CN105482225A - Nuclear radiation prevention rare earth composite material and preparation method thereof - Google Patents
Nuclear radiation prevention rare earth composite material and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
Abstract
The invention relates to a nuclear radiation prevention rare earth composite material which is prepared from, by weight, 20-80% of an inorganic material, 10-60% of a rare earth compound, 5-50% of macromolecule resin and 0.9-2.0% of an additive. Compared with the prior art, the nuclear radiation prevention rare earth composite material has a good mechanical property, waterproof performance and construction performance, is low in weight, free of toxin and convenient to process and has a good shielding effect on gamma rays and neutron rays.
Description
Technical field
The invention belongs to technical field of nuclear radiation protection, be specifically related to a kind of nucleus screening RE polymer composite and preparation method thereof.
Background technology
Along with the fast development of nuclear technique related industries, high-energy radiation ray has been widely used in multiple fields such as industry, medical treatment, scientific research, the radiation safety brought thus and protection question also more and more important.Primary protection is to liking X-ray, gamma-rays and neutron, especially gamma-rays and neutron radiation, and its penetration power is strong, and it is improper to protect, and can bring grave danger to personnel and equipment.Heavy element or there is the element of large absorption cross section can in order to slow down fast neutron absorb secondary gamma ray; The hydrogen atom of high-content can block intermediate neutrons, and does not produce gamma-rays quadratic effect.So the material for shielding gamma-rays and neutron current normally contains the element of heavy element and large absorption cross section, as lead, tungsten, iron, barium etc.; And containing the crystal water of sufficient amount or protium as superpolymer such as water, paraffin, polyethylene, polypropylene, polystyrene, polyester.
Nuclear radiation protection material shielding material used, except requiring that it has except excellent barrier propterty, also requires that material has superior stability and certain mechanical property under radiation parameter.The neutron ray that the places such as current nuclear reactor, nuclear tests room, nuclear fuel factory use shields and mostly is Boron-containing-PE, containing boron resin, paraffin, leaded loaded concrete, aluminum boride or norbide, wherein the most widely used is leaded loaded concrete and Boron-containing-PE.Mostly these materials are because Boron contents is high or protium content is high and have excellent radiation shielding performance, but hardness is all larger and snappiness and repeatedly bending are bad, can not well paste this instrument and pipeline when neutron shield is carried out to irregular instrument or pipeline, and it is larger to take up room.Meanwhile, Pb has good receptivity to energy higher than the ray between 88keV and 13 ~ 40keV; But exist in one " the weak absorbing district of Pb " the ray of energy between 40 ~ 88keV, weak effect and poisonous is covered to neutron absorbing screen; Boron neutron absorption performance is successively decreased.In addition, the making processes of these shielding materials is also very complicated.
Chinese patent CN102030938A discloses a kind of Foamed neutron absorber material, the mixture of following massfraction is obtained Foamed neutron absorber material through foam process: neutron-absorbing material 10 ~ 60% and body material 40 ~ 90%, described neutron-absorbing material be in norbide, ferrite, rare earth compound, lithium hydride, paraffin one or more.Described body material is cement or high molecular polymer or both mixing.First, obtain the Foamed neutron absorber material hole a large amount of because internal structure contains through foam process, the intensity of material can be affected, effectively can not block fast neutron; Secondly, the selected ageing resistance of foam material such as urethane, methacrylic resin own is strong, especially at anti-neutron radiation aspect of performance, has concurrently at the neutron radiation function of shielding of material and structure-integrated being difficult to.
Summary of the invention
Object of the present invention be exactly provide that a kind of radiation screening effect is good, snappiness is good, tensile strength is high to overcome defect that above-mentioned prior art exists, light weight, the nontoxic and novel anti-nuclear radiation material of consistency of performance, be applicable to the nuclear radiation shield of rule or irregular equipment and can be used in making the nuclear radiation material of vest.
Object of the present invention can be achieved through the following technical solutions:
A kind of anti-nuclear radiation rare earth composite material, is made up of the component of following weight percent content:
Described inorganic materials is selected from one or more in the P052.5 silicate cement of high grade, 200 ~ 400 object silica powders, ground barium sulfate, brown ocher or norbide.
Rare earth element in described rare-earth compound is selected from the multiple of lanthanum, gadolinium, samarium, europium or dysprosium.
Described rare-earth compound be selected from the title complex of the oxide compound of rare earth element, the oxalate of rare earth element, the carbonate of rare earth element or rare earth element one or more.
