JPH02107786A - Formation of oxide superconducting film - Google Patents
Formation of oxide superconducting filmInfo
- Publication number
- JPH02107786A JPH02107786A JP63259840A JP25984088A JPH02107786A JP H02107786 A JPH02107786 A JP H02107786A JP 63259840 A JP63259840 A JP 63259840A JP 25984088 A JP25984088 A JP 25984088A JP H02107786 A JPH02107786 A JP H02107786A
- Authority
- JP
- Japan
- Prior art keywords
- base material
- oxide superconducting
- paint
- film
- superconducting film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000015572 biosynthetic process Effects 0.000 title claims 2
- 239000000463 material Substances 0.000 claims abstract description 46
- 239000003973 paint Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 238000009792 diffusion process Methods 0.000 abstract description 2
- 239000010955 niobium Substances 0.000 description 5
- 229910052758 niobium Inorganic materials 0.000 description 4
- 239000002887 superconductor Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は筒状の基材の内周面に酸化物超電導膜を形成さ
せる方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for forming an oxide superconducting film on the inner peripheral surface of a cylindrical base material.
例えばセラミック等の筒状の磁気シールド基材の内周面
に超電導膜を形成させて磁気シールドを製造する際、ニ
オブ（Ｎｂ）又は鉛（Ｐｂ）等をテープ状に加工したも
のを、前記基材の内周面に周着させた後、Ｎｂ、 Ｐｂ
等を超電導体にするための臨界温度まで冷却して前記基
材の内周面に超電導膜を形成させ、磁気シールドを得て
いた。For example, when manufacturing a magnetic shield by forming a superconducting film on the inner peripheral surface of a cylindrical magnetic shielding base material such as ceramic, a tape-shaped material such as niobium (Nb) or lead (Pb) is processed into a tape shape. After adhering to the inner peripheral surface of the material, Nb, Pb
A superconducting film was formed on the inner peripheral surface of the base material by cooling it to a critical temperature for making it a superconductor, thereby obtaining a magnetic shield.
しかしながら、Ｎｂ、 Ｐｂ等の前記臨界温度は極低温
なので、−２６９’Ｃの液体ヘリウムを冷媒として用い
なければならないため、ヘリウム（ｌｉｅ）を液化する
冷却コストが非常に多くかかるという問題があった。However, since the critical temperature of Nb, Pb, etc. is extremely low, liquid helium at -269'C must be used as a refrigerant, which poses a problem in that the cooling cost for liquefying helium (lie) is extremely high. .
そこで、臨界温度がＮｂ、 Ｐｂ等よりも高く、−１９
６°Ｃの液体窒素を冷媒として用いることができるＹ−
Ｂａ−Ｃｕ−０系等の酸化物超電導体を用いて膜を形成
させると、冷却コスト面での問題が解消される。Therefore, the critical temperature is higher than that of Nb, Pb, etc., and -19
Y- which can use liquid nitrogen at 6°C as a refrigerant
When a film is formed using an oxide superconductor such as Ba-Cu-0, the problem of cooling cost can be solved.
［発明が解決しようとする課題］
ところが、酸化物超電導体の膜を前記基材の内周面に形
成させる場合、従来方法のようにテープ状に加工して前
記内周面に周着させる方法をそのまま適用すると、膜に
割れ、歪み等が生じ易く、均一な膜が形成されず、成品
の品質が悪いという問題があった。[Problems to be Solved by the Invention] However, when forming an oxide superconductor film on the inner circumferential surface of the base material, it is difficult to process the film into a tape shape and wrap it around the inner circumferential surface, as in the conventional method. If applied as is, the film tends to crack, distort, etc., and a uniform film cannot be formed, resulting in poor quality of the product.
本発明は斯かる事情に鑑みてなされたものであり、筒状
の磁気シールド基材の内部に所要量の酸化物超電導塗料
を入れた後、前記基材をその長手方向を中心軸にして所
要の回転数で回転させるごとにより、遠心力で前記磁気
シールド基材の内周面に酸化物超電導膜を均一に形成さ
せ、成品の品質を向上させる酸化物超電導膜の形成方法
を提供することを目的とする。The present invention has been made in view of the above circumstances, and after putting a required amount of oxide superconducting paint inside a cylindrical magnetic shielding base material, the base material is moved as required with its longitudinal direction as the center axis. To provide a method for forming an oxide superconducting film, which uniformly forms an oxide superconducting film on the inner peripheral surface of the magnetic shielding base material by centrifugal force each time the magnetic shield base material is rotated at a rotational speed of , thereby improving the quality of the product. purpose.
