CN2569535Y - Super conductive magnetic field shield room - Google Patents
Super conductive magnetic field shield room Download PDFInfo
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- CN2569535Y CN2569535Y CN 02246154 CN02246154U CN2569535Y CN 2569535 Y CN2569535 Y CN 2569535Y CN 02246154 CN02246154 CN 02246154 CN 02246154 U CN02246154 U CN 02246154U CN 2569535 Y CN2569535 Y CN 2569535Y
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- mgb
- magnetic
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- shielding chamber
- inwall
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Abstract
The utility model relates to a superconducting magnetic field shielding chamber, which comprises a hollow metal tube or a ceramic tube, and a top cover, wherein the inner wall of the ceramic tube is coated with a metal layer. The utility model is characterized in that the inner wall of the hollow metal tube or the inner wall of the ceramic tube which is coated with a metal layer on the inner wall is provided with a uniform and compact MgB#-< 2 > film, and an end cover of the tube is provided with the top cover which is made of the MgB#-< 2 >. The utility model adopts a two-step method to prepare a MgB#-< 2 > superconducting shielding chamber. The shielding chamber prepared in the method has the advantages of uniform and compact texture, strong electric and magnetic shielding performance, simple manufacturing process, rapid growth, low raw material cost and low equipment cost. The MgB#-< 2 > superconducting shielding chamber which is easy to grow is suitable for industrial production.
Description
Technical field
The utility model relates to superconducting shielding chamber preparation field, particularly relates to adopting electrophoretic techniques to prepare the magnesium diboride MgB that uses under the downfield
2Ultraconductive magnetic-field slveened room.
Background technology
Magnetic shielding system is to mask external magnetic noise, thereby in a particular space, form low magnetic even zero magnetic attitude, high-precision electromagnetism or organism are measured and research so that carry out, the main method of the shielding low frequency magnetic field that exists has material such as perm (Fe-Ni) alloy that utilizes high magnetic permeability now, or the perfect diamganetism of utilizing superconductor material is made, involve great expense when adopting the shielding of perm (Fe-Ni) alloy, bulky, shield effectiveness is relatively poor, and the leakage field phenomenon is serious, (document 1:Magnetic-field simulation forshielding from high magnetic fields, J.Appl.Phys, Vol 91,6991, and 2002).The superconductor shielding mainly contains two classes, traditional superconductor and high-temperature superconductor, and their shield effectiveness will be much better than permalloy.But traditional superconductor such as NbTi etc. can only use under downfield because its critical magnetic field is lower, as the earth magnetic field etc.High-temperature superconductor is representative with YBCO and Bi based material mainly, middle-size and small-size shielding harness is generally formed by the massive material machining of sintering, adding man-hour is that superconductivity and the uniformity that guarantees them need adopt some complicated technologies such as static pressure shaping, slow cool down etc., and these have all improved production cost greatly.Because it is single-phase that high temperature superconducting materia is difficult to form, and have serious weak connectivity problem, makes critical current density lower, thereby make them only be adapted at using under the downfield.As document 2: the magnetic shielding device of high-temperature superconductor, number of patent application .87216407; This patent adopts: 2 cylinders are sleeved on together with concentric manner, filled plastics or paper between the cylinder, and it is suitable for reading a top cover, and inner cylinder is made by superconductor, and a urceolus and a tube top cover are made by permeability magnetic material.The antimagnetic effect of this magnetic shielding device is relatively poor, and complex structure, and production cost is higher, can not satisfy practical needs.
Summary of the invention
The purpose of this utility model is to overcome existing shielding harness and involves great expense, and is bulky, and shield effectiveness is relatively poor, leakage field phenomenon important disadvantages, thus a kind of superconducting shielding chamber that can use under downfield is provided.
The purpose of this utility model is achieved in that
The Ultraconductive magnetic-field slveened room that the utility model provides comprises: a hollow metal tube or inwall are coated with the earthenware and the top cover of metal level; It is characterized in that: the earthenware inwall that is coated with metal level at described hollow metal tube or inwall has the MgB of an even compact
2Film is stamped at this pipe port and uses MgB
2The top cover of making.
Described MgB
2Magnesium diboride superconducting thin film thickness is: 0.5-70um;
The material requirements chemical property of described metal tube is stable, and high temperature is few and reactive magnesium down, comprising: iron, stainless steel, nickel, copper-nickel alloy etc.
