JPH02302380A - Joining of superconductor - Google Patents
Joining of superconductorInfo
- Publication number
- JPH02302380A JPH02302380A JP1123269A JP12326989A JPH02302380A JP H02302380 A JPH02302380 A JP H02302380A JP 1123269 A JP1123269 A JP 1123269A JP 12326989 A JP12326989 A JP 12326989A JP H02302380 A JPH02302380 A JP H02302380A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- superconductors
- joining
- superconducting
- superconducting material
- 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.)
- Granted
Links
- 239000002887 superconductor Substances 0.000 title claims abstract description 105
- 239000000126 substance Substances 0.000 claims abstract description 29
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 239000000654 additive Substances 0.000 claims abstract description 20
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000013078 crystal Substances 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 41
- 239000007767 bonding agent Substances 0.000 claims description 39
- 238000000034 method Methods 0.000 claims description 30
- 238000000465 moulding Methods 0.000 claims description 2
- BERDEBHAJNAUOM-UHFFFAOYSA-N copper(I) oxide Inorganic materials [Cu]O[Cu] BERDEBHAJNAUOM-UHFFFAOYSA-N 0.000 abstract description 10
- KRFJLUBVMFXRPN-UHFFFAOYSA-N cuprous oxide Chemical compound [O-2].[Cu+].[Cu+] KRFJLUBVMFXRPN-UHFFFAOYSA-N 0.000 abstract description 10
- XMFOQHDPRMAJNU-UHFFFAOYSA-N lead(II,IV) oxide Inorganic materials O1[Pb]O[Pb]11O[Pb]O1 XMFOQHDPRMAJNU-UHFFFAOYSA-N 0.000 abstract description 7
- 229910000417 bismuth pentoxide Inorganic materials 0.000 abstract description 5
- 239000011230 binding agent Substances 0.000 abstract description 4
- 229910008649 Tl2O3 Inorganic materials 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- QTQRFJQXXUPYDI-UHFFFAOYSA-N oxo(oxothallanyloxy)thallane Chemical compound O=[Tl]O[Tl]=O QTQRFJQXXUPYDI-UHFFFAOYSA-N 0.000 abstract 1
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 24
- 239000000843 powder Substances 0.000 description 16
- 238000005245 sintering Methods 0.000 description 13
- 238000002844 melting Methods 0.000 description 7
- 239000008188 pellet Substances 0.000 description 7
- 230000008018 melting Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 description 2
- 239000002612 dispersion medium Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- FWVCSXWHVOOTFJ-UHFFFAOYSA-N 1-(2-chloroethylsulfanyl)-2-[2-(2-chloroethylsulfanyl)ethoxy]ethane Chemical compound ClCCSCCOCCSCCCl FWVCSXWHVOOTFJ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010946 fine silver Substances 0.000 description 1
- 239000007858 starting material 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)
- Superconductor Devices And Manufacturing Methods Thereof (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、超電導体どうしを接合する超電導体の接合方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a superconductor bonding method for bonding superconductors to each other.
［従来の技術］
超電導体どうしを接合する方法は、未だ研究段階であり
、確立された方法は知られていない。しかし、従来の接
合技術の延長として以下の方法が考えられる。[Prior Art] The method of joining superconductors together is still in the research stage, and no established method is known. However, the following method can be considered as an extension of the conventional bonding technology.
■ 接合すべき超電導体の接合部に低融点金属を溶かし
て塗布し、これら超電導体の接合部どうしを突き合わせ
て前記低融点金属を冷却固化することにより接合する方
法。(2) A method of joining by melting and applying a low melting point metal to the joint portions of superconductors to be joined, butting the joint portions of these superconductors against each other, and cooling and solidifying the low melting point metal.
■ 超電導体の共沈物を出発材料とした粒径数μｍアン
ダーの超電導体の微粉末、または、乾式で合成した超電
導体の微粉末を分散媒体中に分散させて作成したペース
トを接合すべき超電導体の接合部に塗布し、これら超電
導体の接合部どうしを突き合わせて焼結することにより
接合する方法。■ Superconductor fine powder with a particle size of several micrometers or less made from superconductor coprecipitate as a starting material, or a paste made by dispersing dry-synthesized superconductor fine powder in a dispersion medium should be used for bonding. A method of joining by coating the joints of superconductors, then butting and sintering the joints of these superconductors.
■ 銀微粉末を分散媒体中に分散させて作成した銀ペー
ストを接合すべき超電導体の接合部に塗布し、これら超
電導体の接合部どうしを突き合わせて焼結することによ
り接合する方法。■ A method of joining by applying a silver paste made by dispersing fine silver powder in a dispersion medium to the joints of superconductors to be joined, and then butting and sintering the joints of these superconductors.
「発明が解決しようとする課題］
ところが、従来技術の延長上にある上述の各方法には以
下のような問題点があった。"Problems to be Solved by the Invention" However, the above-mentioned methods, which are extensions of the conventional techniques, have the following problems.
（イ） ■の方法
低融点金属が超電導体でないことから、前記接合面間の
低融点金属の部分が電気抵抗を持ち、接合した超電導体
間で超電導電流を流せなくなる。(a) Method (2) Since the low melting point metal is not a superconductor, the portion of the low melting point metal between the bonded surfaces has electrical resistance, making it impossible for superconducting current to flow between the bonded superconductors.
