-03-01 | 中国科学院合肥物质科学研究院 | Neutron and gamma ray composite shielding material and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104409124A (en) | High-filling composite shielding material for radiation mixing fields and preparation method of high-filling composite shielding material | |
| Wang et al. | Design, fabrication, and properties of a continuous carbon-fiber reinforced Sm2O3/polyimide gamma ray/neutron shielding material | |
| CN103045916B (en) | Composite shielding material and preparation method thereof | |
| Adeli et al. | Neutron irradiation tests on B4C/epoxy composite for neutron shielding application and the parameters assay | |
| CN103183861A (en) | Composite shielding material with neutorn-gamma comprehensive shielding effect | |
| CN104228268B (en) | The polymer-based neutron-absorbing screen of gradient type material and preparation method thereof | |
| CN102693767B (en) | Preparation method for ultra-thin neutron radiation preventive composite shielding material | |
| CN105803267A (en) | Aluminium-based composite material used for nuclear reactors to shield neutrons and gamma rays as well as preparation method thereof | |
| CN110867265B (en) | Flexible neutron radiation protection material and preparation method of protection article | |
| CN107910088A (en) | A kind of rare-earth-based flexible core radiation protection material and its preparation method and application | |
| CN105200274A (en) | Neutron absorbing material and preparation method thereof | |
| Fu et al. | The advancement of neutron shielding materials for the storage of spent nuclear fuel | |
| CN106317784A (en) | Multifunctional epoxy resin radical radiation protective compound material and preparation method thereof | |
| CN106280501A (en) | A kind of neutron shield composite with foam metal as matrix and preparation method thereof | |
| CN103183928A (en) | High-temperature resisting shielding material with neutron shielding effect | |
| CN104292609A (en) | Heat-resistant composite shielding material and preparation method thereof | |
| CN110619969A (en) | Radiation shielding container and preparation method thereof | |
| Jing et al. | Research progress of rare earth composite shielding materials | |
| CN102867557B (en) | A kind of preparation method of boron nitride-polyethylenespace space radiation protection compound substance | |
| Mehelli et al. | Outstanding thermal neutrons shields based on epoxy, UHMWPE fibers and boron carbide particles | |
| Zhang et al. | Compact shielding design of a portable 241Am–Be source | |
| CN104103330A (en) | Nuclear radiation shielding material | |
| RU2016131402A (en) | METHOD FOR PRODUCING RADIOACTIVE ISOTOPES IN A NUCLEAR REACTOR AT FAST NEUTRONS | |
| CN108084665A (en) | A kind of epoxy resin-matrix neutron shielding material and preparation method thereof | |
| CN109411103A (en) | One heavy metal species-rare earth nano composite shielding material and its preparation method and application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150311 |
|
| WD01 | Invention patent application deemed withdrawn after publication |