Described macromolecule resin comprises polyethylene, polypropylene, polystyrene, polycarbonate or polyester.
Described admixture is (1 ~ 5) by silane coupling agent, stearic acid and softening agent in mass ratio: (1 ~ 10): (1 ~ 10) forms.
Described softening agent comprises dioctyl phthalate (DOP), dimixo-octyl phthalate or Di Iso Decyl Phthalate.
A preparation method for anti-nuclear radiation rare earth composite material, comprises the following steps:
(1) inorganic materials, rare-earth compound, admixture are mixed by proportioning, then add the emulsion containing macromolecule resin, stir and obtain mixture;
(2) mixture is constructed, after drying, obtain anti-nuclear radiation rare earth composite material.
The described emulsion containing macromolecule resin is non-ionic type emulsion, and in emulsion, the mass content of macromolecule resin is 40 ~ 80%.
Preferably, in described emulsion, the mass content of macromolecule resin is 50 ~ 80%.
The present invention utilizes rare earth element, and especially samarium, europium, gadolinium, dysprosium have very large neutron-absorption cross-section and good capture thermal neutron effect; And the superpolymer such as paraffin, polyethylene, polypropylene, polystyrene, polyester contains the protium of sufficient amount and the feature of easily machine-shaping, has invented a kind of light weight, nontoxic, physical properties is excellent, nuclear radiation shield is effective and the novel anti-nuclear radiation material of consistency of performance.
Rare earth element is samarium, europium, gadolinium, dysprosium etc. especially, and their neutron-absorption cross-section is very large, has good thermal neutron effect of capturing; Introduce hydrogeneous many high polymer materials such as polyethylene, polypropylene, polystyrene, polyester, these materials have good radiation resistance, have the hydrogen atom that can block intermediate neutrons of high-content simultaneously, and do not produce gamma-rays quadratic effect.In addition, because the present invention is inorganic/organic composite material, higher compactness is had, therefore have excellent ageing-resistant performance, excellent water permeability resistance and splitting resistance, make topic state matrix material and have combination of rigidity and flexibility, to solve in the neutron radiation function of shielding of material and the structure-integrated difficult problem being difficult to have concurrently.The present invention adopts and add macromolecule resin emulsion in the inorganic materials such as silicate cement, 200 ~ 400 object silica powders, ground barium sulfate, brown ocher or norbide, that machine-shaping is convenient on the one hand, make matrix material have nuclear radiation shield performance, mechanical property, water resistance and workability on the other hand, and there is the advantages such as cracking resistance, corrosion-resistant and density distribution uniformity, range of application is more extensive.
Compared with prior art, the present invention has following beneficial effect:
Meet national standard requirement, there is good nuclear radiation shield performance, mechanical property, water resistance and workability, and there is the advantages such as cracking resistance, corrosion-resistant and density distribution uniformity.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail, can be easier to be readily appreciated by one skilled in the art, thus make more explicit defining to protection scope of the present invention to make advantages and features of the invention.
Embodiment 1
A kind of anti-nuclear radiation rare earth composite material, is made up of the component of following weight percent:
Take mineral filler, rare earth compound and admixture respectively by massfraction, mix, then add nonionic polyethylene emulsion, stir.
Embodiment 2
The matrix material of the present embodiment is obtained by the component of following weight percent content:
Take mineral filler, rare earth compound and admixture respectively by massfraction, mix, then add nonionic polycarbonate emulsion, stir.Obtain described anti-nuclear radiation RE polymer composite.
Table 1 is the rare earth anti-nuclear radiation polymer composite of embodiment 1 preparation and the neutron ray shielding properties of common PE (without rare earth).
Table 1
Embodiment 3
A kind of anti-nuclear radiation rare earth composite material, is made up of the component of following weight percent:
Take mineral filler, rare earth compound and admixture respectively by massfraction, mix, then add the non-ionic emulsion of high density polyethylene(HDPE) according to proportioning, stir, construction, dry, obtain described anti-nuclear radiation RE polymer composite.
Embodiment 4
Take mineral filler, rare earth compound and admixture respectively by massfraction, mix, then add the non-ionic emulsion of polycarbonate according to proportioning, stir, construction, dry, obtain described anti-nuclear radiation RE polymer composite.