また、例えば、高い臨界温度（Ｔｃ）を有するＹ１Ｂａ
２ Ｃｕ３Ｏ７．、
Ｂ ｉ２ Ｓｒ”２ Ｃａ２ Ｃｕ３Ｏ１０、Ｔｊｌ
２ Ｂａ２ Ｃａ２ Ｃｕ３Ｏ１０等の超電導体では、
コヒーレンス長が数十人である。したがって、接合部に
おける超電導体間に介在される低融点金属の厚さを数十
Å以下としなければ超電導電流を流すことができない。Also, for example, Y1Ba having a high critical temperature (Tc)
2 Cu3O7. , B i2 Sr”2 Ca2 Cu3O10, Tjl
2 In superconductors such as Ba2 Ca2 Cu3O10,
The coherence length is several dozen people. Therefore, a superconducting current cannot flow unless the thickness of the low melting point metal interposed between the superconductors at the joint is several tens of angstroms or less.
しかし、この接合剤たる低融点金属の厚さをこのように
薄くして接合することはほとんど不可能である。However, it is almost impossible to reduce the thickness of the low-melting point metal used as the bonding agent to achieve bonding.
（ロ） ■の方法
この方法は、接合剤として、超電導体の微粉末を用いる
ものであるから、前記■のような不都合は回避できる。(B) Method (2) Since this method uses fine superconductor powder as a bonding agent, the disadvantages mentioned in (2) above can be avoided.
しかし、例えば、接合対象たる超電導体としてのＹＩ
Ｂａ２ Ｃｕ３Ｏ７−ｘを、接合剤としてこの超電導体
の微粉末を用いて接合する場合を考えると、この場合の
接合焼結温度として、接合対象たる超電導体を製造する
際の焼結温度とほぼ同程度の温度を選定する必要がある
。すなわち、ＹｌＢ ａ２ Ｃｕ ３Ｏ７−ｘを製造す
る際の焼結温度は９２０〜９５０°Ｃであるから、十分
な接合強度を得るなめにはこの場合の接合温度を９４０
℃程度とする必要がある。この接合温度を例えば、９２
０℃と低い温度にすると、接合強度が弱くなって実用に
ならない。However, for example, YI as a superconductor to be bonded
Considering the case where Ba2Cu3O7-x is bonded using fine powder of this superconductor as a bonding agent, the bonding sintering temperature in this case is approximately the same as the sintering temperature when manufacturing the superconductor to be bonded. It is necessary to select the appropriate temperature. That is, since the sintering temperature when manufacturing YlB a2 Cu 3O7-x is 920 to 950°C, in order to obtain sufficient bonding strength, the bonding temperature in this case should be 940°C.
It needs to be around ℃. For example, if this junction temperature is 92
If the temperature is as low as 0°C, the bonding strength will be too weak to be of practical use.
ところが、接合温度を９４０℃にすると、接合対象たる
超電導体自体が歪んだり、変形したりするという不都合
が生じてしまう。この事情は他の超電導体の場合も同じ
である。However, if the bonding temperature is set to 940° C., the superconductor itself to be bonded may be distorted or deformed. This situation is the same for other superconductors.
（ハ） ■の方法
この方法は、上記■及び■の問題点を一応は回避可能で
ある。しかし、接合面に塗布された銀ペーストの銀が焼
結によって超電導体中に拡散していくため、この接合部
に空洞が生ずるおそれが高く、これにより、この接合部
での超電導電流を阻害するおそれがある。また、銀は、
Ｙ１Ｂａ２ Ｃｕ３Ｏ７−ｘの接合には適用できるが、
焼結温度が高いことと、拡散した場合に超電導体として
の性質を破壊してしまう等の理由から、Ｂｉ２５ｒ２Ｃ
ａ２ Ｃｕ３Ｏ１０．Ｔｊ ２Ｂａ２ Ｃａ２ Ｃｕ３
Ｏ１ｏ等の他の超電導体の接合には用いることができな
い。(C) Method (3) This method can avoid the above-mentioned problems (2) and (3). However, as the silver in the silver paste applied to the joint surface diffuses into the superconductor through sintering, there is a high possibility that cavities will form in this joint, which will inhibit the superconducting current at this joint. There is a risk. Also, silver is
Although it can be applied to joining Y1Ba2 Cu3O7-x,
Bi25r2C
a2 Cu3O10. Tj 2Ba2 Ca2 Cu3
It cannot be used for joining other superconductors such as O1o.
本発明は、上述の背景のもとでなされたものであり、接
合された超電導体が一体となって一つの超電導体として
作用することができるとともに、十分な接合強度を発揮
することができる超電導体の接合方法を提供することを
目的としたものである。The present invention was made against the above-mentioned background, and the present invention is a superconductor in which bonded superconductors can act as a single superconductor and exhibit sufficient bonding strength. The purpose is to provide a method for joining bodies.
［課題を解決するための手段］
本願の第１の発明は、以下の構成とすることで上述の課
題を解決している。[Means for Solving the Problems] The first invention of the present application solves the above problems by having the following configuration.
（１）接合すべき超電導体の接合面に、超電導物質と添
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｙ１Ｂａ２ Ｃｕ３ｏ７−ｘの組成を有する超電
導物質または該超電導物ＭＹ１Ｂａ２ Ｃｕ３Ｏ７−ｘ
におけるＹもしくはＢａを他の元素で置換した組成を有
し、ＹｌＢ ａ２ Ｃｕ ３Ｏ７．の組成を有する超電
導物質と同一または類似の結晶構造を有する超電導物質
の成型体を用い、
前記接合剤として、前記接合す及き超電導体の成型体を
構成する超電導物質と同一または類似の超電導物質と、
添加物贋としてＡｇＯもしくはＣｕ２Ｏのいずれか１つ
またはＡｇＯとＣｕ２Ｏとの双方を含むものを用いるこ
とを特徴とした構成。(1) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. The superconductor to be bonded is a superconducting material having a composition of Y1Ba2 Cu3o7-x or the superconductor MY1Ba2 Cu3O7-x.
