JPH01160877A - Method for bonding oxide superconductor material - Google Patents
Method for bonding oxide superconductor materialInfo
- Publication number
- JPH01160877A JPH01160877A JP62317542A JP31754287A JPH01160877A JP H01160877 A JPH01160877 A JP H01160877A JP 62317542 A JP62317542 A JP 62317542A JP 31754287 A JP31754287 A JP 31754287A JP H01160877 A JPH01160877 A JP H01160877A
- Authority
- JP
- Japan
- Prior art keywords
- bonded
- superconducting
- oxide
- faces
- materials
- 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 40
- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002887 superconductor Substances 0.000 title 1
- 239000000843 powder Substances 0.000 claims abstract description 16
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 239000011812 mixed powder Substances 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 abstract description 13
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005245 sintering Methods 0.000 abstract description 2
- 230000002542 deteriorative effect Effects 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
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000005368 silicate glass Substances 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052916 barium silicate Inorganic materials 0.000 description 1
- HMOQPOVBDRFNIU-UHFFFAOYSA-N barium(2+);dioxido(oxo)silane Chemical compound [Ba+2].[O-][Si]([O-])=O HMOQPOVBDRFNIU-UHFFFAOYSA-N 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 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)
- Manufacturing Of Electrical Connectors (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
まま接合する酸化物超電導材料の接合方法に関する。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ＹＢａ２Ｃｕ３０．−Ｘに代表される酸化物が液体
窒素温度以上でも超電導を示し、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, YBa2Cu30. Oxides represented by -X exhibit superconductivity even above liquid nitrogen temperatures, and are 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得ようとしたり、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。(Problems to be Solved by the Invention) However, when attempting to obtain a larger and more complex shape by joining ceramics, or when attempting to obtain a composite shape by joining ceramics and single crystals, A mechanically strong bonding method that maintains superconducting 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 maintains superconducting properties and mechanically strengthens 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同一組成原料粉体
と酸化物超電導材料より低融点の酸化物粉体を介在させ
、酸化物超電導材料生成温度以下に加熱することにより
、接合しようとするものである。(Means for Solving the Problems) The present invention interposes a raw material powder of the same composition and an oxide powder having a lower melting point than the oxide superconducting material on the bonding surface of the oxide superconducting material, and lowers the temperature at which the oxide superconducting material forms. It is intended to be bonded by heating to .
（作用）
接合面に未反応の原料粉体と低融点の酸化物を含むため
、加熱処理を行うときこれらの粉体および粉体と基材と
の焼結反応を促進し、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
ることなく接合ができる。(Function) Since the bonding surface contains unreacted raw material powder and low melting point oxides, when heat treatment is performed, the sintering reaction between these powders and the powder and the base material is promoted and bonding becomes possible. can. 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 bonding is possible without deforming or altering the superconducting material that is the base material. can.
（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。組
成がＹＢａ２ＣＬＩ３０？−ｘであられされ、９５０’
Ｃで焼成して得た縦３１ＴＩＩ＋、横３ｍｍ、高さ２０
ｍｍの棒状の超電導セラミックス１および２の夫々の端
面の片面を研磨した。一方、ＹＢａ２Ｃｕ２Ｏ□−Ｘと
なるような成分比で、それぞれの平均粒子径が２卯のＹ
２Ｏ３、ＢａＣＯ３、ＣｕＯ粉体１９ｇと平均粒子径が
１ ２Ｏ ｐｍのＢｉ２Ｏ。(Example) An example of the present invention will be described below with reference to FIG. Is the composition YBa2CLI30? Hail to -x, 950'
31TII+ in length, 3mm in width, and 20 in height obtained by firing with C
One end face of each of the rod-shaped superconducting ceramics 1 and 2 of mm was polished. On the other hand, Y with a component ratio of YBa2Cu2O□-X and an average particle size of 2 μm each.
2O3, BaCO3, 19g of CuO powder and Bi2O with an average particle size of 12O pm.
粉体を１ｇとを乳鉢で混合したものを試料Ｎα１とした
。同様にして作成した、他の低融点の酸化物： Ｂ２．
０３．５ｂ２０３、ｐｂｏ、ケイ酸ソーダバリウムガラ
ス（Ａ Ｓ Ｆ ＆ ３０ Ｑ ）、ケイ酸鉛ガラス（
ＡＳＦ Ｎ［１１３８０）、ホウケイ酸鉛ガラス（ＡＳ
Ｆ Ｎα１５１０）との混合粉体を試料Ｎα２〜７とし
た。なお、ガラスはいずれも旭硝子製粉末ガラスである
。棒状のセラミックス１および２の研磨面の間にこの混
合粉の一部３を挟み、ＡＱ２０３セラミックス製接合治
具４にセットし、５０ｇのＺｒＯ□セラミックスのおも
り５をのせ酸素気流中で９００℃に５時間加熱し、５０
０℃で８時間アニールした。接合治具４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
素中で直流臨界電流Ｊｃを測定した。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。それらの結
果を第１表に示す。ちなみに接合していないセラミック
スの直流臨界電流は４５０Ａ／（！１７で、４点曲げ強
度は４３ＭＰａであった。Sample Nα1 was prepared by mixing 1 g of the powder in a mortar. Other low melting point oxides prepared in the same manner: B2.
03.5b203, pbo, barium silicate glass (A SF & 30 Q), lead silicate glass (
ASF N [11380), lead borosilicate glass (AS
Samples Nα2 to 7 were mixed powders with FNα1510). Note that all glasses are powdered glass manufactured by Asahi Glass. A portion of this mixed powder 3 was sandwiched between the polished surfaces of rod-shaped ceramics 1 and 2, set in an AQ203 ceramic bonding jig 4, a 50 g ZrO□ ceramic weight 5 was placed, and the mixture was heated to 900°C in an oxygen stream. Heat for 5 hours, 50
Annealing was performed at 0°C for 8 hours. A bonded sample was taken out from the bonding jig 4, silver electrodes were applied to both ends, lead wires were attached, and the DC critical current Jc was measured in liquid nitrogen. Thereafter, the mechanical strength of the same sample was measured by a four-point bending method. The results are shown in Table 1. Incidentally, the direct current critical current of the unbonded ceramic was 450 A/(!17), and the four-point bending strength was 43 MPa.
接合面に介在させる粉体のそれぞれの平均粒子径が１０
μｍ以上では接合面が多孔質となり、超電導状態で接合
されている機械的強度に弱くなり、実用的ではなくなる
。The average particle diameter of each powder interposed on the joint surface is 10
If it is larger than μm, the bonding surface becomes porous and the mechanical strength of bonding in a superconducting state becomes weak, making it impractical.
また、低融点の酸化物の量が１０ｗｔ％を越えると接合
面は非超電導材料が多くなり、超電導状態でなくなる。Furthermore, if the amount of the low melting point oxide exceeds 10 wt %, the bonding surface will have a large amount of non-superconducting material and will no longer be in a superconducting state.
一方、低融点酸化物の量が０．１ｔｙｔ％以下であれば
、接合処理温度を基材である超電導材料の作製温度と同
じにしなければならず基材である超電導材料の形状を著
しく変形させ、特性も変化させるので好ましくない。On the other hand, if the amount of low melting point oxide is 0.1 tyt% or less, the bonding treatment temperature must be the same as the manufacturing temperature of the superconducting material that is the base material, which may significantly deform the shape of the superconducting material that is the base material. , which is not preferable because it also changes the characteristics.
第 １ 表
前記実施例において製作した試料Ｎｎｌ、３．６，７お
よび８のそれぞれの混合粉体をそれぞれ９０ｗｔ％に、
ニトロセルローズのブチルカルピトールアセテート溶液
にトロセルローズ５ｗｔ％を含む） １０ｔｚｔ％を有
機バインダとして添加混合し、ロールミルで混練してペ
ースト状にしたにれらペーストの試料ＮαをそれぞれＮ
α８〜１２とした。これらペーストを超電導セラミック
スの接合面に筆で塗布し、実施例１と同様な方法で接合
した。但し、有機バインダを十分に蒸発させるため、焼
成工程において温度上昇させるとき４００℃で２時間保
持する工程をいれた。接合試料の直流臨界電流と４点曲
げ機械的強度のａＩす定結果を第１表に示す。第１表か
ら明らかなようにペースト状にして接合面に塗布するこ
とにより、超電導特性と機械的特性が向上する。Table 1 Each of the mixed powders of samples Nnl, 3.6, 7 and 8 produced in the above example was adjusted to 90 wt%,
Nitrocellulose (containing 5 wt% of trocellulose in butylcarpitol acetate solution) was added and mixed as an organic binder and kneaded with a roll mill to form a paste.
α8-12. These pastes were applied with a brush to the bonding surfaces of the superconducting ceramics, and bonding was carried out in the same manner as in Example 1. However, in order to sufficiently evaporate the organic binder, a step of holding the temperature at 400° C. for 2 hours was included when raising the temperature in the firing step. Table 1 shows the aI test results for the DC critical current and four-point bending mechanical strength of the bonded samples. As is clear from Table 1, superconducting properties and mechanical properties are improved by applying the paste to the joint surfaces.
本発明では超電導材料がＹＢａ２Ｃｕ、 Ｏ□−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。原料も実施例にある酸化物ある
いは炭酸化物に限定されるものではない。In the present invention, the superconducting material is not limited to YBa2Cu or O□-X, nor is the shape limited to ceramics. The raw materials are not limited to the oxides or carbonates shown in the examples.
さらに、低融点酸化物としてガラスは実施例のガラスに
限定されるものではない。Furthermore, the glass used as the low melting point oxide is not limited to the glass in the examples.
図は本発明の一実施例による接合方法を示す斜視図であ
る。
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代理人
弁理士 則 近 憲 佑
同 第子丸 健
平Ｉ吹補正書（方式）
％式％
１、事件の表示
８和６２ 年特許願第、３／７．ｆグ２号２、発明の名
称
酸化物超電導材料の接合方法
３、補正をする者
事件との関係 特許出願人
（３０７）株式会社 東芝
４、代理人
〒１０５
昭和６３年３月２９日（発送日）
６、補正の対象
■ 明細書の図面の簡単な説明の潤
７、補正の内容
■ 本願明細書の第８頁第４行目に記載の「図」を「第
１図」と訂正する。
■ 図面を別紙のとおり訂正する。
以上The figure is a perspective view showing a joining method according to an embodiment of the present invention. 2... Oxide superconducting material 3... Mixed powder 4...
・Joining jig 5... Ceramic weight agent
Patent attorney Noriyuki Chika Kenpei Daishimaru I blow amendment (method) % formula % 1. Indication of case 8wa 62 Patent Application No. 3/7. fg No. 2 2, Name of the invention Method for joining oxide superconducting materials 3, Relationship with the amended case Patent applicant (307) Toshiba Corporation 4, Agent 105 March 29, 1988 (shipped) 6. Subject of amendment ■ Brief explanation of drawings in the specification 7. Contents of amendment ■ "Figure" written in line 4 of page 8 of the specification of the present application is corrected to "Figure 1" . ■ Correct the drawing as shown in the attached sheet. that's all
Claims (5)
同一組成の原料粉体と酸化物超電導材料より低融点の酸
化物との混合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, a mixed powder of raw material powder of the same composition and an oxide with a lower melting point than the oxide superconducting material is interposed on the joint surface, and then oxide superconducting material is produced. A method for joining oxide superconducting materials, characterized by joining by heating below a temperature.
が１０μｍ以下であり、酸化物超電導材料の原料粉体が
９０〜９９．９ｗｔ％、低融点酸化物が０．１〜１０ｗ
ｔ％の混合物であ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 average particle diameter of each of the powders interposed on the joint surface is 10 μm or less, the raw material powder of the oxide superconducting material is 90 to 99.9 wt%, and the low melting point oxide is 0.1 to 10 wt%.
2. The method of joining oxide superconducting materials according to claim 1, wherein the oxide superconducting material is a mixture of t%.
、Ｓｂ＿２Ｏ＿３、ＰｂＯのうち少なくとも一種以上含
むことを特徴とする特許請求の範囲第２項記載の酸化物
超電導材料の接合方法。(3) Low melting point oxides are B_2O_3 and Bi_2O_3
, Sb_2O_3, and PbO.
特許請求の範囲第２項記載の酸化物超電導材料の接合方
法。(4) The method for joining oxide superconducting materials according to claim 2, wherein the low melting point oxide is glass.
加し、ペースト状にして接合面に塗布して用いることを
特徴とする特許請求の範囲第２項記載の酸化物超電導材
料の接合方法。(5) A method for joining oxide superconducting materials according to claim 2, characterized in that an organic binder is added to the mixed powder interposed on the joint surface, and the mixture is made into a paste and applied to the joint surface. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62317542A JPH01160877A (en) | 1987-12-17 | 1987-12-17 | Method for bonding oxide superconductor material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62317542A JPH01160877A (en) | 1987-12-17 | 1987-12-17 | Method for bonding oxide superconductor material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01160877A true JPH01160877A (en) | 1989-06-23 |
Family
ID=18089414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62317542A Pending JPH01160877A (en) | 1987-12-17 | 1987-12-17 | Method for bonding oxide superconductor material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01160877A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02296778A (en) * | 1989-05-12 | 1990-12-07 | Ngk Insulators Ltd | Production of ceramic superconductor |
| JPH038777A (en) * | 1989-03-30 | 1991-01-16 | Ngk Insulators Ltd | Bond structure of oxide superconductor |
| US6258754B1 (en) * | 1998-07-16 | 2001-07-10 | Superconductive Components, Inc. | Large, strongly linked superconducting monoliths and process for making the same |
| WO2003002483A1 (en) * | 2001-06-29 | 2003-01-09 | International Superconductivity Technology Center, The Juridical Foundation | Method of joining oxide superconductor and oxide superconductor joiner |
-
1987
- 1987-12-17 JP JP62317542A patent/JPH01160877A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH038777A (en) * | 1989-03-30 | 1991-01-16 | Ngk Insulators Ltd | Bond structure of oxide superconductor |
| JPH02296778A (en) * | 1989-05-12 | 1990-12-07 | Ngk Insulators Ltd | Production of ceramic superconductor |
| 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 |
| WO2003002483A1 (en) * | 2001-06-29 | 2003-01-09 | International Superconductivity Technology Center, The Juridical Foundation | Method of joining oxide superconductor and oxide superconductor joiner |
| US7001870B2 (en) | 2001-06-29 | 2006-02-21 | International Superconductivity Technology Center, The Juridical Foundation | Method for joining oxide superconductors and joined oxide superconductor |
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