Embodiment 5
A kind of anti-nuclear radiation rare earth composite material, is made up of the component of following weight percent:
Take mineral filler, rare earth compound and admixture respectively by massfraction, mix, then add polyacrylic non-ionic emulsion according to proportioning, stir, construction, dry, obtain described anti-nuclear radiation RE polymer composite.
Embodiment 6
The present embodiment is substantially the same manner as Example 1, and difference is that macromolecule resin is polystyrene.
Embodiment 7
The present embodiment is substantially the same manner as Example 1, and difference is that macromolecule resin is polyester.
Embodiment 8
The present embodiment is substantially the same manner as Example 1, and difference is, the softening agent in the present embodiment is dimixo-octyl phthalate.
Embodiment 9
The present embodiment is substantially the same manner as Example 1, and difference is, the softening agent in the present embodiment is Di Iso Decyl Phthalate.
Embodiment 10
The present embodiment is substantially the same manner as Example 1, and difference is that the mass content of the admixture in the present embodiment is 2%, and the silane coupling agent in admixture, stearic acid and softening agent are 1:10:1 composition in mass ratio.
Embodiment 11
The present embodiment is substantially the same manner as Example 1, and difference is that the mass content of the admixture in the present embodiment is 2%, and the silane coupling agent in admixture, stearic acid and softening agent are 5:1:10 composition in mass ratio.
Embodiment 12
The present embodiment is substantially the same manner as Example 1, and the rare-earth compound that difference is in the present embodiment is the carbonate of lanthanum, gadolinium and samarium.
Embodiment 13
The present embodiment is substantially the same manner as Example 1, and the rare-earth compound that difference is in the present embodiment is the oxalate of samarium, europium and dysprosium.
The above; be only one of the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (10)
1. an anti-nuclear radiation rare earth composite material, is characterized in that, is made up of the component of following weight percent content:
2. a kind of anti-nuclear radiation rare earth composite material according to claim 1, it is characterized in that, described inorganic materials is selected from one or more in the P052.5 silicate cement of high grade, 200 ~ 400 object silica powders, ground barium sulfate, brown ocher or norbide.
3. a kind of rare earth anti-nuclear radiation mortar according to claim 1, it is characterized in that, the rare earth element in described rare-earth compound is selected from the multiple of lanthanum, gadolinium, samarium, europium or dysprosium.
4. a kind of anti-nuclear radiation rare earth composite material according to claim 3, it is characterized in that, described rare-earth compound be selected from the title complex of the oxide compound of rare earth element, the oxalate of rare earth element, the carbonate of rare earth element or rare earth element one or more.
5. a kind of anti-nuclear radiation rare earth composite material according to claim 1, it is characterized in that, described macromolecule resin comprises polyethylene, polypropylene, polystyrene, polycarbonate or polyester.
6. a kind of anti-nuclear radiation rare earth composite material according to claim 1, it is characterized in that, described admixture is (1 ~ 5) by silane coupling agent, stearic acid and softening agent in mass ratio: (1 ~ 10): (1 ~ 10) forms.
7. a kind of anti-nuclear radiation rare earth composite material according to claim 6, it is characterized in that, described softening agent comprises dioctyl phthalate (DOP), dimixo-octyl phthalate or Di Iso Decyl Phthalate.
8. the preparation method of a kind of anti-nuclear radiation rare earth composite material as described in as arbitrary in claim 1 ~ 7, is characterized in that, comprise the following steps:
(1) inorganic materials, rare-earth compound, admixture are mixed by proportioning, then add the emulsion containing macromolecule resin, stir and obtain mixture;
(2) mixture is constructed, after drying, obtain anti-nuclear radiation rare earth composite material.
9. the preparation method of a kind of anti-nuclear radiation rare earth composite material according to claim 8, is characterized in that, the described emulsion containing macromolecule resin is non-ionic type emulsion, and in emulsion, the mass content of macromolecule resin is 40 ~ 80%.