YlB a2 Cu 3O7. using a molded body of a superconducting material having the same or similar crystal structure as a superconducting material having a composition, and using a superconducting material that is the same as or similar to the superconducting material constituting the molded body of the superconducting material and the superconducting material as the bonding agent. and,
A configuration characterized in that an additive containing either one of AgO or Cu2O or one containing both AgO and Cu2O is used.
また、本願の第２の発明は、以下の構成とすることで上
述の課題を解決している。Moreover, the second invention of the present application solves the above-mentioned problem by having the following configuration.
（２）接合すべき超電導体の接合面に、超電導物質と添
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｂ １２−Ｘ Ｐ ｂｘ （Ｓ ｌ：” １−
ｙ Ｃａｙ ） ４ Ｃｕ３ＯｘもしくはＢｉ２−Ｘ
Ｐ ｂｙ： （Ｓ １：” １−ｙ Ｃａｙ ） ３
Ｃｕ２０ｘの組成を有する超電導物質、または、これ
ら超電導物質の構成元素の一部を他の元素に置換した組
成を有し、これら超電導物質と同一または類似の結晶構
造を有する超電導物質の成型体を用い、前記接合剤とし
て、前記接合すべき超電導体の成型体を構成する超電導
物質と同一または類似の超電導物質と、添加物質として
ＢｉＯ，Ｂｉ２Ｏ５、ＰｂＯ，Ｐｂ２Ｏ３，Ｐｂ３ｏ４
．Ｔ磨２０３もしくはＣｕ２Ｏのいずれか１つまたはＢ
ｉｂ。(2) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. Then, as the superconductor to be bonded, B 12-X P bx (S l:" 1-
y Cay ) 4 Cu3Ox or Bi2-X
P by: (S 1:” 1-y Cay) 3
Using a superconducting material having a composition of Cu20x, or a molded body of a superconducting material having a composition in which some of the constituent elements of these superconducting materials are replaced with other elements and having the same or similar crystal structure as these superconducting materials. , as the bonding agent, a superconducting material that is the same as or similar to the superconducting material constituting the molded body of the superconductor to be bonded, and as additive substances, BiO, Bi2O5, PbO, Pb2O3, Pb3o4.
．． Either one of T polish 203 or Cu2O or B
ib.
Ｂｉ２Ｏ５、ＰｂＯ，Ｐｂ２ｏ３．Ｐｂ３Ｏ４゜ＴＮ２
０３もしくはＣｕ２Ｏのうちのいずれか２以上を組み合
わせたものとを含むものを用いることを特徴とした構成
。Bi2O5, PbO, Pb2o3. Pb3O4゜TN2
03 or a combination of two or more of Cu2O.
さらに、本願の第３の発明は、以下の構成とすることで
上述の課題を解決している。Furthermore, the third invention of the present application solves the above-mentioned problem by having the following configuration.
（３）接合すべき超電導体の接合面に、超電導物質と添
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｔ、Ｉ） （Ｂ−Ｘ
ａｌ−ｙ Ｃａｙ＞ ４ Ｃｕ３Ｏ１０−Ｚまたはｌ
２−ｘ（Ｂ ａｌ−ｙ Ｃａｙ ＞ ３ Ｃｕ２ ｏｌ
ｏ−ｚの組成を有する超電導物質またはこれら組成にお
けるＴＮ、ＢａもしくはＣａを他の元素で置換した組成
を有し、これらの組成を有する超電導物質と同一または
類似の結晶構造を有する超電導物質の成型体を用い、前
記接合剤として、前記接合すべき超電導体の成型体を構
成する超電導物質と同一または類似の超電導物質と、添
加物質としてＢ ｉ Ｏ，Ｂ ｉ２０５ 、ｐｂｏ、Ｐ
ｂ Ｏ、Ｐｂ３Ｏ４，ＴＪ２０３もしくはＣｕ２Ｏの
いずれか１つまたはＢｉｂ。(3) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. The superconductor to be bonded is T, I) (B-X al-y Cay>4 Cu3O10-Z or l
2-x(B al-y Cay > 3 Cu2 ol
Molding of a superconducting material having a composition of oz or a superconducting material having a composition in which TN, Ba or Ca in these compositions is replaced with other elements and having the same or similar crystal structure as a superconducting material having these compositions A superconducting material that is the same as or similar to the superconducting material constituting the molded body of the superconductor to be bonded as the bonding agent, and B i O, B i205 , pbo, P as the additive substance.
b Any one of O, Pb3O4, TJ203 or Cu2O or Bib.
Ｂｉ２０５ 、ＰｂＯ，Ｐｂ２０３ 、Ｐｂ３Ｏ４ 。Bi205, PbO, Pb203, Pb3O4.
Ｔ （Ｊ ２０３もしくはＣｕ２Ｏのうちのいずれか２
以上を組み合わせたものとを含むものを用いることを特
徴とした構成。T (any 2 of J 203 or Cu2O
A configuration characterized by using a combination of the above.
［作用］
上述の各構成によれば、接合すべき超電導体の接合面に
接合剤を塗布し、これら接合面を突き合わせて焼結する
ことにより、接合剤が固化するとともに拡散結合して超
電導体どうしが接合される。[Operation] According to each of the above-mentioned configurations, a bonding agent is applied to the bonding surfaces of the superconductors to be bonded, and these bonding surfaces are brought together and sintered, so that the bonding agent solidifies and is diffusely bonded to form the superconductor. The pieces are joined together.
この場合、上述の各構成における接合剤は、超電導体物
質と、添加物質とを含むものである。そして、これらの
添加物質はいずれも、前記超電導体物質と混合した場合
に、この混合物の焼結温度を該超電導体物質単独におけ
る焼結温度よりも低くするような物質であり、かつ、接
合対象たる超電導体中に拡散した場合にもこの超電導体
の超電導性を破壊しない物質である。したがって、焼結
の際に接合対象たる超電導体を歪ませたり変形させたり
、あるいは、超電導性を低下させたりするおそれがない
。さらには、前記接合剤が超電導体物質と添加物質とを
含むものであることから、焼結の際に、前記添加物質が
接合対象たる超電導体中に拡散移動した場合にも、この
移動によって生ずる空洞が超電導電流を阻害する程大き
くなることはない。In this case, the bonding agent in each of the above configurations includes a superconductor material and an additive material. All of these additive substances are substances that, when mixed with the superconductor material, lower the sintering temperature of this mixture than the sintering temperature of the superconductor material alone, and that It is a substance that does not destroy the superconductivity of the superconductor even if it diffuses into the superconductor. Therefore, there is no risk of distorting or deforming the superconductor to be joined during sintering, or of reducing superconductivity. Furthermore, since the bonding agent contains a superconductor substance and an additive substance, even if the additive substance diffuses into the superconductor to be bonded during sintering, the cavities generated by this movement are It does not become large enough to inhibit superconducting current.
［実施例コ
（第１実施例）
この実施例は、超電導体Ｙ１Ｂ ａ ２ Ｃｕ ３Ｏ７
−８の成型体どうしを接合した例である。以下第１実施
例を詳述する。[Example 1 (1st example) This example is a superconductor Y1B a 2 Cu 3O7
This is an example in which the molded bodies of No.-8 were joined together. The first embodiment will be described in detail below.
＊接合対象の超電導体
臨界温度（Ｔｃ）が９０にのＹＩ Ｂ ａ２Ｃｕ ３Ｏ
７−ｘの半インチペレット。*YI B a2Cu 3O whose superconductor critical temperature (Tc) to be bonded is 90
7-x half-inch pellets.
＊用いた接合剤
ＡｇＯの粒径１ μｍアンダー粉にＹ１Ｂａ２ Ｃｕ３
Ｏ７−ｘの３μｍアンダー粉を５０ｗｔ％添加し、よく
混合し、トルエンをまぜてペースト状に形成したもの。* Y1Ba2 Cu3 to the particle size of 1 μm under powder of AgO bonding agent used
50wt% of O7-x 3μm under powder was added, mixed well, and mixed with toluene to form a paste.
上記接合剤を上記超電導体の接合面に、厚さ約１００μ
ｍ程度塗り付けた後、これを、９００℃で１０時間焼結
した。Apply the above bonding agent to the bonding surface of the superconductor to a thickness of approximately 100 μm.
After about 100 m of coating, this was sintered at 900° C. for 10 hours.
こうして接合した後、接合強度を測定したところ、０．
２Ｋｇ／ｃｍ”以上であった。After bonding in this way, the bonding strength was measured and found to be 0.
2Kg/cm" or more.
また、この接合界面を四端子法で測定しなところ、Ｔｃ
が９０にの超電導特性を示すことが確認された。Furthermore, when this bonding interface was measured using the four-terminal method, Tc
was confirmed to exhibit superconducting properties of 90%.
第１図は、接合剤に添加する超電導体（Ｙ１Ｂａ ２
Ｃｕ ３Ｏ７−Ｘ ）の混合割合を種々変え、各々の場
合の接合剤を用いて接合し、各場合の接合強度を測定し
た結果を示すグラフである。図において、縦軸が接合強
度Ｆ（単位ＨＫｇ／ｃｍ２）、横軸が超電導体の混合割
合α（単位；ｗｔ％）である。Figure 1 shows the superconductor (Y1Ba 2
It is a graph showing the results of measuring the bonding strength in each case by varying the mixing ratio of Cu 3O7-X ) and bonding using the bonding agent in each case. In the figure, the vertical axis is the bonding strength F (unit: HKg/cm2), and the horizontal axis is the superconductor mixing ratio α (unit: wt%).
なお、この場合、超電導体の混合割合αが０に近付くに
したがって接合強度が増すが、超電導体の混合割合を０
にすると、接合後、該接合部が超電導性を示さなくなる
。このため、少なくともαの値を２０以上とする必要が
あった。In this case, the bonding strength increases as the superconductor mixing ratio α approaches 0, but when the superconductor mixing ratio α approaches 0, the bonding strength increases.
If this is done, the bonded portion will no longer exhibit superconductivity after bonding. For this reason, it was necessary to set at least the value of α to 20 or more.
（第２実施例）
この実施例も、超電導体Ｙ１Ｂａ２ Ｃｕ３Ｏ□−８の
成型体どうしを接合した例であるが、用いた接合剤が前
記第１実施例を異なる。以下第２実施例を詳述する。(Second Example) This example is also an example in which molded bodies of superconductor Y1Ba2 Cu3O□-8 are bonded together, but the bonding agent used is different from that of the first example. The second embodiment will be described in detail below.
＊接合対象の超電導体（第１実施例と同じ〉臨界温度（
Ｔｃ）が９０にのＹＩ Ｂａ２ Ｃｕ３ＯＮの半インチ
ペレット。*Superconductor to be bonded (same as in the first example) critical temperature (
Half-inch pellets of YI Ba2 Cu3ON with Tc) of 90.
＊用いた接合剤
Ｃｕ２ＯペーストにＹＩ Ｂ ａ２ Ｃｕ ３Ｏ７−、
、の３μｍアンダー粉を２０ｗｔ％添加し、よく混合し
てペースト状に形成したもの。*YI B a2 Cu 3O7-,
Added 20wt% of 3μm under powder of , and mixed well to form a paste.
上記接合剤を上記超電導体の接合面に、厚さ約１００μ
ｍ程度塗り付けた後、これを、９２０℃で１０時間焼結
した。Apply the above bonding agent to the bonding surface of the superconductor to a thickness of approximately 100 μm.
After applying the coating in a thickness of about 100 m, this was sintered at 920° C. for 10 hours.
こうして接合した後、接合強度を測定したところ、０．
５Ｋｇ／ｃｍ２であった。After bonding in this way, the bonding strength was measured and found to be 0.
It was 5Kg/cm2.
また、この接合界面を四端子法で測定したところ、Ｔｃ
が９０にの超電導特性を示すことが確認された。Furthermore, when this bonding interface was measured using the four-probe method, it was found that Tc
was confirmed to exhibit superconducting properties of 90%.
（第３実施例）
この実施例は、超電導体Ｂｉ１．７ Ｐｂ（３３Ｓｒ２
Ｃａ２ Ｃｕ ３Ｏ１０の成型体どうしを接合した例
である。以下第３実施例を詳述する。(Third Example) In this example, superconductor Bi1.7Pb(33Sr2
This is an example in which molded bodies of Ca2Cu3O10 are joined together. The third embodiment will be described in detail below.
＊接合対象の超電導体
臨界温度（Ｔｃ）が１００ ＫのＢ ｉ １．７ Ｐ
ｂ□、３Ｓ １”２ Ｃａ２Ｃｕ３Ｏ１０の半インチペ
レット。*B i 1.7 P whose superconductor critical temperature (Tc) to be bonded is 100 K
b□, half-inch pellets of 3S 1”2 Ca2Cu3O10.
＊用いた接合剤
Ｐｂ３Ｏ４の粒径３μｍアンダー粉にＢｉ２５ｒ２Ｃａ
２Ｃｕ３Ｏ１ｏの３μｍアンダー粉を５０ｗｔ％添加し
、よく混合し、さらに、トルエン１０ｗｔ％をまぜてペ
ースト状に形成したもの。*Bi25r2Ca was added to the particle size 3μm under powder of the binder Pb3O4 used.
50wt% of 3μm under powder of 2Cu3O1o was added, mixed well, and further mixed with 10wt% of toluene to form a paste.
上記接合剤を上記超電導体の接合面に、厚さ約１００μ
ｍ程度塗り付けた後、これを、８３Ｏ℃で１０時間焼結
しな。Apply the above bonding agent to the bonding surface of the superconductor to a thickness of approximately 100 μm.
After coating about 100 m thick, this was sintered at 830°C for 10 hours.
こうして接合した後、接合強度を測定したところ、０．
５Ｋｇ／ｃｍ”であった。After bonding in this way, the bonding strength was measured and found to be 0.
5Kg/cm".
また、この接合界面を四端子法で測定したところ、Ｔｃ
が１００ Ｋの超電導特性を示すことが確認された。Furthermore, when this bonding interface was measured using the four-probe method, it was found that Tc
was confirmed to exhibit superconducting properties at 100 K.
なお、前記接合剤として、Ｐｂ３Ｏ４の代わりにＢｉｂ
、Ｐｂ、Ｐｂ２０３ 、ＴＮ ２０３もしくはＣｕ２Ｏ
を用いたものでもほぼ同様の結果が得られた。In addition, as the bonding agent, Bib3O4 is used instead of Pb3O4.
, Pb, Pb203, TN 203 or Cu2O
Almost similar results were obtained using .
（第４実施例）
この実施例は、用いた接合剤が異なるほかは前記第３実
施例と同一の構成及び作用効果を有するので、接合剤以
外の説明は省略する。(Fourth Embodiment) This embodiment has the same structure and effects as the third embodiment except that the bonding agent used is different, so explanations other than the bonding agent will be omitted.
＊用いた接合剤
ｐｂｏにＢｉ２Ｏ３を５０ｗｔ％添加して混合し、これ
に、さらに、Ｂ ｉ ２ Ｓ ！”２ Ｃａ２ Ｃｕ３
Ｏ１０の３μｍアンダー粉を前記混合物の全１の５０ｗ
ｔ％添加し、トルエンを加えてよく混合してペースト状
に形成したもの。*50 wt% of Bi2O3 is added to the used bonding agent pbo and mixed, and to this, B i 2 S! ”2 Ca2 Cu3
Add 3μm under powder of O10 to 50w of total 1 of the mixture.
t% added, toluene added and mixed well to form a paste.
（第５実施例）
この実施例は、超電導体Ｔ、ｌ！ ２−ｘＢ ａ２ Ｃ
ａ２Ｃ，ｕ ３Ｏ１０−ｙ （Ｘ ＝０．３．３’ ＝
０．４５＞の成型体どうしを接合した例である。以下第
５実施例を詳述する。(Fifth Example) In this example, superconductors T, l! 2-xB a2C
a2C, u 3O10-y (X = 0.3.3' =
This is an example in which molded bodies with a diameter of 0.45> are joined together. The fifth embodiment will be described in detail below.
