CN1266709C - Radiation-proof shading material and preparing method thereof - Google Patents
Radiation-proof shading material and preparing method thereof Download PDFInfo
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- CN1266709C CN1266709C CN 200410025043 CN200410025043A CN1266709C CN 1266709 C CN1266709 C CN 1266709C CN 200410025043 CN200410025043 CN 200410025043 CN 200410025043 A CN200410025043 A CN 200410025043A CN 1266709 C CN1266709 C CN 1266709C
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- radiation
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- radioresistance
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Abstract
The present invention relates to radiation-proof shading material and a preparing method thereof. The preparing method is used for the technical field of composite material preparation. The radiation-proof shading material of the present invention uses Pb, Ba, TiO2, TiB2 as radiation-proof strengthening phases, and constituent weight percentage is that 2 to 10% of Pb, 1 to 5% of Ba, 5 to 15% of TiO2, and 1 to 10% of TiB2, and the rest is aluminum. Firstly, the aluminum is smelted under smelting temperature; then, the Pb, Ba, TiO2, TiB2 radiation-proof strengthening phases are respectively added. By controlling cooling speed and utilizing a distribution mode of electromagnetic field for the radiation-proof strengthening phases in a fused mass to control, the Pb, Ba, TiO2, TiB2 radiation-proof strengthening phases distributed in a solidification structure to form a material gradient structure. Thus, composite material with radiation-proof self gradient is obtained. The composite material with radiation-proof self gradient of the present invention can effectively reduce the radiation damage of a spacecraft because of high energy charged particle bombardment at outer space, and can also effectively protect electronic components in the spacecraft from outside and mutually interfering. The present invention can also be popularized to other fields.
Description
Technical field
The present invention relates to a kind of compound substance and preparation method thereof, particularly a kind of anti-radiation shield material and preparation method thereof.Be used for the Composite Preparation field.
Background technology
Be full of the electromagnetic radiation of various high energy charged particles and each wave band in the working environment of electron devices such as spacecrafts such as guided missile, satellite, aircraft and warship, as high energy proton, electronics, neutron, ion and radiowave, microwave, χ ray, gamma-rays etc., they can bring serious radiation damage and electromagnetic interference (EMI) to electron device, are the major incentive of spacecraft fault and inefficacy.Make semiconductor devices SiO as high energy charged particles by effects of ionizing radiation
2Electronics-hole in the insulation course causes the threshold voltage shift of MOS transistor, bipolar transistor gain to descend to increasing; Generation makes microelectronic component logic state single event upset that changes and the single event latchup that makes cmos component generation controlled silicon effect; High energy particle passes through when having the high index of refraction optical material also can produce the Qie Lunkefu radiation effect, makes background the bright spot that should not have etc. occur.
By literature search, N.C.Das, people such as D.Khastgir are in the article of Composites partA:appliedscience and manufacturing magazine 2000 the 31st curly hair table " Electromagneticinference shielding effectiveness of carbon black and carbon fibra EVAand NR based composites " compound substance ", the electromagnetic interference shield effect of carbon black, carbon fiber ethylene vinyl acetate and natural rubber based composites) ".The preparation technology and the shield effectiveness of three kinds of shielding material carbon blacks, carbon fiber ethylene vinyl acetate and natural rubber based composites that this article is introduced.Its complex technical process, seriously polluted, though the compound substance for preparing has certain shield effectiveness to the X ray of 100-2000MHz and 8-12GHz, but mechanical property is not high, and because these materials under actinism, have instability, takes place crosslinked, the generation catabiosis, also be unfavorable for environmental protection, thereby be difficult to be applied to the environment for use of spacecraft and the protection of electronic instrument.And the space flight instrument requires used material to have very high mechanical property, high temperature resistant and cryogenic property and ageing resistance because its special environment for use, thus above-mentioned material to be used on the space flight instrument be inappropriate.
Summary of the invention
The present invention is directed to the deficiencies in the prior art and defective, a kind of anti-radiation shield material and preparation method thereof is provided, make its material of preparing can improve space shielding property and electromagnetic shielding action, particularly shield outer space high-energy ray.
The present invention is achieved by the following technical solutions, and anti-radiation shield material of the present invention is a matrix with aluminium, with Pb, Ba, TiO
2, TiB
2As the radioresistance hardening constituent, the percentage by weight of its component: Pb 2～10%, Ba 1～5%, TiO
25～15%, TiB
21～10%, surplus is an aluminium.
Anti-radiation shield preparation methods of the present invention is: at first under smelting temperature aluminium is melted, add Pb, Ba, TiO then respectively
2, TiB
2The radioresistance hardening constituent by controlling cooling velocity and utilizing electromagnetic field that the distribution mode of radioresistance hardening constituent in the melt is controlled, distributes it in solidified structure, form the gradient-structure of material, thereby obtains the compound substance of radioresistance gradient self-generating.
The matrix that the present invention adopts is the fine aluminium base, and concrete technological parameter is: smelting temperature is 750 ℃～1100 ℃; The addition scope of the radioresistance hardening constituent that adopts: Pb 2～10%, and Ba 1～5%, TiO
25～15%, TiB
21～10%; The cooling velocity scope that adopts: 5～30 degree/seconds; The electromagnetic field frequency scope that adopts is: 0～20kHz.