10. the preparation method of a kind of anti-nuclear radiation rare earth composite material according to claim 8, is characterized in that, in described emulsion, the mass content of macromolecule resin is 50 ~ 80%.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007500A (en) * | 2016-05-18 | 2016-10-12 | 益阳金宙建材科技有限公司 | Rigid-flexible protecting mortar for nuclear power plants |
| CN106057260A (en) * | 2016-03-21 | 2016-10-26 | 宁夏乐嘉天瑜科技发展有限公司 | Highly-efficient X-ray radiation protection rubber composite material based on polymetallic composite compound |
| CN106750820A (en) * | 2017-01-12 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of low-density neutron shielding material and preparation method thereof |
| CN107573569A (en) * | 2017-10-27 | 2018-01-12 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of high-performance shielding neutron gamma radiation |
| CN107722425A (en) * | 2017-10-27 | 2018-02-23 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of the radiation of high-intensity shielding neutron gamma |
| CN107910088A (en) * | 2017-10-12 | 2018-04-13 | 上海师范大学 | A kind of rare-earth-based flexible core radiation protection material and its preparation method and application |
| CN108198640A (en) * | 2018-01-29 | 2018-06-22 | 洛阳市琦安科技有限公司 | The material and application method that radioactive pollutant is controlled to suspend or migrate under low temperature |
| CN108511096A (en) * | 2018-03-29 | 2018-09-07 | 广州新莱福磁电有限公司 | A kind of lightweight radiation protection material |
| CN108976795A (en) * | 2018-05-31 | 2018-12-11 | 四川大学 | A kind of polyarylphosphorus ether radiation protection composite material and preparation method thereof |
| CN109817361A (en) * | 2019-01-23 | 2019-05-28 | 北京镭硼科技有限责任公司 | A kind of neutron shielding material and preparation method thereof of high fire-retardance low volatility |
| CN110498962A (en) * | 2019-08-27 | 2019-11-26 | 上海龙洲新型建材有限公司 | A kind of radiation protection rare earth composite material and its technique is filled in type |
| CN113121977A (en) * | 2021-04-15 | 2021-07-16 | 湖北科技学院 | High-light-transmittance neutron shielding composite material and preparation method thereof |
| CN113214558A (en) * | 2021-06-04 | 2021-08-06 | 中国核动力研究设计院 | High-use-temperature accident-condition-resistant anti-irradiation material and preparation method thereof |
| CN113838589A (en) * | 2021-10-15 | 2021-12-24 | 四川长晏科技有限公司 | Inorganic radiation protection material and preparation method and application thereof |
| CN113912341A (en) * | 2021-09-23 | 2022-01-11 | 中国核电工程有限公司 | Concrete material for neutron absorption and shielding and preparation method thereof |
| CN114835492A (en) * | 2022-05-18 | 2022-08-02 | 厦门稀土材料研究所 | Rare earth-based zirconium-hafnium composite ceramic material and preparation method and application thereof |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106057260A (en) * | 2016-03-21 | 2016-10-26 | 宁夏乐嘉天瑜科技发展有限公司 | Highly-efficient X-ray radiation protection rubber composite material based on polymetallic composite compound |
| CN106057260B (en) * | 2016-03-21 | 2017-12-05 | 宁夏乐嘉新材料有限公司 | A kind of powerful X-ray radiation protection rubber composite based on more metal composite compounds |
| CN106007500A (en) * | 2016-05-18 | 2016-10-12 | 益阳金宙建材科技有限公司 | Rigid-flexible protecting mortar for nuclear power plants |
| CN106007500B (en) * | 2016-05-18 | 2017-11-14 | 益阳金宙建材科技有限公司 | A kind of hard and soft protection mortar for nuclear power station |
| CN106750820A (en) * | 2017-01-12 | 2017-05-31 | 中国工程物理研究院核物理与化学研究所 | A kind of low-density neutron shielding material and preparation method thereof |
| CN107910088A (en) * | 2017-10-12 | 2018-04-13 | 上海师范大学 | A kind of rare-earth-based flexible core radiation protection material and its preparation method and application |
| CN107573569A (en) * | 2017-10-27 | 2018-01-12 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of high-performance shielding neutron gamma radiation |
| CN107722425A (en) * | 2017-10-27 | 2018-02-23 | 镇江奥特氟科技有限公司 | A kind of composite particulate material and radiant panel of the radiation of high-intensity shielding neutron gamma |
| CN108198640A (en) * | 2018-01-29 | 2018-06-22 | 洛阳市琦安科技有限公司 | The material and application method that radioactive pollutant is controlled to suspend or migrate under low temperature |
| CN108511096A (en) * | 2018-03-29 | 2018-09-07 | 广州新莱福磁电有限公司 | A kind of lightweight radiation protection material |
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| CN113912341A (en) * | 2021-09-23 | 2022-01-11 | 中国核电工程有限公司 | Concrete material for neutron absorption and shielding and preparation method thereof |
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