上述の如き目的を達成するために、本発明に係る酸化物
超電導膜の形成方法は、筒状の基材に酸化物超電導膜を
形成させる方法において、前記基材内に所要量の酸化物
超電導塗料を入れ、該塗料を入れた基材をその長手方向
を中心軸にして所要の回転数で回転させることによって
、基材内周面に前記塗料による膜を形成させることを特
徴とする。In order to achieve the above objects, the method for forming an oxide superconducting film according to the present invention includes a method for forming an oxide superconducting film on a cylindrical base material, in which a required amount of oxide superconducting film is formed in the base material. The present invention is characterized in that a film of the paint is formed on the inner circumferential surface of the base material by putting the paint therein and rotating the base material containing the paint at a required rotational speed with its longitudinal direction as the central axis.
［作用］
酸化物超電導膜を形成させるべき筒状の磁気シールド基
材の内部に、所要量の酸化物超電導塗料を入れた後、前
記基材をその長手方向を中心軸にして所要の回転数で回
転させると、遠心力により前記塗料が前記基材内周面に
付着し酸化物超電導膜が形成される。[Function] After putting the required amount of oxide superconducting paint inside the cylindrical magnetic shielding base material on which the oxide superconducting film is to be formed, the base material is rotated at the required number of revolutions with its longitudinal direction as the central axis. When the base material is rotated, the paint adheres to the inner peripheral surface of the base material due to centrifugal force, and an oxide superconducting film is formed.
〔実施例］
第１図は本発明方法の実施例を説明するための横断面図
である。図中１は内径２０ｍｍ、外径２５ｍｍ、長さ６
０ＩｎＩ１１のアルミナセラミック製の円筒形の磁気シ
ールド基材であり、その底部及び上部は、底部に取り付
けられた底板２及び上部に取り付けられた上板３により
封止される。該上板３の中央部には直径１５皿のシーズ
ヒータ装入口を設けており、該装入口から直径１０ｍｍ
、長さ７０＋ｎｍ、出力２．５ｋＷ最大加熱温度１５０
°Ｃのシーズヒータ４が前記上板３及び前記磁気シール
ド基材１の内周面に接触しないように、磁気シールド基
材１の内部の長手方向の中心に装入され、固定される。[Example] FIG. 1 is a cross-sectional view for explaining an example of the method of the present invention. 1 in the diagram has an inner diameter of 20 mm, an outer diameter of 25 mm, and a length of 6
It is a cylindrical magnetic shielding base material made of 0InI11 alumina ceramic, and its bottom and top are sealed by a bottom plate 2 attached to the bottom and a top plate 3 attached to the top. A sheathed heater charging port with a diameter of 15 plates is provided in the center of the upper plate 3, and a diameter of 10 mm is provided from the charging port.
, length 70+nm, output 2.5kW, maximum heating temperature 150
°C sheathed heater 4 is inserted into the longitudinal center of the magnetic shield base material 1 and fixed so as not to contact the upper plate 3 and the inner circumferential surface of the magnetic shield base material 1.
また、シーズヒータ４装人側と対向する側の端部には回
転機のチャック５が取り付けられる。Furthermore, a chuck 5 of a rotating machine is attached to the end of the sheathed heater 4 on the side facing the installed person.
磁気シールド基材１の内部には次のようにして製造した
酸化物超電導塗料が注入される。即ち、Ｙ−Ｂａ−Ｃｕ
−０系の酸化物超電導体を９６０’Ｃの酸素雰囲気下で
３時間仮焼成し、メノウ乳鉢で粒形１０〜５０μｍに粉
砕する。粉砕した酸化物超電導粉１００部に対してエタ
ノール２００部を混合して粘度１００ｃｐｓ〜１ｏ００
ｃｐｓの塗料を得る。An oxide superconducting paint manufactured as follows is injected into the inside of the magnetic shielding base material 1. That is, Y-Ba-Cu
The -0-based oxide superconductor is pre-calcined in an oxygen atmosphere at 960'C for 3 hours, and then ground in an agate mortar to a particle size of 10 to 50 μm. Mix 200 parts of ethanol with 100 parts of pulverized oxide superconducting powder to obtain a viscosity of 100 cps to 1o00.
Get cps paint.