＊接合対象の超電導体
臨界温度（Ｔｃ）が１１０にのＴ ｐ２−Ｘ Ｂ ａ
２ Ｃａ２ Ｃｕ ３ ｏｌｏ−ｙ （Ｘ ＝（）、３
、ｙ ＝０．４５＞の半インチベレット。*T p2-X B a when the critical temperature (Tc) of the superconductor to be bonded is 110
2 Ca2 Cu 3 olo-y (X = (), 3
, y = 0.45> half-inch pellet.
＊用いた接合剤
Ｐｂ３Ｏ４の粒径３μｍアンダー粉にＴ、ｌ！２Ｂａ２
Ｃａ２ Ｃｕ３Ｏ１ｏの３μｍアンダー粉を５０ｗｔ％
添加し、よく混合し、さらに、トルエン１０ｗｔ％をま
ぜてペースト状に形成したもの。*T, l! to the particle size 3μm under powder of the used bonding agent Pb3O4! 2Ba2
50wt% of 3μm under powder of Ca2Cu3O1o
Added, mixed well, and then mixed with 10 wt% toluene to form a paste.
上記接合剤を上記超電導体の接合面に、厚さ約１００μ
ｍ程度塗り付けた後、これを、８３Ｏ℃で１０時間焼結
した。Apply the above bonding agent to the bonding surface of the superconductor to a thickness of approximately 100 μm.
After applying the coating in a thickness of about m, this was sintered at 830° C. for 10 hours.
こうして接合した後、接合強度を測定したところ、０．
５ Ｋｇ／ｃｍ２であった。After bonding in this way, the bonding strength was measured and found to be 0.
It was 5 Kg/cm2.
また、この接合界面を四端子法で測定したところ、Ｔｃ
が１１０ Ｋの超電導特性を示すことが確認された。Furthermore, when this bonding interface was measured using the four-probe method, it was found that Tc
was confirmed to exhibit superconducting properties at 110 K.
なお、前記接合剤として、Ｐｂ３ｏ４の代わりにＰｂ、
Ｐ ｂ２０３ 、ＢＩＯ，Ｂｉ２０５もしくはＣｕ２Ｏ
を用いたものでもほぼ同様の結果が得られた。In addition, as the bonding agent, Pb, instead of Pb3o4,
P b203 , BIO, Bi205 or Cu2O
Almost similar results were obtained using .
（第６実施例）
この実施例は、用いた接合剤が異なるほかは前記第５実
施例と同一の構成及び作用効果を有するので、接合剤以
外の説明は省略する。(Sixth Embodiment) This embodiment has the same structure and effects as the fifth embodiment except for the difference in the bonding agent used, so explanations other than the bonding agent will be omitted.
＊用いた接合剤
Ｔ、１１２０３にＣｕＯをｓｏｗｔ％添加して混合し、
これに、さらに、Ｔ、Ｉ） ２Ｂａ２ Ｃａ２ Ｃｕ３
Ｏ１０の３μｍアンダー粉を前記混合物の全量の５０ｗ
ｔ％添加し、トルエンを加えてよく混合してペースト状
に形成したもの。* Add sowt% of CuO to the used bonding agent T, 11203 and mix it.
In addition, T, I) 2Ba2 Ca2 Cu3
Add 3μm under powder of O10 to 50w of the total amount of the mixture.
t% added, toluene added and mixed well to form a paste.
（比較例）
！よル較刊
臨界温度が９０にのＹＩ Ｂａ２ Ｃｕ３Ｏ７−ｘの超
電導体の半インチペレットの接合部に、Ｙ１Ｂａ２Ｃｕ
３Ｏ７−ｘの微粉３μｍアンダーの粉をトルエンでペー
スト状にして形成した接合剤を約１００μｍの厚さに塗
布し、接合部を突き合わせて９００℃で１０時間焼結し
た。(Comparative example)! At the junction of half-inch pellets of YI Ba2 Cu3O7-x superconductor whose critical temperature is 90, Y1Ba2Cu
A bonding agent made by paste-forming 3O7-x fine powder (under 3 μm) with toluene was applied to a thickness of about 100 μm, the joints were butted together, and sintered at 900° C. for 10 hours.
この場合の接合強度は０．０５Ｋ ｇ／ ｃ ｍ２以下
であった。The bonding strength in this case was 0.05K g/cm2 or less.
墓λ比致」
臨界温度が１００ Ｋｃｒ）Ｂ ｉ １．７ Ｐ ｂｏ
、３ Ｓ ｒ”２ Ｃａ２ Ｃｕ ３Ｏ１ｏの超電導体
の半インチペレットの接合部に、Ｂ ｉ ２ Ｓ ｒ
２ Ｃａ２ Ｃｕ３Ｏ１ｏの微粉３μｍアンダーの粉を
トルエンでペースト状にして形成した接合剤を約１００
μｍの厚さに塗布し、接合部を突き合わせて８３Ｏ℃で
１０時間焼結した。Critical temperature is 100 Kcr) B i 1.7 P bo
, 3 S r”2 Ca2 Cu 3O1o superconductor half-inch pellets, B i 2 S r
2. Approximately 100% of the bonding agent made by making a paste of Ca2Cu3O1o fine powder (under 3μm) with toluene.
It was applied to a thickness of μm, and the joints were butted together and sintered at 830° C. for 10 hours.
この場合の接合強度は０．１Ｋｇ／ｃｍ２以下であった
。The bonding strength in this case was 0.1 Kg/cm2 or less.
星１ル数正
臨界温度が１１０にのＴ、Ｑ ２−ｘ Ｂ ａ２ Ｃａ
２ Ｃｕ３Ｏ１０−ｙ （ｘ＝０．３ 、ｙ＝０．４５
＞の超電導体の半インチペレットの接合部に、Ｔ、Ｑ
２ Ｂ ａ、２ Ｃａ２Ｃｕ ３Ｏ１ｏの微粉３μｍア
ンダーの粉をトルエンでペースト状にして形成した接合
剤を約１００μｍの厚さに塗布し、接合部を突き合わせ
て８３Ｏ℃で１０時間焼結した。T, Q 2-x B a2 Ca with star 1 positive critical temperature of 110
2 Cu3O10-y (x=0.3, y=0.45
> T, Q at the junction of the half-inch pellet of superconductor
A bonding agent made by making a paste of 2Ba, 2Ca2Cu3O1o fine powder (under 3 μm thick) with toluene was applied to a thickness of about 100 μm, and the joints were butted together and sintered at 830° C. for 10 hours.
この場合の接合強度は０．１Ｋｇ／ｃｍ２以下であった
。The bonding strength in this case was 0.1 Kg/cm2 or less.
［発明の効果］
以上詳述したように、本発明は、接合剤として、超電導
体物質と、添加物質とを含むものを用い、この添加物質
を、前記超電導体物質と混合した場合に、この混合物の
焼結温度を該超電導体物質単独における焼結温度よりも
低くするような物質であり、かつ、接合対象たる超電導
体中に拡散した場合にもこの超電導体の超電導性を破壊
しない物質で構成したもので、これにより、焼結の際に
接合対象たる超電導体を歪ませたり変形させたり、ある
いは、超電導性を破壊したりするおそれを除去するとと
もに、前記添加物質が接合対象たる超電導体中に拡散し
てもこの移動によって生ずる空洞が超電導電流を阻害す
る程大きくなることがないようにし、接合部においても
超電導性を確保しつつ十分な接合強度を得ることを可能
にしたものである。[Effects of the Invention] As detailed above, the present invention uses a bonding agent containing a superconductor material and an additive material, and when this additive material is mixed with the superconductor material, A substance that makes the sintering temperature of the mixture lower than the sintering temperature of the superconductor material alone, and that does not destroy the superconductivity of the superconductor even if it diffuses into the superconductor to be bonded. This eliminates the risk of distorting or deforming the superconductor to be joined during sintering, or destroying the superconductivity, and also eliminates the possibility that the additive substance will cause the superconductor to be joined to This prevents the cavity created by this movement from becoming large enough to inhibit superconducting current even if it diffuses inside, making it possible to obtain sufficient joint strength while ensuring superconductivity at the joint. .
第１図は本発明の第１実施例における接合剤の超電導体
の混合割合と接合強度との関係を示すグラフである。FIG. 1 is a graph showing the relationship between the mixing ratio of the superconductor in the bonding agent and the bonding strength in the first embodiment of the present invention.
Claims (3)
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｙ＿１Ｂａ＿２Ｃｕ＿３Ｏ＿７＿−＿ｘの組成を
有する超電導物質または該超電導物質Ｙ＿１Ｂａ＿２Ｃ
ｕ＿３Ｏ＿７＿−＿ｘにおけるＹもしくはＢａを他の元
素で置換した組成を有し、Ｙ＿１Ｂａ＿２Ｃｕ＿３Ｏ＿
７＿−＿ｘの組成を有する超電導物質と同一または類似
の結晶構造を有する超電導物質の成型体を用い、 前記接合剤として、前記接合すべき超電導体の成型体を
構成する超電導物質と同一または類似の超電導物質と、
添加物質としてＡｇＯもしくはＣｕ＿２Ｏのいずれか１
つまたはＡｇＯとＣｕ＿２Ｏとの双方を含むものを用い
ることを特徴とした超電導体の接合方法。(1) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. The superconductor to be bonded is a superconducting material having a composition of Y_1Ba_2Cu_3O_7_-_x or the superconducting material Y_1Ba_2C.
It has a composition in which Y or Ba in u_3O_7_-_x is replaced with another element, and Y_1Ba_2Cu_3O_
A molded body of a superconducting material having the same or similar crystal structure as a superconducting material having a composition of superconducting material,
Either AgO or Cu_2O as an additive substance
1. A method for joining superconductors, characterized in that a method for joining a superconductor is used, the method comprising using a material containing one or both of AgO and Cu_2O.