The metal level of described earthenware inwall plating comprises: silver, aluminium, gold, copper, etc. the higher metal level of conductance, its thickness is more than 10 .
The superconducting shielding chamber that this downfield is used down is owing to adopt MgB
2As shielding material, and MgB
2The lower critical of material is about 4000e, the about 200nm of penetration depth, can reach 108-109 with the field decay of the shielded enclosure of this material preparation, simultaneously MgB
2The weak connection of crystal boundary is not obvious, obtains higher critical current density easily, thereby makes this shielding harness to use under higher magnetic field.
Deposition rate is very big when adopting electrophoresis to prepare film, so MgB
2The preparation of superconducting shielding chamber is rapider, and prepares bigger and uniform shielded enclosure easily, is fit to suitability for industrialized production.And the utility model technology is simple, and is cheap, and the Capability of Shielding Chamber of preparation is good, is suitability for industrialized production MgB
2The Perfected process of superconducting shielding chamber.
Advantage of the present utility model:
Be fully diamagnetic when 1, being in superconducting state, so the superconducting shielding chamber almost can shield the interference of external magnetic field fully in its critical magnetic field scope owing to superconductor.
2, MgB
2Have higher lower critical and less penetration depth, its preparation is simple, obtains single phase easily, and the weak connection of crystal boundary is not obvious, can reach higher current density, makes it to use under higher magnetic field, therefore is more suitable for doing shielding material.
Speed was fast and even when 3, electrophoresis deposited the magnesium diboride film, therefore can prepare the MgB of function admirable rapidly
2The superconducting shielding chamber is fit to suitability for industrialized production.
4. this method growth is rapid, technology is simple, with low cost, is suitable for suitability for industrialized production superconducting shielding chamber.
Description of drawings
Fig. 1 is that use tiselius apparatus of the present utility model prepares MgB
2Superconducting shielding chamber method schematic diagram
Fig. 2 is MgB of the present utility model
2The structural representation of superconducting shielding chamber
The drawing explanation:
1,4-top cover 2-tube wall 3-magnesium diboride film
5 positive electrode 6-belong to pipe 7-tiselius apparatus
8-high-voltage DC power supply 9-negative electrode
Specific embodiment
Embodiment 1: be equipped with MgB with cored iron control
2The superconducting shielding chamber
It is that 1 centimetre, height are that 3 centimetres, wall thickness are 0.3 centimetre hollow pure iron pipe 6 that present embodiment is got a diameter of section, wall deposits the thick magnesium diboride superconducting thin film 3 of the about 70um of one deck within it, and be stamped the top cover 1,4 that magnesium diboride is made in the two-port of described hollow pure iron pipe 6, so just made MgB
2The superconducting shielding chamber, as shown in Figure 1.
Embodiment 2:
It is that 2.3 centimetres, height are that 5 centimetres, wall thickness are 0.3 centimetre earthenware 6 that present embodiment is got a diameter of section, the thick silver layer of the inwall deposition about 30um of one deck; On its silver layer, deposit the thick magnesium diboride superconducting thin film 3 of the about 50um of one deck then, and be stamped the top cover 1,4 that magnesium diboride is made, so just made MgB in the two-port of this pipe 6
2The superconducting shielding chamber, as shown in Figure 1.
Embodiment 3: prepare MgB with hollow Al2O3 earthenware
2The superconducting shielding chamber
At the Al2O3 earthenware inwall thick copper of evaporation deposition one deck 10um in advance, all the other structures just obtain the MgB that Al2O3 earthenware inwall has the 10um thick copper layer with embodiment 1
2The superconducting shielding chamber.
Embodiment 4: be used in rustless steel container and replace quartz ampoule, all the other structures obtain the Fe outer wall, the shielded enclosure of superconduction inwall with embodiment 1.Such stainless steel tube can be reused.
Embodiment 5:
Describe structure of the present utility model in detail below in conjunction with the preparation method, use tiselius apparatus device shown in Figure 2, prepare MgB of the present utility model shown in Figure 1
2The superconducting shielding chamber, comprise six the step finish:
First: 56 milligrams of boron powder and 160 milliliters of acetone after will grinding fully mix (the two purity is 99.99%), and add 3 milligrams of pure iodine, and one plays in the tiselius apparatus, and makes its even mixing.
