JP2008050190A - テープ状Re系(123)超電導体の製造方法。 - Google Patents
テープ状Re系(123)超電導体の製造方法。 Download PDFInfo
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- C01G3/00—Compounds of copper
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Abstract
【解決手段】MOD法により基板上にRe系(123)超電導体を製造する際に、Re、Ba及びCuのモル比をRe:Ba:Cu=1:X:3としたときにX<2の範囲内のBaモル比(好ましくは1.0≦X≦1.8、より好ましくは1.3≦X≦1.7)の原料溶液を用いることにより、Jc=3.20MA/cm2、Ic=525A/cm(X=1.5)の超電導特性を有する厚膜のテープ状超電導体の製造が可能になる。
【選択図】図1
Description
MOD法における上記の問題を解決するために、炭酸塩を経由せずにRe系(123)超電導体を形成する方法として、フッ素を含む有機酸塩(例えば、TFA塩:トリフルオロ酢酸塩)を出発原料とし、水蒸気雰囲気中の水蒸気分圧の制御下で熱処理を行い、フッ化物の分解を経由して超電導体を得る方法が近年精力的に行われている。
この傾向は、塗布と仮焼熱処理を繰り返して多層構造の酸化物超電導前駆体膜を形成して厚膜化する場合に著しくなる。その結果、得られた前駆体厚膜を結晶化し超電導膜を得る際にクラックがそのままの状態で残存するため、通電時の電流経路を阻害してしまうことによりJc特性は著しく低下する。
上記の中間層は、バッファ層としての機能を有し、超電導層との反応を抑制して超電導特性の低下を防止し、超電導層との整合性を維持するために配置される。
上記の中間層としては、例えば、第1中間層としてMOD法等により形成されたA2Zr2O7膜(ここでAは、Ce、GdまたはSmのいずれか1種を示す。)が、第2中間層としてMOD法、CVD法又はパルス蒸着法等により形成されたCeO2膜またはCe―Gd−O膜からなるものが用いられる。
基板として、ハステロイテープ上に0.7μm厚さのGd2Zr2O7から成る第1中間層及び0.4μm厚さのCeO2からなる第2中間層を順次形成した複合基板を用いた。この場合の第2中間層CeO2のΔφは、4.1°であった。
酸素分圧0.1%のアルゴンガス雰囲気中で5℃/minの昇温速度で760℃の焼成温度まで加熱し、この温度で200min保持した後、炉冷することにより施した。
YBCO(YBa2Cu3OY)の(005)面のピーク値=189751cps、Δφ=4.12deg、Δω=1.59deg、∫ω=38775の値が得られた。
実施例1と同一の複合基板を用い、Yのトリフルオロ酢酸塩(Y−TFA)、Baのトリフルオロ酢酸塩(Ba―TFA)及びCuのナフテン酸塩をY:Ba:Cuのモル比が1:1.8:3となるように混合し、2−オクタノン中に金属含有量が1.2mol/リットルの濃度に溶解して原料溶液を作成した。この原料溶液の粘度は78.3cPであった。
μmであり、その臨界電流密度及び臨界電流値を測定した結果、Jc=2.13MA/cm2、Ic=320A/cmの結果が得られた。
YBCO(YBa2Cu3OY)の(005)面のピーク値=182099cps、Δφ=4.31deg、Δω=1.46deg、∫ω=38545の値が得られた。
実施例1と同一の複合基板を用い、Yのトリフルオロ酢酸塩(Y−TFA)、Baのトリフルオロ酢酸塩(Ba―TFA)及びCuのナフテン酸塩をY:Ba:Cuのモル比が1:1.0:3となるように混合し、2−オクタノン中に金属含有量が1.2mol/リットルの濃度に溶解して原料溶液を作成した。この原料溶液の粘度は79.7cPであった。
MA/cm2、Ic=280A/cmの結果が得られた。
YBCO(YBa2Cu3OY)の(005)面のピーク値=181121cps、Δφ=4,33deg、Δω=1,58deg、∫ω=37639の値が得られた。
実施例1と同一の複合基板を用い、Yのトリフルオロ酢酸塩(Y−TFA)、Baのトリフルオロ酢酸塩(Ba―TFA)及びCuのナフテン酸塩をY:Ba:Cuのモル比が1:2.0:3(標準組成)となるように混合し、2−オクタノン中に金属含有量が1.2mol/リットルの濃度に溶解して原料溶液を作成した。この原料溶液の粘度は70.7cPであった。
YBCO(YBa2Cu3OY)の(005)面のピーク値=179086cps、Δφ=4.12deg、Δω=1.47deg、∫ω=20902の値が得られた。
実施例1と同一の複合基板を用い、Yのトリフルオロ酢酸塩(Y−TFA)、Baのトリフルオロ酢酸塩(Ba―TFA)及びCuのナフテン酸塩をY:Ba:Cuのモル比が1:2.2:3となるように混合し、2−オクタノン中に金属含有量が1.2mol/リットルの濃度に溶解して原料溶液を作成した。この原料溶液の粘度は70.7cPであった。
MA/cm2、Ic=245A/cmの結果が得られた。
YBCO(YBa2Cu3OY)の(005)面のピーク値=158745cps、Δφ=4,23deg、Δω=1,56deg、∫ω=37456の値が得られた。
実施例1と同一の複合基板を用い、Yのトリフルオロ酢酸塩(Y−TFA)、Baのトリフルオロ酢酸塩(Ba―TFA)及びCuのナフテン酸塩をY:Ba:Cuのモル比が1:2.5:3となるように混合し、2−オクタノン中に金属含有量が1.2mol/リットルの濃度に溶解して原料溶液を作成した。この原料溶液の粘度は60.5cPであった。
MA/cm2、Ic=144A/cmの結果が得られた。
YBCO(YBa2Cu3OY)の(005)面のピーク値=141528cps、Δφ=5.29deg、Δω=1.68deg、∫ω=17975の値が得られた。
結晶の面内配向度とa―b面内の結晶方位の配向度はそれ程の差異はないが、Jcは実施例1では3.20MA/cm2(Ic=525A/cm)、比較例1ではJc=2.58MA/cm2(Ic=307A/cm)と大きな差異がある。これは、比較例1においては、Y(123)超電導体の結晶粒の粒界に余剰のBaをベースとする不純物の析出とクラックの発生により結晶粒間の電気的接合性を低下させる結果と考えられ、従って、Baのモル比が比較例2(Baのモル比=2.2)及び比較例3(Baのモル比=2.5)とより高くなるに従って急激にJcが低下する。
1a 2軸配向性基板
1b 第1中間層
1c 第2中間層
2 Re系(123)超電導層
3 安定化層
10 テープ状Re系(123)超電導体
Claims (7)
- 基板上に、Re系(123)超電導体(ReBa2Cu3OY、ここでRe=Y、Nd、Sm、Gd、Eu,Yb、Pr又はHpから選択された少なくとも1種以上の元素を示す。)を構成する金属元素を含む原料溶液を塗布した後、仮焼熱処理を施し、次いで超電導体生成の熱処理を施すことによりRe系(123)超電導体を製造する方法において、前記原料溶液中のRe、Ba及びCuのモル比をRe:Ba:Cu=1:X:3としたときにX<2の範囲内のBaモル比の原料溶液を用いることを特徴とするテープ状Re系(123)超電導体の製造方法。
- 原料溶液中のBaモル比は1.0≦X≦1.8であることを特徴とする請求項1記載のテープ状Re系(123)超電導体の製造方法。
- 原料溶液中のBaモル比は1.3≦X≦1.7であることを特徴とする請求項1記載のテープ状Re系(123)超電導体の製造方法。
- 原料溶液は、有機溶媒とトリフルオロ酢酸塩、ナフテン酸塩、オクチルサン酸塩、ネオデカン酸塩、イソノナン酸塩または三酢酸塩のいずれか1種以上を含む混合溶液からなることを特徴とする請求項1乃至3いずれか1項記載のテープ状Re系(123)超電導体の製造方法。
- 原料溶液は、有機溶媒とフッ素を含むY―TFA塩(トリフルオロ酢酸塩)、Ba―TFA塩及びCuのナフテン酸塩の混合溶液からなることを特徴とする請求項4記載のテープ状Re系(123)超電導体の製造方法。
- 基板は、2軸配向性基板であることを特徴とする請求項1乃至5いずれか1項記載のテープ状Re系(123)超電導体の製造方法。
- 基板は、2軸配向性基板の上に高配向性の中間層を形成した複合基板であることを特徴とする請求項1乃至5いずれか1項記載のテープ状Re系(123)超電導体の製造方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006226421A JP4643522B2 (ja) | 2006-08-23 | 2006-08-23 | テープ状厚膜ybco超電導体の製造方法 |
KR1020097003474A KR101087211B1 (ko) | 2006-08-23 | 2007-06-12 | 테이프 상 후막 Re계 (123) 초전도체의 제조 방법 |
CN2007800313451A CN101506100B (zh) | 2006-08-23 | 2007-06-12 | 带状Re系(123)超导体的制造方法 |
PCT/JP2007/000623 WO2008023454A1 (en) | 2006-08-23 | 2007-06-12 | MANUFACTURING METHOD OF TAPE-SHAPED Re-BASE (123) SUPERCONDUCTOR |
EP07766933A EP2055677A4 (en) | 2006-08-23 | 2007-06-12 | METHOD OF MAKING BANDED REBASIS (123) SUPERSISTERS |
US12/376,099 US20090270263A1 (en) | 2006-08-23 | 2007-06-12 | PROCESS FOR PRODUCING TAPE-SHAPED Re-TYPE (123) SUPERCONDUCTOR |
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Cited By (7)
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JP2008137833A (ja) * | 2006-11-30 | 2008-06-19 | Toshiba Corp | 酸化物超電導体およびその製造方法 |
WO2009087720A1 (ja) * | 2008-01-08 | 2009-07-16 | International Superconductivity Technology Center, The Juridical Foundation | Re系酸化物超電導線材及びその製造方法 |
WO2010084553A1 (ja) * | 2009-01-23 | 2010-07-29 | パナソニック株式会社 | 無線中継装置及び無線中継システム |
JP2011146292A (ja) * | 2010-01-15 | 2011-07-28 | Swcc Showa Cable Systems Co Ltd | 酸化物超電導電流リード |
JP2011170999A (ja) * | 2010-02-16 | 2011-09-01 | Swcc Showa Cable Systems Co Ltd | 酸化物超電導線材の製造方法 |
WO2012161233A1 (ja) * | 2011-05-23 | 2012-11-29 | 古河電気工業株式会社 | 酸化物超電導薄膜 |
JP2013006759A (ja) * | 2011-05-23 | 2013-01-10 | Furukawa Electric Co Ltd:The | 酸化物超電導薄膜 |
Families Citing this family (7)
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JP5427553B2 (ja) * | 2009-10-30 | 2014-02-26 | 公益財団法人国際超電導産業技術研究センター | 酸化物超電導導体用基材及びその製造方法と酸化物超電導導体及びその製造方法 |
JP5757718B2 (ja) * | 2010-10-27 | 2015-07-29 | 公益財団法人国際超電導産業技術研究センター | 酸化物超電導線材の製造方法 |
CN103959401B (zh) * | 2011-11-21 | 2016-11-02 | 株式会社藤仓 | 氧化物超导电线材及其制造方法、超导电线圈和超导电缆 |
EP3176793A4 (en) * | 2014-11-05 | 2018-04-11 | Fujikura Ltd. | Oxide superconductor, superconducting wire, and manufacturing method therefor |
JP6556674B2 (ja) * | 2016-08-10 | 2019-08-07 | 株式会社東芝 | 酸化物超電導体及びその製造方法 |
CN107768018B (zh) | 2016-08-23 | 2019-03-12 | 株式会社东芝 | 氧化物超导体及其制造方法 |
US10541073B2 (en) * | 2016-08-31 | 2020-01-21 | Kabushiki Kaisha Toshiba | Superconducting coil and superconducting device |
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CA1328242C (en) * | 1987-05-18 | 1994-04-05 | Nobuhiko Fujita | Process for manufacturing a superconductor and a method for producing a superconducting circuit |
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JP2003300726A (ja) | 2002-04-08 | 2003-10-21 | Internatl Superconductivity Technology Center | テープ状酸化物超電導体及びその製造方法 |
JP2003034527A (ja) | 2001-05-15 | 2003-02-07 | Internatl Superconductivity Technology Center | 厚膜テープ状酸化物超電導体及びその製造方法 |
JP2003059352A (ja) * | 2001-08-22 | 2003-02-28 | Internatl Superconductivity Technology Center | 表面が平坦な高温超電導体膜 |
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- 2007-06-12 US US12/376,099 patent/US20090270263A1/en not_active Abandoned
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008137833A (ja) * | 2006-11-30 | 2008-06-19 | Toshiba Corp | 酸化物超電導体およびその製造方法 |
JP4738322B2 (ja) * | 2006-11-30 | 2011-08-03 | 株式会社東芝 | 酸化物超電導体およびその製造方法 |
WO2009087720A1 (ja) * | 2008-01-08 | 2009-07-16 | International Superconductivity Technology Center, The Juridical Foundation | Re系酸化物超電導線材及びその製造方法 |
WO2010084553A1 (ja) * | 2009-01-23 | 2010-07-29 | パナソニック株式会社 | 無線中継装置及び無線中継システム |
JP2011146292A (ja) * | 2010-01-15 | 2011-07-28 | Swcc Showa Cable Systems Co Ltd | 酸化物超電導電流リード |
JP2011170999A (ja) * | 2010-02-16 | 2011-09-01 | Swcc Showa Cable Systems Co Ltd | 酸化物超電導線材の製造方法 |
WO2012161233A1 (ja) * | 2011-05-23 | 2012-11-29 | 古河電気工業株式会社 | 酸化物超電導薄膜 |
JP2013006759A (ja) * | 2011-05-23 | 2013-01-10 | Furukawa Electric Co Ltd:The | 酸化物超電導薄膜 |
Also Published As
Publication number | Publication date |
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EP2055677A1 (en) | 2009-05-06 |
KR20090046848A (ko) | 2009-05-11 |
KR101087211B1 (ko) | 2011-11-29 |
WO2008023454A1 (en) | 2008-02-28 |
JP4643522B2 (ja) | 2011-03-02 |
CN101506100B (zh) | 2012-12-19 |
CN101506100A (zh) | 2009-08-12 |
US20090270263A1 (en) | 2009-10-29 |
EP2055677A4 (en) | 2012-12-05 |
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