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｂｉ＿２＿−＿ｘＰｂ＿ｘ（Ｓｒ＿１＿−＿ｙＣ
ａ＿ｙ）＿４Ｃｕ＿３Ｏ＿ｘもしくはＢｉ＿２＿−＿ｘ
Ｐｂ＿ｘ（Ｓｒ＿１＿−＿ｙＣａ＿ｙ）＿３Ｃｕ＿２Ｏ
＿ｘの組成を有する超電導物質、または、これら超電導
物質の構成元素の一部を他の元素に置換した組成を有し
、これら超電導物質と同一または類似の結晶構造を有す
る超電導物質の成型体を用い、 前記接合剤として、前記接合すべき超電導体の成型体を
構成する超電導物質と同一または類似の超電導物質と、
添加物質としてＢｉＯ、Ｂｉ＿２Ｏ＿５、ＰｂＯ、Ｐｂ
＿２Ｏ＿３、Ｐｂ＿３Ｏ＿４、Ｔｌ＿２Ｏ＿３もしくは
Ｃｕ＿２Ｏのいずれか１つまたはＢｉＯ、Ｂｉ＿２Ｏ＿
５、ＰｂＯ、Ｐｂ＿２Ｏ＿３、Ｐｂ＿３Ｏ＿４、Ｔｌ＿
２Ｏ＿３もしくはＣｕ＿２Ｏのうちのいずれか２以上を
組み合わせたものとを含むものを用いることを特徴とし
た超電導体の接合方法。(2) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. The superconductor to be bonded is Bi_2_-_xPb_x(Sr_1_-_yC
a_y)_4Cu_3O_x or Bi_2_-_x
Pb_x(Sr_1_−_yCa_y)_3Cu_2O
Using a molded body of a superconducting material having a composition of , as the bonding agent, a superconducting material that is the same as or similar to the superconducting material constituting the molded body of the superconductor to be bonded;
BiO, Bi_2O_5, PbO, Pb as additive substances
Any one of _2O_3, Pb_3O_4, Tl_2O_3 or Cu_2O, or BiO, Bi_2O_
5, PbO, Pb_2O_3, Pb_3O_4, Tl_
A method for joining superconductors, characterized by using a method including a combination of two or more of 2O_3 and Cu_2O.
加物質とを含む接合剤を塗布し、これら接合面を突き合
わせて焼結することにより超電導体どうしを接合する超
電導体の接合方法であって、前記接合すべき超電導体と
して、Ｔｌ＿２＿−＿ｘ（Ｂａ＿１＿−＿ｙＣａ＿ｙ）
＿４Ｃｕ＿３Ｏ＿１＿０＿−＿ｚまたはＴｌ＿２＿−＿
ｘ（Ｂａ＿１＿−＿ｙＣａ＿ｙ）＿３Ｃｕ＿２Ｏ＿１＿
０＿−＿ｚの組成を有する超電導物質またはこれら組成
におけるＴｌ、ＢａもしくはＣａを他の元素で置換した
組成を有し、これらの組成を有する超電導物質と同一ま
たは類似の結晶構造を有する超電導物質の成型体を用い
、前記接合剤として、前記接合すべき超電導体の成型体
を構成する超電導物質と同一または類似の超電導物質と
、添加物質としてＢｉＯ、Ｂｉ＿２Ｏ＿５、ＰｂＯ、Ｐ
ｂ＿２Ｏ＿３、Ｐｂ＿３Ｏ＿４、Ｔｌ＿２Ｏ＿３もしく
はＣｕ＿２Ｏのいずれか１つまたはＢｉＯ、Ｂｉ＿２Ｏ
＿５、ＰｂＯ、Ｐｂ＿２Ｏ＿３、Ｐｂ＿３Ｏ＿４、Ｔｌ
＿２Ｏ＿３もしくはＣｕ＿２Ｏのうちのいずれか２以上
を組み合わせたものとを含むものを用いることを特徴と
した超電導体の接合方法。(3) A method of joining superconductors in which a bonding agent containing a superconducting substance and an additive substance is applied to the joining surfaces of the superconductors to be joined, and the joining surfaces are brought together and sintered to join the superconductors together. Therefore, as the superconductor to be bonded, Tl_2_-_x(Ba_1_-_yCa_y)
_4Cu_3O_1_0_-_z or Tl_2_-_
x(Ba_1_−_yCa_y)_3Cu_2O_1_
Molding of a superconducting material having a composition of 0_-_z or a superconducting material having a composition in which Tl, Ba or Ca in these compositions is replaced with other elements and having the same or similar crystal structure as a superconducting material having these compositions The bonding agent is a superconducting material that is the same as or similar to the superconducting material constituting the molded body of the superconductor to be bonded, and the additive substances are BiO, Bi_2O_5, PbO, P.
Any one of b_2O_3, Pb_3O_4, Tl_2O_3 or Cu_2O, or BiO, Bi_2O
_5, PbO, Pb_2O_3, Pb_3O_4, Tl
A method for joining superconductors, characterized by using a combination of two or more of _2O_3 and Cu_2O.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1123269A JP2806390B2 (en) | 1989-05-17 | 1989-05-17 | Superconductor joining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1123269A JP2806390B2 (en) | 1989-05-17 | 1989-05-17 | Superconductor joining method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02302380A true JPH02302380A (en) | 1990-12-14 |
| JP2806390B2 JP2806390B2 (en) | 1998-09-30 |
Family
ID=14856383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1123269A Expired - Fee Related JP2806390B2 (en) | 1989-05-17 | 1989-05-17 | Superconductor joining method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2806390B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63256574A (en) * | 1987-04-10 | 1988-10-24 | Sumitomo Electric Ind Ltd | Process for bonding ceramic superconductive material |
| JPH01103965A (en) * | 1987-10-16 | 1989-04-21 | Nikkiso Co Ltd | Method for bonding superconductive materials |
| JPH02296778A (en) * | 1989-05-12 | 1990-12-07 | Ngk Insulators Ltd | Production of ceramic superconductor |
-
1989
- 1989-05-17 JP JP1123269A patent/JP2806390B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63256574A (en) * | 1987-04-10 | 1988-10-24 | Sumitomo Electric Ind Ltd | Process for bonding ceramic superconductive material |
| JPH01103965A (en) * | 1987-10-16 | 1989-04-21 | Nikkiso Co Ltd | Method for bonding superconductive materials |
| JPH02296778A (en) * | 1989-05-12 | 1990-12-07 | Ngk Insulators Ltd | Production of ceramic superconductor |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2806390B2 (en) | 1998-09-30 |
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