Second: with diameter of section is that 1 centimetre, height are that 3 centimetres, wall thickness are that the earthenware 6 that 0.3 centimetre hollow pure iron pipe or inwall are coated with the thick aluminum metal layer of 100 is cleaned with acetone, alcohol, deionized water respectively, insert then in the tiselius apparatus 7, be connected on the tube wall of metal tube anodal 5, negative pole 9 is for being positioned at earthenware 6 central authorities that hollow pure iron pipe or inwall are coated with metal level, and its negative pole 9 is the iron staff of 1 millimeter of diameter;
The 3rd: add the direct current 10 minutes of 1000V by DC power supply 8 on electrode, earthenware 6 inner surfaces that hollow pure iron pipe or inwall are coated with metal level just have the brown magnesium diboride film of one deck 80 micron thickness;
The 4th: the earthenware oven dry that the hollow pure iron pipe or the inwall of ready-made film is coated with metal level also is enclosed in the quartz ampoule that vacuumizes with 3 gram MAG blocks, and vacuum degree is lower than 10 handkerchiefs; It is too low to put into MAG block and be when preventing sintering the magnesium vapor pressure of pipe;
The the 5th: the quartz ampoule of sealing is placed on sintering in the ladle furnace.Furnace temperature slowly rises to 900 ℃ with per minute 12-15 ℃ speed, is incubated 50 minutes, reduces to room temperature then naturally;
The 6th: use two magnesium diboride superconducting flats of method for preparing, and be fixed in two ports of above-mentioned ready-made magnesium diboride superconducting pipe, magnesium diboride superconducting shielding chamber has just prepared like this;
The MgB that this method obtains
2But superconducting shielding chamber field decay 108-109, function admirable, and confirm that this method is simple, good reproducibility through test of many times.
Claims (4)
1. Ultraconductive magnetic-field slveened room, comprising: a hollow metal tube or inwall are coated with the earthenware and the top cover of metal level; It is characterized in that: the earthenware inwall that is coated with metal level at described hollow metal tube or inwall has the MgB of an even compact
2Film is stamped at this pipe port and uses MgB
2The top cover of making.
2. by the described Ultraconductive magnetic-field slveened room of claim 1, it is characterized in that: described MgB
2Film thickness is: 0.5-70um.
3. by the described Ultraconductive magnetic-field slveened room of claim 1, it is characterized in that: described metal tube comprises: iron, stainless steel, nickel or copper-nickel alloy material.
4. by the described Ultraconductive magnetic-field slveened room of claim 1, it is characterized in that: the metal level of described earthenware inwall plating comprises: the metal level that silver, aluminium, gold, copper or conductance are higher, its thickness is more than 10 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02246154 CN2569535Y (en) | 2002-09-17 | 2002-09-17 | Super conductive magnetic field shield room |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02246154 CN2569535Y (en) | 2002-09-17 | 2002-09-17 | Super conductive magnetic field shield room |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2569535Y true CN2569535Y (en) | 2003-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02246154 Expired - Fee Related CN2569535Y (en) | 2002-09-17 | 2002-09-17 | Super conductive magnetic field shield room |
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|---|---|
| CN (1) | CN2569535Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351111B (en) * | 2007-07-18 | 2010-09-29 | 北京固鸿科技有限公司 | Combined shielding house with leakage-proof structure |
| CN106102432A (en) * | 2016-08-01 | 2016-11-09 | 江苏工程职业技术学院 | The method of mobile screened room pre-control building intelligence system electromagnetism Leibo interference |
-
2002
- 2002-09-17 CN CN 02246154 patent/CN2569535Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101351111B (en) * | 2007-07-18 | 2010-09-29 | 北京固鸿科技有限公司 | Combined shielding house with leakage-proof structure |
| CN106102432A (en) * | 2016-08-01 | 2016-11-09 | 江苏工程职业技术学院 | The method of mobile screened room pre-control building intelligence system electromagnetism Leibo interference |
| CN106102432B (en) * | 2016-08-01 | 2018-08-03 | 江苏工程职业技术学院 | The method of fixed shielding room pre-control building intelligence system electromagnetism Leibo interference |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |