JPH01157469A - Bonding of oxide superconducting material - Google Patents
Bonding of oxide superconducting materialInfo
- Publication number
- JPH01157469A JPH01157469A JP62315358A JP31535887A JPH01157469A JP H01157469 A JPH01157469 A JP H01157469A JP 62315358 A JP62315358 A JP 62315358A JP 31535887 A JP31535887 A JP 31535887A JP H01157469 A JPH01157469 A JP H01157469A
- Authority
- JP
- Japan
- Prior art keywords
- oxide superconducting
- superconducting material
- bonding
- temp
- compsn
- 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
- 239000000463 material Substances 0.000 title claims abstract description 36
- 239000000843 powder Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 6
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 abstract description 21
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract 2
- 229910003098 YBa2Cu3O7−x Inorganic materials 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 238000001354 calcination Methods 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000013001 point bending Methods 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Ceramic Products (AREA)
- Superconductor Devices And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は酸化物超電導材料同志を超電導特性を維持した
まま接合する方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a method for joining oxide superconducting materials together while maintaining their superconducting properties.
（従来の技術）
最近ＹＢａ、Ｃｕ３０□−Ｘに代表される酸化物が液体
窒素温度付近で超電導状態を示し、セラミックス、単結
晶、薄膜あるいは線材のような形状で得られている。(Prior Art) Recently, oxides represented by YBa and Cu30□-X exhibit a superconducting state near the temperature of liquid nitrogen, and have been obtained in the form of ceramics, single crystals, thin films, or wires.
（発明が解決しようとする問題点）
しかし、セラミックスとセラミックスとを接合してより
大きなかつ複雑な形状を作製したり、あるいは、セラミ
ックスと単結晶を接合して複合形状を得ようとするとき
超電導特性を維持しながら機械的にも強固な接合方法に
ついてはまだ開発されていない。(Problem to be solved by the invention) However, when bonding ceramics to create larger and more complex shapes, or bonding ceramics and single crystals to obtain composite shapes, superconducting A mechanically strong bonding method that maintains properties has not yet been developed.
本発明は超電導材料による複雑な形状物を超電導特性を
維持しながら機械的にも強固な酸化物超電導材料の接合
方法を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a method for joining oxide superconducting materials that are mechanically strong while maintaining superconducting properties of complex-shaped objects made of superconducting materials.
（問題点を解決するための手段）
本発明は酸化物超電導材料の接合面に微細な同一組成の
酸化物超電導材料の粉体を介在させ、酸化物超電導材料
生成温度以下に加熱することにより、接合をしようとす
るものである。(Means for Solving the Problems) The present invention interposes fine powder of oxide superconducting material having the same composition on the bonding surface of oxide superconducting materials, and by heating the powder to a temperature below the oxide superconducting material formation temperature, It is intended to join.
（作 用）
接合面に微細な同一組成の酸化物超電導材料の粉体を含
むため、加熱処理を行うときこの微細粉体と基材との焼
結反応が基材の焼結反応する温度より低温で開始され、
接合することができる。したがって、接合面には超電導
材料のセラミックスが接合面に沿って生成し、接合面に
おいて微細組織的にも超電導特性上も連続的で、基材で
ある超電導材料を変形や変質させることなく接合できる
。(Function) Because the joint surface contains fine powder of oxide superconducting material with the same composition, during heat treatment, the sintering reaction between this fine powder and the base material is higher than the temperature at which the base material sinters. Starts at low temperature,
Can be joined. Therefore, ceramics of the superconducting material is generated along the bonding surface, and the bonding surface is continuous in terms of microstructure and superconducting properties, and can be bonded without deforming or altering the superconducting material that is the base material. .
（実施例）
以下本発明の一実施例を第１図を参照して説明する０組
成がＹＢａ、Ｃｕ、Ｏ，−１であり、９５０℃で焼成し
て得た縦、横３ｍｍ、高さ２０＋＋ｎの棒状のセラミッ
クス１および２の夫々の端面の片面を研磨した。(Example) Hereinafter, an example of the present invention will be explained with reference to FIG. One end face of each of rod-shaped ceramics 1 and 2 of 20++n was polished.
一方、ＹＢａ２Ｃｕ、Ｏ，−１の平均粒子径が０．５．
の粉体を共沈法により用意した。棒状のセラミックス１
および２の研磨面の間にこの粉体３を挟み、ＡＱ２０３
セラミック製接合治具４にセットし、５０ｇめＺｒ○、
セラミックスのおもり５をのせ酸素気流中で９２０℃に
５時間加熱し、５００℃で８時間アニールした。接合治
具から接合試料を取出し、両端に銀電極を塗布しリード
線をつけ、液体窒素中で臨界電流を測定した。その結果
臨界電流は１５０Ａ／ｄであり、超電導状態で接合され
ていることが分った。ちなみに接合していない部分の臨
界電流は４５０Ａ／ｄ？であった。その後同一試料を４
点曲げ法により、機械的強度を測定したところ１３ＭＰ
ａであった。ちなみに接合していないセラミックスの４
点曲げ強度は４３ＭＰａであった。On the other hand, the average particle diameter of YBa2Cu,O,-1 is 0.5.
The powder was prepared by coprecipitation method. Rod-shaped ceramics 1
Sandwich this powder 3 between the polished surfaces of AQ203 and 2.
Set it in the ceramic joining jig 4, and add 50g Zr○,
A ceramic weight 5 was placed thereon and heated to 920°C for 5 hours in an oxygen stream, followed by annealing at 500°C for 8 hours. A bonded sample was taken out from the bonding jig, silver electrodes were applied to both ends, lead wires were attached, and the critical current was measured in liquid nitrogen. As a result, it was found that the critical current was 150 A/d, indicating that the bonding was in a superconducting state. By the way, the critical current of the unconnected part is 450A/d? Met. After that, the same sample was
The mechanical strength was measured using the point bending method and was 13MP.
It was a. By the way, 4 of the unbonded ceramics
The point bending strength was 43 MPa.
接合面に介在させる粉体の平均粒子径が１ｔｌｒａ以上
では焼結反応開始温度が基材の超電導セラミックスと同
じになり、基材である超電導材料の形状を変形させたり
、特性を変化させるので好ましくない。If the average particle size of the powder interposed at the joint surface is 1 tlra or more, the sintering reaction initiation temperature will be the same as that of the superconducting ceramic base material, which will deform the shape or change the characteristics of the superconducting material base material, which is preferable. do not have.
前記実施例において用意した棒状の超電導セラミックス
１および２で微細粉３を挟んだ試料を第２図に示すＡＱ
、０３セラミツクス製ホツトプレス治具６にセットした
。超電導セラミックスとホットプレス治具６との隙間に
はＺｒＯ２セラミック粉７をつめた。酸素雰囲気中で２
０ＭＰａの圧力をかけながら９００℃に加熱焼成した。AQ shown in FIG. 2 is a sample in which fine powder 3 is sandwiched between rod-shaped superconducting ceramics 1 and 2 prepared in the above example.
, 03 ceramics hot press jig 6 was set. The gap between the superconducting ceramic and the hot press jig 6 was filled with ZrO2 ceramic powder 7. 2 in oxygen atmosphere
It was heated and fired at 900° C. while applying a pressure of 0 MPa.
アニール後接合試料を取出し、臨界電流特性と機械的強
度を測定した。その結果臨界電流は２００ Ａ ／ ａ
Ｊであり、４点曲げ強度は２０ＭＰａであった。このよ
うに接合するときに圧力を印加することにより、より低
温で、より強固に接合することができる。After annealing, the bonded samples were taken out and their critical current characteristics and mechanical strength were measured. The resulting critical current is 200 A/a
J, and the four-point bending strength was 20 MPa. By applying pressure during bonding in this way, it is possible to bond more firmly at a lower temperature.
圧力が５０ＭＰａを超えると超電導セラミックスの変形
が著しくなるので好ましくない。If the pressure exceeds 50 MPa, the superconducting ceramic will be significantly deformed, which is not preferable.
本発明では超電導材料がＹＢａ、Ｃｕ、０ｔ−ｘに限定
されるものではなく、また形状もセラミックスに限定さ
れるものではない。In the present invention, the superconducting material is not limited to YBa, Cu, or 0t-x, and the shape is not limited to ceramics.
