CN102141182B - Heat insulation material capable of insulating heat and neutrons - Google Patents
Heat insulation material capable of insulating heat and neutrons Download PDFInfo
- Publication number
- CN102141182B CN102141182B CN201010102240A CN201010102240A CN102141182B CN 102141182 B CN102141182 B CN 102141182B CN 201010102240 A CN201010102240 A CN 201010102240A CN 201010102240 A CN201010102240 A CN 201010102240A CN 102141182 B CN102141182 B CN 102141182B
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- China
- Prior art keywords
- heat
- thermal insulating
- insulating material
- neutron
- foam
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Abstract
The invention belongs to a heat shield and insulation material. The heat insulation material is prepared into a composite foam asbestos material by adding 5 to 20 weight percent of Gd2O3 or Er2O3 powder serving as a neutron absorber into a foam asbestos base material. The composite foam asbestos material has extremely high heat shield and insulation properties and neutron absorbability, is a heat insulation material capable of insulating heat and neutrons and is particularly suitable for heat shield and heat insulation of thermal power equipment and a pipeline of a nuclear reactor system.
Description
Technical field
The invention belongs to a kind of thermal insulating material, be specifically related to a kind of heat-insulation and heat-preservation material.
Background technique
Need the parcel thermal insulating material on the high-temperature pipe of nuclear reactor system, valve and the steaming plant.Thermal insulating material not only requires excellent heat-shielding performance, also must anti-irradiation, and ageing-resistant, pipeline base metal material is not had corrosion, and can at high temperature use for a long time and performance deterioration not.
The thermal-protective material of nuclear reactor heat distribution pipeline system generally adopts the super glass wool based article.Though super glass wool has heat-insulating property preferably, in use there are some problems, inconvenient like the construction of super glass wool; The wrapping of glass wool is difficulty very, and glass wool is prone to crisp, produces dust during extruding; The serious harm workmen's is healthy; And be difficult to reuse, produce a large amount of rubbish during replacing, befouling environment.
Foam asbestus has good flexibility and rebound elasticity, and is nonhygroscopic, aging, is to use heat distribution pipeline such as the best naval vessel of performance, aircraft, vehicle and heat power equipment to use thermal-protective material.The long-term serviceability temperature of foam asbestus can be more than 500 ℃, and its heat conductivity factor is low to moderate below the 0.06W/mk, and density is less than 0.05g/cm
3Its comprehensive usability is best in present all thermal-protective materials.Compare with the super glass wool thermal insulating material, the distinguishing feature of foam asbestus is: (1) is in light weight, and is under same condition, lighter by 1/5 than super glass wool; (2) have good flexibility and rebound elasticity, can be fit to difform pipeline, valve and equipment, can in installation and maintenance process, reply original shape again, thereby keep heat-shielding performance constant through trampling or push the back; (3) process heat-insulating profile, can cut out, be easy to install, free from environmental pollution, do not produce dust, chafe not, easy to maintenance and clean, can online on-call maintenance.But have and to wrap up at a distance from the thermal insulating material of neutron because some pipeline of nuclear reactor heat distribution pipeline system preferably adopts, and present foam asbestus does not have the neutron absorption function.
By retrieval, have the litaflex insulation material of neutron absorption function, have no report at present both at home and abroad.
Summary of the invention
The objective of the invention is to: provide a kind of and have the neutron absorption function, be particularly suitable for the nuclear power plant heat distribution pipeline can be heat insulation again can be at a distance from the thermal insulating material of neutron.
Technological scheme of the present invention is following:
A kind of can heat insulationly can it is characterized in that at a distance from the thermal insulating material of neutron again: in the foam asbestus base-material, add the Gd of medium grain size less than 0.5 μ m
2O
3Powder or Er
2O
3Powder is as neutron absorber, add this neutron absorber amount be the 5wt%～20wt% of thermal insulating material weight, become the composite foam asbestos material.
Said foam asbestus base-material serves as the group material with calcium stearate and French chalk, and talcous content is 9～24% of thermal insulating material weight.
Effect of the present invention is: compare with the thermal insulating material of background technique, thermal insulating material of the present invention not only has excellent heat insulation property, but also has the ability that intercepts neutron, is specially adapted to the heat-insulation and heat-preservation of nuclear reactor system heat power equipment and pipeline; The pipe insulation section bar that adopts thermal insulating material of the present invention to make can be repeatedly used, and convenient construction does not only produce the dust of befouling environment again, and with low cost.
Embodiment
Thermal insulating material of the present invention is to be in the foam asbestus of base-material with calcium stearate and French chalk, adds the Gd of medium grain size less than 0.5 μ m
2O
3Powder or Er
2O
3Powder is as neutron absorber, and to adjust talcous content be 9～24% of thermal insulating material weight, becomes the composite foam asbestos material with intercept neutrons function, and its density can reach 0.05g/cm
3Below, heat conductivity factor can be low to moderate below the 0.06W/mk.
Below, in conjunction with embodiment the present invention is further described:
Embodiment 1
With calcium stearate and the French chalk basic filler as foam asbestus, adding medium grain size is the Gd of 0.5 μ m
2O
3Powder.Talcous content is 24% of thermal insulating material weight, Gd
2O
3Content be 5% of thermal insulating material weight, the density of the composite foam asbestos material of gained is less than 0.05g/cm
3, heat conductivity factor is less than 0.06W/mk.
Embodiment 2
As the basic filler of foam asbestus, add the Gd that medium grain size is 0.5 μ m with calcium stearate and French chalk again
2O
3Powder.Talcous content is 9% of thermal insulating material weight, Gd
2O
3Content be 20% of thermal insulating material weight, the density of the composite foam asbestos material of gained is less than 0.05g/cm
3, heat conductivity factor is less than 0.06W/mk.
Embodiment 3
As the basic filler of foam asbestus, add the Gd that medium grain size is 0.5 μ m with calcium stearate and French chalk again
2O
3Powder.Talcous content is 17% of thermal insulating material weight, Gd
2O
3Content be 12% of thermal insulating material weight, the density of the composite foam asbestos material of gained is less than 0.05g/cm
3, heat conductivity factor is less than 0.06W/mk.
Embodiment 4
As the basic filler of foam asbestus, add the Er that medium grain size is 0.5 μ m with calcium stearate and French chalk again
2O
3Powder.Talcous content is 17% of thermal insulating material weight, Er
2O
3The content of powder is 12% of thermal insulating material weight, and the density of the composite foam asbestos material of gained is less than 0.05g/cm
3, heat conductivity factor is less than 0.06W/mk.
The present invention is through adding Gd in foam asbestus
2O
3Or Er
2O
3Filler makes the composite foam asbestos material not only have good heat preservation and insulation, and has good neutron absorbability, and the neutron absorbability are with Gd
2O
3Or Er
2O
3The increase of content and increasing.
Claims (1)
1. one kind can heat insulationly can is characterized in that at a distance from the thermal insulating material of neutron again: in the foam asbestus base-material, add the Gd of medium grain size less than 0.5 μ m
2O
3Powder or Er
2O
3Powder is as neutron absorber, add this neutron absorber amount be the 5wt%～20wt% of thermal insulating material weight, become the composite foam asbestos material; Said foam asbestus base-material serves as the group material with calcium stearate and French chalk, and its talcous content is 9～24% of thermal insulating material weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102240A CN102141182B (en) | 2010-01-28 | 2010-01-28 | Heat insulation material capable of insulating heat and neutrons |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010102240A CN102141182B (en) | 2010-01-28 | 2010-01-28 | Heat insulation material capable of insulating heat and neutrons |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102141182A CN102141182A (en) | 2011-08-03 |
| CN102141182B true CN102141182B (en) | 2012-10-17 |
Family
ID=44408881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010102240A Expired - Fee Related CN102141182B (en) | 2010-01-28 | 2010-01-28 | Heat insulation material capable of insulating heat and neutrons |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102141182B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030938A (en) * | 2010-10-27 | 2011-04-27 | 李勇 | Foamed neutron absorber material |
| CN102995389B (en) * | 2012-12-11 | 2014-10-22 | 武汉纺织大学 | Method for acquiring neutron protective fabric by doping rare earth element |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041872A (en) * | 1971-09-10 | 1977-08-16 | The United States Of America As Represented By The Secretary Of The Army | Wrapper, structural shielding device |
| US4303553A (en) * | 1978-09-28 | 1981-12-01 | Nippon Asbestos Co., Ltd. | Neutron-protection heat insulating material |
-
2010
- 2010-01-28 CN CN201010102240A patent/CN102141182B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041872A (en) * | 1971-09-10 | 1977-08-16 | The United States Of America As Represented By The Secretary Of The Army | Wrapper, structural shielding device |
| US4303553A (en) * | 1978-09-28 | 1981-12-01 | Nippon Asbestos Co., Ltd. | Neutron-protection heat insulating material |
Non-Patent Citations (1)
| Title |
|---|
| JP昭54-16098 1979.02.06 |
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| Publication number | Publication date |
|---|---|
| CN102141182A (en) | 2011-08-03 |
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