CN2042992U - Superconducting characteristic demonstrating device - Google Patents
Superconducting characteristic demonstrating device Download PDFInfo
- Publication number
- CN2042992U CN2042992U CN 88217817 CN88217817U CN2042992U CN 2042992 U CN2042992 U CN 2042992U CN 88217817 CN88217817 CN 88217817 CN 88217817 U CN88217817 U CN 88217817U CN 2042992 U CN2042992 U CN 2042992U
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- superconductor
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- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Abstract
The utility model discloses a superconducting characteristic demonstrating device, belonging to the device of the application superconductivity. The superconducting characteristic demonstrating device comprises cryogenic medium, a container, a superconductive conductor, a permanent magnet, and an electric resistance measuring device. The utility model is characterized in that when the oxidate high temperature superconductor is used, the superconducting diamagnetism and the zero resistance can be demonstrated only by using liquid N-[2] medium. Transparent dewar is used as the container of the liquid N-[2], so the occurrence of frost on the surface of the container is avoided. The utility model has the advantages of simple device, low cost, and clear and visual demonstration. The superconducting characteristic demonstrating device can be used as demonstration teaching aid and popular science teaching aid. A plurality of physical phenomenon and principles relating to superconductivity can be explained when the demonstration is conducted.
Description
The utility model is the superconducting characteristic apparatus for demonstrating, belongs to the device of using supraconductivity.
For a long time, the demonstration of supraconductivity is subjected to the restriction of cryogenic conditions, can not particularly carry out scientific popularization in the adolescent student in various circles of society.Along with over nearly 2 years, the discovery of oxide high-temperature supraconductivity makes superconducting transition temperature reach liquid N
2Warm area, this has not only occurred at liquid N
2Warm area is used the possibility of superconductor technology, also be to various circles of society, the universal superconduction knowledge of adolescent student particularly, intuitively Jie's superconducting characteristic convenience is provided.
Zero resistance and diamagnetism are two separate characteristics of superconductor.In general, demonstrate this characteristic and need cryogenic media, specialized equipment and measuring method.In order to popularize superconduction knowledge, demonstrate or allow student oneself observation superconducting characteristic intuitively, apparatus should be simple as far as possible.Simultaneously, the container that holds cryogenic media should be transparent, so that the diamagnetism of the superconductor that is placed in one of Direct observation with the naked eye.Certainly, this container can use beaker or other transparent vessel, but when pouring into N
2After, the very fast meeting of these vessel surface frosting becomes opaque, makes and observes difficulty.
The purpose of this utility model is to provide simple, a practical superconducting characteristic apparatus for demonstrating, can clearly illustrate the diamagnetism and the zero resistance of superconductor, is convenient to teaching demonstration and scientific popularization, also can be for the student as physics facility.
The utility model is made up of cryogenic media and container thereof, superconductor, permanent magnet.In the time will showing the zero resistance characteristic, the resistance when available surveying instrument shows from room temperature to superconducting transition temperature reduces, up to zero resistance occurring.Of the present utility model being characterised in that used oxide high temperature superconductor, liquid N
2Cryogenic media and transparent liquid N
2Container, transparent liquid N
2Container is glass or quartzy vacuum Dewar bottle.Because the vacuum insulation of Dewar flask has been avoided liquid N
2Surperficial frosting after pouring into has guaranteed direct visual inspection.
The high-temperature oxide superconductor that the utility model uses can be the oxide that presents superconductivity more than any 77K.As Y-Ba-Cu-O system, Bi-Sr-Ca-Cu-O system, Tl-Ba-Ca-Cu-O system etc.Shape is generally disc, matches with the cross section with Dewar flask.
The permanent magnet that the utility model uses can be the permanent magnet of any high energy product, high-coercive force, as Nd-Fe-B system, Sm-Co system, Pt-Co system or Al-Ni-Co system etc.Shape is generally cylindrical.
Below by description of drawings embodiment of the present utility model.
1 is the glass Dewar flask among the figure, and 2 are high-temperature oxide superconductor, the 3rd, permanent magnet, the 4th, liquid N
2, the 5th, Cuo at the bottom of the Dewar flask.
The internal diameter of Dewar flask 1 is at 20-65mm, and the diameter of high-temperature oxide superconductor is slightly less than Dewar internal diameter also.For reducing cost, Dewar flask can adopt the glass proembryo that does not plate Ag of commercially available common thermos cup, but its internal diameter is bigger.At this moment, it is suitable with the high-temperature superconductor diameter that available nonmagnetic substance is made internal diameter, and external diameter is with the fixing high-temperature superconductor and place Dewar flask of the suitable annular fixed mount of thermos cup internal diameter.Oxide high temperature superconductor in the present embodiment adopts YBa
2Cu
3O
7, diameter 15-30mm, thickness 1.5-5mm can place multi-disc.Permanent magnet in the present embodiment uses the Nd-Fe-B right cylinder, long 6-8mm, and diameter 4-8mm is not partial to the Dewar flask inwall in order to make permanent magnet stably be suspended in top, superconductor middle part, and the upper surface of oxide superconductor can be made into bowl-shape.
Use said apparatus, when pouring into liquid N
2, oxide superconductor is in superconducting transition temperature when following, can observe the diamagnetism of superconductor significantly, and permanent magnet is suspended in the top of oxide superconductor.As observing the zero-resistance phenomenon of oxide superconductor, then can on oxide superconductor, make electrode, be connected on the resistance apparatus.Resistance in the time of can clearly observing oxide superconductor from room temperature to 77K reduces, up to zero resistance occurring.
Use this device, except that two fundamental characteristics can demonstrating superconductor intuitively, can also be used to say be situated between many physical knowledges and physical phenomenon.For example, can introduce the knowledge of superconductor, permanent magnetic material, be situated between and release the vacuum insulation phenomenon.When diamagnetism occurring, available non-magnetic object touches the permanent magnet that suspends, and permanent magnet can show magnetic suspension bearing (magnetic bearing) principle etc. around transverse axis or axis rotation perpendicular to the ground.Therefore, the utility model can be widely used as class demonstration teaching aid and scientific popularization teaching aid, some application principle of Jie's superconducting phenomenon that made numerous teenagers.
This device consumption liquid N2Per hour only about 1/3 liter, only about 0.70 yuan of required expense. Longer when the demonstration time, during the beginning frosting of Dewar bottle surface, only need with a little wiping of cotton ball soaked in alcohol, can recover transparent. Oxide superconductor is kept under the drying at room temperature environment after once demonstrating, and can repeatedly use in 3-6 month. Therefore, it is simple to the utlity model has device, and cost is low, demonstrates clear, advantage intuitively.
Claims (7)
1, the utility model is the superconducting characteristic apparatus for demonstrating, belongs to the device of using supraconductivity, and it is made up of cryogenic media and container, superconductor, permanent magnet and resistance apparatus, and of the present utility model being characterised in that used oxide superconductor, liquid N
2Cryogenic media and glass or quartzy vacuum Dewar bottle.
2,, it is characterized in that said oxide superconductor can be Y-Ba-Cu-O system, Bi-Sr-Ca-Cu-O system or Tl-Ba-Ca-Cu-O system by the described apparatus for demonstrating of claim 1.
3, by claim 1 or 2 described apparatus for demonstrating, it is characterized in that said oxide superconductor is YBa
2Cu
3O
7, diameter 15-30mm, thick 1.5-5mm.
4,, it is characterized in that said permanent magnet can be Nd-Fe-B system, Sm-Co system, Pt-Co system or Al-Ni-Co system by the described apparatus for demonstrating of claim 1.
5, by claim 1 or 4 described apparatus for demonstrating, it is characterized in that permanent magnet is the Nd-Fe-B right cylinder, be of a size of diameter 4-8mm, long 6-8mm.
6, by the described apparatus for demonstrating of claim 3, it is characterized in that the upper surface of said oxide superconductor is made bowl-shape.
7, by the described apparatus for demonstrating of claim 1, it is characterized in that said Dewar flask can adopt commercially available common thermos cup not plate the proembryo of Ag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217817 CN2042992U (en) | 1988-12-23 | 1988-12-23 | Superconducting characteristic demonstrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88217817 CN2042992U (en) | 1988-12-23 | 1988-12-23 | Superconducting characteristic demonstrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2042992U true CN2042992U (en) | 1989-08-16 |
Family
ID=4850325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88217817 Expired - Lifetime CN2042992U (en) | 1988-12-23 | 1988-12-23 | Superconducting characteristic demonstrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2042992U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426812A (en) * | 2011-11-15 | 2012-04-25 | 赵杰 | High-temperature superconducting comprehensive experiment instrument |
| CN102723025A (en) * | 2012-05-04 | 2012-10-10 | 北京英纳超导技术有限公司 | Teaching instrument for demonstrating superconducting characteristic |
| CN104634860A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Device and method for monitoring steel bar yield state in reinforced concrete bridge structure |
-
1988
- 1988-12-23 CN CN 88217817 patent/CN2042992U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102426812A (en) * | 2011-11-15 | 2012-04-25 | 赵杰 | High-temperature superconducting comprehensive experiment instrument |
| CN102426812B (en) * | 2011-11-15 | 2014-04-16 | 赵杰 | High-temperature superconducting comprehensive experiment instrument |
| CN102723025A (en) * | 2012-05-04 | 2012-10-10 | 北京英纳超导技术有限公司 | Teaching instrument for demonstrating superconducting characteristic |
| CN104634860A (en) * | 2015-02-10 | 2015-05-20 | 重庆交通大学 | Device and method for monitoring steel bar yield state in reinforced concrete bridge structure |
| CN104634860B (en) * | 2015-02-10 | 2017-10-03 | 重庆交通大学 | Reinforcement yielding state monitoring apparatus and method inside concrete bridge construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |