JPH03242384A - Connection of bi-based oxide superconductor - Google Patents
Connection of bi-based oxide superconductorInfo
- Publication number
- JPH03242384A JPH03242384A JP2033793A JP3379390A JPH03242384A JP H03242384 A JPH03242384 A JP H03242384A JP 2033793 A JP2033793 A JP 2033793A JP 3379390 A JP3379390 A JP 3379390A JP H03242384 A JPH03242384 A JP H03242384A
- Authority
- JP
- Japan
- Prior art keywords
- based oxide
- superconductor
- oxide superconductor
- calcined powder
- connection
- 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
- 239000002887 superconductor Substances 0.000 title claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000002243 precursor Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000007796 conventional method Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 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)
- Superconductors And Manufacturing Methods Therefor (AREA)
- Ceramic Products (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、作業性等に優れたＢｉ系酸化物超電導体の接
続方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for connecting Bi-based oxide superconductors with excellent workability.
（従来の技術）
一般にＢｉ系酸化物超電導体の実用化に際してはそれら
の成形体の大型化あるいは長尺品化が必須のことである
。(Prior Art) Generally, in order to put Bi-based oxide superconductors into practical use, it is essential to make their molded bodies larger or longer.
この場合、ＦＸＢ ｉ系酸化物超電導体はその材料が脆
弱であり、他の銀、アルミナあるいはマグネシアなどの
基板と一体化して成形する手法が行われている。実際に
は、適当なバインダーと共に混練したＢｉｉ酸化物超電
導体前駆物質あるいは仮焼粉体を前述の基板上に所望量
塗りつけ、乾燥及び脱バインダー処理を行い、更に熱処
理して成形体を得ている。In this case, since the material of the FXB i-based oxide superconductor is fragile, a method is used in which it is formed integrally with another substrate such as silver, alumina, or magnesia. In practice, a desired amount of Bii oxide superconductor precursor or calcined powder kneaded with a suitable binder is applied onto the above-mentioned substrate, dried and binder removed, and then heat-treated to obtain a molded body. .
このような成形体は、上述した焼成時、あるいは高温使
用時などの急激な冷却に際し、前記基板とＢｉ系酸化物
超電導体との熱膨張係数の差により部分的なひび割れな
どの超電導体断裂部が発生することがある。When such a molded body is rapidly cooled during the above-mentioned firing or during high-temperature use, the superconductor ruptures, such as partial cracks, due to the difference in thermal expansion coefficient between the substrate and the Bi-based oxide superconductor. may occur.
かかる超電導体断裂部の発生により、その部分にて超電
導回路が切断され、超電導体成形体の特性低下を招く、
そのため適時、上記超電導体断裂部の補修接続が必要と
なる。Due to the occurrence of such a superconductor fracture, the superconducting circuit is severed at that part, leading to deterioration of the characteristics of the superconductor molded body.
Therefore, it is necessary to repair and connect the above-mentioned superconductor fracture portion at a timely manner.
又、Ｂｉ系超超電導体長尺化にあたっては、上述の成形
体を適宜接続して長尺品化する必要もある。Furthermore, in order to lengthen the Bi-based superconductor, it is also necessary to appropriately connect the above-mentioned molded bodies to make it into a long product.
従来のこのようなりｉ系酸化物超電導体の接続には、バ
インダーと混練したＢｉ系酸化物超電導体前導体あるい
は仮焼粉体を前記断裂部又は接続部に塗り付は等により
配置し、乾燥及び脱バインダー処理を行い、更に焼成処
理を施していた。In the conventional connection of i-based oxide superconductors, a pre-conductor of Bi-based oxide superconductor or calcined powder kneaded with a binder is applied to the fractured part or the connected part, and then dried. A binder removal treatment was performed, and a firing treatment was further performed.
（発明が解決しようとする課題）
しかし上記従来のＢｉ系酸化物超電導体の接続作業にお
いては、上述の熱処理に先立って、前記乾燥処理及び脱
バインダー処理工程が必要となり、全体の熱処理作業が
著しく複雑化する問題があった。(Problem to be Solved by the Invention) However, in the above-mentioned conventional connection work of Bi-based oxide superconductors, the drying process and debinding process are required prior to the above-mentioned heat treatment, and the overall heat treatment work is significantly increased. The problem was becoming more complicated.
又、このような複雑な熱処理は、その都度被処理品に対
する体積収縮を発生させ、超電導体の付着時の形態保持
を困難にさせる等Ｂｉ系酸化物超電導体の特性にも影響
を及ぼす恐れがあった。In addition, such complicated heat treatment causes volumetric shrinkage of the treated product each time, which may affect the properties of the Bi-based oxide superconductor, such as making it difficult to maintain the shape of the superconductor when it is attached. there were.
（課題を解決するための手段）
本発明者等は、上記問題点を解決すべく鋭意検討を重ね
た結果この発明を完成するに到ったものである。(Means for Solving the Problems) The present inventors have completed the present invention as a result of intensive studies to solve the above problems.
即ち本発明は、Ｂｉ系酸化物超を導体に生じた断裂部、
又は該超電導体相互間に、Ｂｉ系酸化物超電導体前駆体
あるいはそれらの仮焼粉体を適宜配置し、これら両材料
の溶融温度を超える温度にて前記断裂部又は接続部近傍
を加熱して両者を溶融−体化させ、常法により成形を行
った後熱処理を行うことを特徴とするＢｉ系酸化物超電
導体の接続方法である。That is, the present invention provides a fracture portion that occurs in a Bi-based oxide superconductor,
Alternatively, a Bi-based oxide superconductor precursor or a calcined powder thereof is appropriately arranged between the superconductors, and the vicinity of the fractured part or the connection part is heated at a temperature exceeding the melting temperature of both of these materials. This is a method for connecting Bi-based oxide superconductors, which is characterized in that both are melted, molded by a conventional method, and then heat treated.
本発明において、Ｂｉ系酸化物超電導体前駆体とは、構
成元素をそれぞれ含有する酸化物や炭酸塩などの化合物
の混合体、Ｂｉ系酸化物超電導体に合成されるまでの中
間体例えば共沈混合物、酸素欠損型複合酸化物、構成元
素の合金など酸素含有雰囲気中の加熱処理によりＢｉ系
酸化物超電導体に反応するものを意味する。又その仮焼
粉体は、上記原料物質をその融点以下の温度８８０ ’
Ｃ以下で熱処理して得られる。In the present invention, the Bi-based oxide superconductor precursor refers to a mixture of compounds such as oxides and carbonates containing each of the constituent elements, and intermediates until synthesis into the Bi-based oxide superconductor, such as coprecipitation. It means a mixture, an oxygen-deficient composite oxide, an alloy of constituent elements, etc. that reacts with the Bi-based oxide superconductor by heat treatment in an oxygen-containing atmosphere. The calcined powder is prepared by heating the raw material to a temperature of 880' below its melting point.
Obtained by heat treatment at temperatures below C.
又、上記前駆体及び仮焼粉体の断裂部又は接続部への配
置は、それらの散布、盛りつけなどにより行う。Further, the precursor and the calcined powder are placed on the fractured part or the connected part by scattering, piling, or the like.
上述の断裂部又は接続部での溶融一体化は、最も好まし
くはガスバーナーを用いて行うのが好適である。The melting and integration at the above-mentioned fractures or connections is most preferably carried out using a gas burner.
その温度条件は、Ｂｉ系酸化物超電導体の溶融温度であ
る８８０°Ｃ〜９２０°Ｃの範囲である。The temperature conditions are in the range of 880°C to 920°C, which is the melting temperature of the Bi-based oxide superconductor.
熔融一体化後の当該部分の成形は、実際には例えば白金
製へらなどによりその表面が平滑になるよう成形する。After melting and integrating, the part is actually molded using, for example, a platinum spatula so that its surface is smooth.
成形後の熱処理は、常法の如く、１０°（：／ｍｉｎ程
度で、９４０°Ｃ程度に昇温し、同率で約８４０°Ｃに
陣温させ、以下急冷を行う。The heat treatment after molding is carried out in the usual manner by raising the temperature to about 940°C at a rate of about 10° (:/min), raising the temperature to about 840°C at the same rate, and then rapidly cooling.
（作 用）
本発明は上記のように、Ｂｉ系酸化＄１超電導体断裂部
又は接続部に、Ｂｔ系酸化物超電導体前駆体あるいはそ
れらの仮焼粉体を適宜配置し、これら両材料の溶融温度
を超える温度にて前記断裂部又は接続部近傍を加熱して
両者を溶融一体化させるものである。(Function) As described above, in the present invention, a Bt-based oxide superconductor precursor or a calcined powder thereof is appropriately placed in a fractured part or a connection part of a Bi-based oxidized $1 superconductor, and The vicinity of the rupture portion or the connection portion is heated to a temperature exceeding the melting temperature to melt and integrate the two.
そして、上記熔融一体化は、ガスバーナ等の照射により
非常に作業性良く行われることになり、熱処理が単純化
され、当該部品での熱収縮現象も少なくなり、結果的に
上述の超電導体形態保持が得易（なる。The above-mentioned melting and integration can be performed very easily by irradiation with a gas burner, etc., which simplifies the heat treatment and reduces the thermal shrinkage phenomenon in the parts, resulting in the above-mentioned superconductor shape retention. is easy to obtain.
（実施例） 以下実施例によりこの発明を具体的に説明する。(Example) The present invention will be specifically explained below with reference to Examples.
実施例１
第１図ａ、ｂは、５Ｃ１１１幅のＡｇ基体１上に、０．
３■厚のＢｉｚＳｒｚＣａＣｕｇＯ工２を形成した成形
体３において、その全幅にわたり０．５ａ幅に生じた断
裂部４を接続する例である。Example 1 FIGS. 1a and 1b show that a 0.0.
This is an example of connecting a fractured part 4 which is 0.5a wide over the entire width of a molded body 3 formed with a BizSrzCaCugO process 2 having a thickness of 3cm.
前記断裂部４上に、ＢｉｚＳｒｚＣａＣｕｚＯｘ仮焼粉
体５を散布し、ガスバーナー６を当該部に当てて両者を
溶融させ、加熱部を白金製こて７により表面を平滑化し
た。BizSrzCaCuzOx calcined powder 5 was sprinkled on the fractured part 4, a gas burner 6 was applied to the part to melt both, and the surface of the heated part was smoothed with a platinum trowel 7.
次にバーナー６での加熱を停止し冷却した０次いで、酸
素雰囲気中１０℃／腸Ｉｎにて９４０°Ｃに昇温し、同
温度勾配にて８５０℃に陳温し６時間保持し急冷した。Next, the heating with burner 6 was stopped and cooled.Then, the temperature was raised to 940°C in an oxygen atmosphere at 10°C/Intestine In, and then the temperature was raised to 850°C with the same temperature gradient, and the temperature was maintained for 6 hours to quench. .
接合部をはさみ、４端子法にて電気抵抗値を測定したと
ころ、液体窒素温度にて超電導を示し、超電導体接合が
良好に行われたことをｆ！認した。When we sandwiched the joint and measured the electrical resistance value using the four-terminal method, it showed superconductivity at liquid nitrogen temperature, indicating that the superconductor joining was successful! Approved.
又、同位置にて臨界電流密度（Ｊｃ）を測定したところ
１２０Ａ／ｃｄであった。Further, when the critical current density (Jc) was measured at the same position, it was 120 A/cd.
実施例２
第２図ａ、ｂは、切口３Ｘ２ｍ＋＋、長さ２０ｍの一つ
の棒状のＢｉｚＳｒｚＣａＣｕｚＯｘ成形体２ａ ２
ａの接続の例を示す。Example 2 Figures 2 a and b show one rod-shaped BizSrzCaCuzOx molded body 2a 2 with a cut section of 3 x 2 m++ and a length of 20 m.
An example of connection a is shown.
接続部４ａ上に、ＢｉｚＳｒｚＣａＣｕｚＯｘ仮焼粉体
５ａを散布し、実施例１に準してガスバーナー６を用い
当該部分の超電導体を溶融一体化させた。BizSrzCaCuzOx calcined powder 5a was sprinkled on the connecting portion 4a, and the superconductor in that portion was melted and integrated using the gas burner 6 in accordance with Example 1.
以下実施例１と同様にして、加熱部成形及び熱処理を行
った。Thereafter, heating section molding and heat treatment were performed in the same manner as in Example 1.
同様にして接続部の評価を行ったところ、液体窒素温度
で超電導を示し、又、Ｊｃ値は１３０Ａ／ｃｄであった
。When the connection was similarly evaluated, it showed superconductivity at liquid nitrogen temperature, and the Jc value was 130 A/cd.
実施例３
第３図ａ、ｂは、シールド機器等用の大口径円筒体１ｂ
をの接続例を示す。Example 3 Figures 3a and 3b show a large diameter cylindrical body 1b for shield equipment, etc.
An example of how to connect is shown below.
厚さ５＋ｍ＋＋、径５０ｃ＋ａのＡ、円筒上に０．３
ｌｌｌ１１厚のＢｉｚＳｒｚＣａＣｕｚＯつが被着され
て形成されている。図の如く一方が他方に嵌合される構
成にて接続部４ｂを形成し、この接続部４ｂ上にＢｉｚ
ＳｒｚＣａＣｕｚＯ＋＋仮焼粉体５ｂを散布し、実施例
１に準じてガスバーナー６を用いて当該部分の超電導体
を溶融一体化させた。Thickness 5+m++, diameter 50c+a A, 0.3 on cylinder
It is formed by depositing BizSrzCaCuzO with a thickness of lll11. As shown in the figure, a connecting portion 4b is formed in a configuration in which one is fitted into the other, and a Biz
SrzCaCuzO++ calcined powder 5b was spread, and the superconductor in the relevant portion was melted and integrated using the gas burner 6 according to Example 1.
以下実施例１と同様に、加熱部成形及び熱処理等を行い
、接続部の評価を行った。その結果、円筒体中心部（第
３図Ａ）での磁束密度は５Ｘ１０−’Ｇであり、地磁気
を十分に遮蔽し接合が完全に行われていることが認めら
れた。Thereafter, heating portion molding, heat treatment, etc. were performed in the same manner as in Example 1, and the connection portion was evaluated. As a result, the magnetic flux density at the center of the cylinder (FIG. 3A) was 5×10 −'G, and it was confirmed that the earth's magnetic field was sufficiently shielded and the bonding was completed.
（発明の効果）
この発明は上記の如＜、Ｂｉ系酸化物超電導体の断裂部
、又はそれら相互の接続にあたり、該酸化物超電導体前
駆体あるいはそれらの仮焼粉体を適宜配置し、これら両
材料の溶融温度を超える温度にて前記断裂部又は接続部
近傍を加熱して両者を溶融一体化させ、常法により成形
を行った後熱処理を行うようにしたので、該溶融化作業
が非常に作業性良く行われることになり、熱処理が単純
化され、当該部分での熱収縮現象も少なくなり、結果的
に上述の超電導体形態保持が得易くなるなどの効果をも
たらし、上記の問題が解消される。(Effects of the Invention) As described above, the present invention provides for the oxide superconductor precursor or its calcined powder to be appropriately arranged at the fractured portion of the Bi-based oxide superconductor or for their mutual connection. The area near the fractured part or the connection part is heated at a temperature exceeding the melting temperature of both materials to fuse and integrate them, and the heat treatment is performed after molding by a conventional method, so that the melting work is extremely difficult. This simplifies the heat treatment and reduces the thermal shrinkage phenomenon in the relevant parts, resulting in the above-mentioned ability to maintain the superconductor shape more easily, which solves the above-mentioned problems. It will be resolved.
第１図〜第３図は、この発明の接続作業の３つの例を示
す説明図である。
１・・・基体、２．２ａ−・・超電導体、４．４ａ、４
ｂ・・・断裂部（接続部）、５．５ａ、５ｂ・・・仮焼
粉体。
第１図
第
２
図
第
図
ｂ
ｂFIGS. 1 to 3 are explanatory diagrams showing three examples of connection work according to the present invention. 1... Substrate, 2.2a-... Superconductor, 4.4a, 4
b...Tear section (connection section), 5.5a, 5b...Calcined powder. Figure 1 Figure 2 Figure b b
Claims (1)
相互間に、Ｂｉ系酸化物超電導体前駆体あるいはそれら
の仮焼粉体を適宜配置し、これら両材料の溶融温度を超
える温度にて前記断裂部又は接続部近傍を加熱して両者
を溶融一体化させ、常法により成形を行った後熱処理を
行うことを特徴とするＢｉ系酸化物超電導体の接続方法
。A Bi-based oxide superconductor precursor or its calcined powder is appropriately placed in the fractured part of the Bi-based oxide superconductor or between the superconductors, and heated to a temperature exceeding the melting temperature of both materials. A method for connecting Bi-based oxide superconductors, characterized in that the vicinity of the fractured part or the connected part is heated to melt and integrate the two, and after being molded by a conventional method, a heat treatment is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2033793A JPH03242384A (en) | 1990-02-16 | 1990-02-16 | Connection of bi-based oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2033793A JPH03242384A (en) | 1990-02-16 | 1990-02-16 | Connection of bi-based oxide superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03242384A true JPH03242384A (en) | 1991-10-29 |
Family
ID=12396351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2033793A Pending JPH03242384A (en) | 1990-02-16 | 1990-02-16 | Connection of bi-based oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03242384A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07157372A (en) * | 1993-12-02 | 1995-06-20 | Chubu Electric Power Co Inc | Method for joining bismuth-containing high temperature superconductor |
| DE112007003312T5 (en) | 2007-01-31 | 2010-01-28 | Council Of Scientific & Industrial Research | Method for connecting oxide superconducting tubes with a superconducting joint |
| JP2018127381A (en) * | 2017-02-08 | 2018-08-16 | 新日鐵住金株式会社 | Method for producing superconductive bulk conjugate |
-
1990
- 1990-02-16 JP JP2033793A patent/JPH03242384A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07157372A (en) * | 1993-12-02 | 1995-06-20 | Chubu Electric Power Co Inc | Method for joining bismuth-containing high temperature superconductor |
| DE112007003312T5 (en) | 2007-01-31 | 2010-01-28 | Council Of Scientific & Industrial Research | Method for connecting oxide superconducting tubes with a superconducting joint |
| DE112007003312B4 (en) * | 2007-01-31 | 2019-02-07 | Council Of Scientific & Industrial Research | Method for connecting oxide superconducting tubes with a superconducting joint |
| JP2018127381A (en) * | 2017-02-08 | 2018-08-16 | 新日鐵住金株式会社 | Method for producing superconductive bulk conjugate |
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