以上のように本発明によれば、酸化物超電導材料同志を
接合するときに、接合面に平均粒子径１μｓ以下の同一
組成の酸化物超電導材料の粉体を介在させた後、酸化物
超電導材料を生成温度以下に加熱して接合するようにし
たので、超電導材料による複雑な形状物を超電導特性を
維持しながら機械的にも強固な酸化物超電導材料の接合
方法を提供することができる。As described above, according to the present invention, when joining oxide superconducting materials together, after interposing powder of the oxide superconducting material of the same composition and having an average particle diameter of 1 μs or less on the joint surface, the oxide superconducting material Since the bonding is performed by heating the superconducting materials below the formation temperature, it is possible to provide a method for bonding mechanically strong oxide superconducting materials while maintaining the superconducting properties of complex-shaped objects made of superconducting materials.
第１図は本発明の一実施例による接合方法を示す斜視図
、第２図はホットプレス接合方法の例を示す断面図であ
る。
１．２・・・酸化物超電導材料、３・・・混合粉末。
４・・・接合治具、 ５・・・セラミック
ス製おもり、６・・・ホットプレス治具、 ７・・
・ＺｒＯ２セラミック粉、８・・・圧力を印加する゛方
向。
代理人 弁理士 則 近 憲 佑
同 第子丸 健
第１図
第２図FIG. 1 is a perspective view showing a joining method according to an embodiment of the present invention, and FIG. 2 is a sectional view showing an example of a hot press joining method. 1.2...Oxide superconducting material, 3...Mixed powder. 4... Joining jig, 5... Ceramic weight, 6... Hot press jig, 7...
・ZrO2 ceramic powder, 8... direction to apply pressure. Agent Patent Attorney Noriyuki Ken Yudo Daishimaru Ken Figure 1 Figure 2
Claims (2)
平均粒子径１μｍ以下の同一組成の酸化物超電導材料の
粉体を介在させた後、酸化物超電導材料の生成温度以下
に加熱して接合することを特徴とする酸化物超電導材料
の接合方法。(1) When joining oxide superconducting materials together, powder of oxide superconducting material of the same composition with an average particle diameter of 1 μm or less is interposed on the joining surface, and then heated to a temperature below the formation temperature of the oxide superconducting material. A method for joining oxide superconducting materials characterized by joining.
印加しながら接合することを特徴とする特許請求の範囲
第１項記載の酸化物超電導材料の接合方法。(2) The method for joining oxide superconducting materials according to claim 1, wherein the joining is performed while applying a surface pressure of 100 MPa or less when joining by heating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315358A JPH01157469A (en) | 1987-12-15 | 1987-12-15 | Bonding of oxide superconducting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62315358A JPH01157469A (en) | 1987-12-15 | 1987-12-15 | Bonding of oxide superconducting material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01157469A true JPH01157469A (en) | 1989-06-20 |
Family
ID=18064453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62315358A Pending JPH01157469A (en) | 1987-12-15 | 1987-12-15 | Bonding of oxide superconducting material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01157469A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020025A1 (en) * | 1992-04-03 | 1993-10-14 | Nippon Steel Corporation | Bonded element of superconductive oxide materials and its manufacture |
| US6258754B1 (en) * | 1998-07-16 | 2001-07-10 | Superconductive Components, Inc. | Large, strongly linked superconducting monoliths and process for making the same |
-
1987
- 1987-12-15 JP JP62315358A patent/JPH01157469A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993020025A1 (en) * | 1992-04-03 | 1993-10-14 | Nippon Steel Corporation | Bonded element of superconductive oxide materials and its manufacture |
| US5786304A (en) * | 1992-04-03 | 1998-07-28 | Nippon Steel Corporation | Joining product of oxide superconducting material and process for producing the same |
| US6258754B1 (en) * | 1998-07-16 | 2001-07-10 | Superconductive Components, Inc. | Large, strongly linked superconducting monoliths and process for making the same |
| US6429174B2 (en) * | 1998-07-16 | 2002-08-06 | Superconductive Components, Inc. | Large strongly linked superconducting monoliths and process for making the same |
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