このようにして得られた酸化物超電導塗料を４１１ｉ気
シールド基材ｌの内部に１０〜２０ｃｃ注入し、前述の
如く封止する。その後前記チャ・ンク５を連結している
回転機（図示しない）を駆動させ、磁気シールド基材１
をその長手方向を中心軸にして回転数１２００ｒｐｍで
２時間回転させる。また、それと共にシーズヒータ４の
加熱温度を１３０°Ｃにする。そうすると、磁気シール
ド基材１の酸化物超電導塗料は、回転による遠心力で磁
気シールド基材１の内周面に付着すると共に、シーズヒ
ータ４で加熱することにより３〜５時間で乾燥する。そ
の後、この磁気シールド基材ｌを拡散炉で９８０’Ｃの
酸素雰囲気下で１時間、８００°Ｃで３時間本焼成し、
炉内で室温まで冷却すると、磁気シールド基材１の内周
面に酸化物超電導膜が形成され、磁気シールドが得られ
る。10 to 20 cc of the oxide superconducting paint thus obtained is injected into the 411i air shield base material 1 and sealed as described above. After that, a rotary machine (not shown) connecting the chunks 5 is driven, and the magnetic shield base material 1 is
was rotated for 2 hours at a rotation speed of 1200 rpm with its longitudinal direction as the central axis. At the same time, the heating temperature of the sheathed heater 4 is set to 130°C. Then, the oxide superconducting paint on the magnetic shielding base material 1 adheres to the inner peripheral surface of the magnetic shielding base material 1 due to the centrifugal force caused by the rotation, and is dried in 3 to 5 hours by heating with the sheathed heater 4. Thereafter, this magnetic shielding base material l was fired in a diffusion furnace in an oxygen atmosphere at 980°C for 1 hour and at 800°C for 3 hours.
When cooled to room temperature in the furnace, an oxide superconducting film is formed on the inner peripheral surface of the magnetic shield base material 1, and a magnetic shield is obtained.
この磁気シールドの膜厚はｌ、２ｍｍであり、膜厚の均
−製は±０．０２ｍｍ以内と良好であった。また、本発
明方法による磁気シールドを用いると、０．３Ｇの地磁
気を、０．０１５Ｇまでシールドすることができた。The film thickness of this magnetic shield was 1,2 mm, and the uniformity of the film thickness was good within ±0.02 mm. Furthermore, by using the magnetic shield according to the method of the present invention, it was possible to shield earth's magnetism of 0.3G down to 0.015G.
更に、本実施例においては円筒形の基材を用いたが、例
えば六角形１八角形等の多角形の筒を基材とし用いても
上述と同様に酸化物超電導膜を形成させることができる
。Further, although a cylindrical base material was used in this example, an oxide superconducting film can be formed in the same manner as described above even if a polygonal cylinder such as a hexagonal or octagonal cylinder is used as the base material. .
以上の如く、本発明に係る酸化物超電導膜の形成方法に
よると筒状の磁気シールド基材の内周面に均一な膜厚の
酸化物超電導膜が形成され、その磁気シールド特性は優
れている。As described above, according to the method for forming an oxide superconducting film according to the present invention, an oxide superconducting film having a uniform thickness is formed on the inner circumferential surface of a cylindrical magnetic shielding base material, and its magnetic shielding properties are excellent. .
第１図は本発明方法の実施例を説明するための横断面図
である。FIG. 1 is a cross-sectional view for explaining an embodiment of the method of the present invention.
Claims (1)
いて、前記基材内に所要量の酸化物超電導塗料を入れ、
該塗料を入れた基材をその長手方向を中心軸にして所要
の回転数で回転させることによって、基材内周面に前記
塗料による膜を形成させることを特徴とする酸化物超電
導膜の形成方法。1. In a method for forming an oxide superconducting film on a cylindrical base material, a required amount of oxide superconducting paint is placed in the base material,
Formation of an oxide superconducting film characterized by forming a film of the paint on the inner peripheral surface of the base material by rotating the base material containing the paint at a required rotational speed with its longitudinal direction as the central axis. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63259840A JPH02107786A (en) | 1988-10-14 | 1988-10-14 | Formation of oxide superconducting film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63259840A JPH02107786A (en) | 1988-10-14 | 1988-10-14 | Formation of oxide superconducting film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02107786A true JPH02107786A (en) | 1990-04-19 |
Family
ID=17339715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63259840A Pending JPH02107786A (en) | 1988-10-14 | 1988-10-14 | Formation of oxide superconducting film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02107786A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446083A (en) * | 1990-06-12 | 1992-02-17 | Reiko Co Ltd | Superconducting pipe and its production |
| JPH07226540A (en) * | 1994-02-09 | 1995-08-22 | Chodendo Sensor Kenkyusho:Kk | Sintering method for superconductor thick film |
-
1988
- 1988-10-14 JP JP63259840A patent/JPH02107786A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446083A (en) * | 1990-06-12 | 1992-02-17 | Reiko Co Ltd | Superconducting pipe and its production |
| JPH07226540A (en) * | 1994-02-09 | 1995-08-22 | Chodendo Sensor Kenkyusho:Kk | Sintering method for superconductor thick film |
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