The present invention has substantive distinguishing features and obvious improvement; the spontaneous composite gradient material of its radioresistance can effectively reduce spacecraft is subjected to the high energy charged particles bombardment at the outer space radiation injury; can also effectively protect electronic devices and components are subjected in the spacecraft outside and interference each other; but also can be generalized to other field, for example: carrier rocket, spaceship, guided missile, aircraft and warship etc.Aspect civilian, can be used to prevent that vitals such as computer chip, integrated circuit are subjected to having very wide application prospect and application value in army such as the electromagnetism of generations such as ELECTROMAGNETIC BOMB, sunspot and the destruction of radiation.
Embodiment
The effect that technology of the present invention obtains material is: (1) material mechanical performance: the density of compound substance near or be a bit larger tham aluminium; (2) shield effectiveness: its radioresistance index is as shown in the table:
| The ray type | The χ ray | Gamma-rays | α, β ray | Neutron ray |
| Shielding rate (%) | 20％ | 10％ | Reach standard | 10％ |
Below in conjunction with specific embodiment the present invention is done further understanding:
Embodiment 1:
The percentage by weight of anti-radiation shield material component: Pb 10%, Ba 1%, TiO
210%, TiB
21%, surplus is a fine aluminium.
Fine aluminium is being melted for 750 ℃, adding Pb 10%, Ba 1%, TiO
210%, TiB
21% radioresistance hardening constituent, melt are incubated to 750 ℃, at 5 degree/seconds of cooling velocity, electromagnetic frequency are to be shaped under the condition of 7kHz.This kind gradient composites has good anti-high-energy ray effect, and gamma ray shielding is reached 8.0%, and the x alpha ray shield reaches 9.2%, and α and β ray can reach standard, and the shielding of neutron ray reaches 7%, and density is 5.7%.
Embodiment 2:
The percentage by weight of anti-radiation shield material component: Pb 6%, Ba 3%, TiO
25%, TiB
28%, surplus is a fine aluminium.
Fine aluminium is being melted for 850 ℃, is adding alloying element, join the LY12 alloy melt, add Pb 6%, Ba 3%, TiO
25%, TiB
28% radioresistance hardening constituent, melt are incubated to 850 ℃, at 10 degree/seconds of cooling velocity, electromagnetic frequency are to be shaped under the condition of 10kHz.This kind gradient composites has good anti-high-energy ray effect, and gamma ray shielding is reached 9.4%, and the χ alpha ray shield reaches 12.6%, and α and β ray can reach standard, and the shielding of neutron ray reaches 8.8%, and density is 4.3%.
Embodiment 3:
The percentage by weight of anti-radiation shield material component: Pb 2%, Ba 5%, TiO
215%, TiB
210%, surplus is a fine aluminium.
Fine aluminium is being melted for 1000 ℃, adding Pb 2%, Ba 5%, TiO
215%, TiB
210% radioresistance hardening constituent, melt are incubated to 1100 ℃, at 30 degree/seconds of cooling velocity, electromagnetic frequency are: be shaped under the condition of 16kHz.This kind gradient composites has good anti-high-energy ray effect, and gamma ray shielding is reached 9.8%, and the χ alpha ray shield reaches 16.7%, and α and β ray can reach standard, and the shielding of neutron ray reaches 9.1%, and density is 4.8%.
Claims (3)
1, a kind of anti-radiation shield material is characterized in that, is matrix with aluminium, with Pb, Ba, TiO
2, TiB
2As the radioresistance hardening constituent, the percentage by weight of its component: Pb 2～10%, Ba 1～5%, TiO
25～15%, TiB
21～10%, surplus is an aluminium.
2, a kind of anti-radiation shield preparation methods is characterized in that, described anti-radiation shield material is to be matrix with aluminium, with Pb, Ba, TiO
2, TiB
2As the radioresistance hardening constituent, the percentage by weight of its component: Pb 2～10%, Ba 1～5%, TiO
25～15%, TiB
21～1O%, surplus is an aluminium, at first under smelting temperature aluminium is melted, and adds Pb, Ba, TiO then respectively
2, TiB
2The radioresistance hardening constituent, by controlling cooling velocity and utilizing electromagnetic field that the distribution mode of radioresistance hardening constituent in the melt is controlled, cooling velocity scope: 5～30 degree/seconds, the electromagnetic field frequency scope is: O～20kHz, it is distributed in solidified structure, form the gradient-structure of material, thereby obtain the compound substance of radioresistance gradient self-generating.
3, anti-radiation shield preparation methods according to claim 2 is characterized in that, smelting temperature is 750 ℃～1100 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410025043 CN1266709C (en) | 2004-06-10 | 2004-06-10 | Radiation-proof shading material and preparing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410025043 CN1266709C (en) | 2004-06-10 | 2004-06-10 | Radiation-proof shading material and preparing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1585037A CN1585037A (en) | 2005-02-23 |
| CN1266709C true CN1266709C (en) | 2006-07-26 |
Family
ID=34601116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410025043 Expired - Fee Related CN1266709C (en) | 2004-06-10 | 2004-06-10 | Radiation-proof shading material and preparing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1266709C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102011033B (en) * | 2010-12-24 | 2012-01-18 | 哈尔滨工业大学 | Method for preparing aluminum-based gradient composite material under action of traveling wave magnetic field |
| CN106128537B (en) * | 2016-07-29 | 2019-01-08 | 何天泽 | A kind of radiation protection red copper stereotype |
-
2004
- 2004-06-10 CN CN 200410025043 patent/CN1266709C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1585037A (en) | 2005-02-23 |
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Granted publication date: 20060726 Termination date: 20120610 |