JP5229868B2 - MgB2超伝導線材の製造方法 - Google Patents
MgB2超伝導線材の製造方法 Download PDFInfo
- Publication number
- JP5229868B2 JP5229868B2 JP2007542601A JP2007542601A JP5229868B2 JP 5229868 B2 JP5229868 B2 JP 5229868B2 JP 2007542601 A JP2007542601 A JP 2007542601A JP 2007542601 A JP2007542601 A JP 2007542601A JP 5229868 B2 JP5229868 B2 JP 5229868B2
- Authority
- JP
- Japan
- Prior art keywords
- mgb
- wire
- powder
- superconducting wire
- tube
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B35/00—Boron; Compounds thereof
- C01B35/02—Boron; Borides
- C01B35/04—Metal borides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
- C04B35/5805—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides
- C04B35/58057—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on borides based on magnesium boride, e.g. MgB2
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/01—Manufacture or treatment
- H10N60/0856—Manufacture or treatment of devices comprising metal borides, e.g. MgB2
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/40—Metallic constituents or additives not added as binding phase
- C04B2235/401—Alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/421—Boron
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
- C04B2235/422—Carbon
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S505/00—Superconductor technology: apparatus, material, process
- Y10S505/70—High TC, above 30 k, superconducting device, article, or structured stock
- Y10S505/704—Wire, fiber, or cable
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49014—Superconductor
Description
また、ベンゼン、トルエン、キシレン、ナフタレン、ペリレン、アントラセン等の芳香族化合物粉末などが代表的なものとして挙げられる。たとえば、SiCやInの粉末を混合する場合には、平均粒径が100μm程度以下、より好ましくは10nm〜1μm程度以下のものを、2.5〜35mol%、より好ましくは10〜25mol%程度添加することができる。粉末を添加するタイミングは、ex-situプロセスで線材作製を行う前であれば、MgB2の作製時に出発原料に混ぜても、MgB2の作製後に混ぜても構わないが、より大きな効果を得るためには、炭素を含有する化合物は、MgB2の作製時に出発原料に混ぜるのが好ましく、Inのような遷移金属は、作製後のMgB2粉体と混合するのが好ましい。このようなSiC粉末等の添加により、上記のMgB2超伝導線材への加熱処理を行わなくても、MgB2超伝導線材のJc特性をさらに高めることが可能となる。すなわち、管としてMgB2と反応する材料を使用した場合には、たとえばSiCやIn粉末を混合したMgB2超伝導体の粉体を用いることで、追加熱処理無しに線材の高性能化を図ることができる。
図2に示した工程図に沿って、MgB2線材を製造した。まず、市販のMgH2粉末(アボガド社,325メッシュ,純度96%)とB粉末(アルドリッチ社,325メッシュ,純度99.99%)を1:2のモル比で混合して得た混合粉末を、外径6.02mm,内径3.5mmの鉄管(シース材)に充填し、溝ロール加工と平ロール圧延により幅5mm,厚さ0.5mmのテープ状に加工した。この線材をアルミナボートに置き、チタン粉末で完全に覆った後、管状炉を用いてアルゴン雰囲気中で、600℃、1時間の熱処理を行った。すなわち、従来のin-situプロセスによるMgB2線材の製造工程と同様の操作を行った。これによって得られたMgB2線材を線材(1)とする。
実施例1の線材(2)および(3)に600℃の加熱処理を施し、それぞれ線材(4)および(5)を得た。また実施例1と同様のMgH2粉末とB粉末の混合粉末に7.5mol%のSiCナノパウダーを添加し、後は線材(4)と同様の工程で線材(6)を得た。なお、このSiCナノパウダーは、アルドリッチ社,φ約60nm,純度99.99%のものであった。
実施例1および2と同様の、この出願の発明の線材(2)(4)および従来のin-situ
プロセスによる線材(1)、ex-situプロセスによる線材(3)(5)を試料とし、これらの結晶性をX線解析により調べ、その結果を図6に示した。また、各試料の電気抵抗率の温度依存性をAC磁場強度を変えて測定することで、超伝導転移のAC磁場依存性について調べ、その結果をそれぞれ図7に示した。
実施例1の線材(1)より得られたMgB2粉末、または従来のex-situプロセスで使用するMgB2粉末を同形状のAl管(シース材)に充填し、線材加工することで、この出願の発明のAlシースMgB2線材(7)および従来法によるAlシースMgB2線材(8)を得た。
実施例2における7.5mol%のSiCパウダー添加した原料粉を用いて製造した本願発明の線材(6)と同様にして、SiC10mol%添加した線材としたものを、(6)に施した熱処理温度より高温の700℃で加熱処理し、本願発明の線材(9)として製造した。
in-situ線材(1) 16.2T
ex-situ線材(従来法)(5) 13.8T
ex-situ線材(新手法)(4) 18.2T
ex-situ線材(新手法、SiC添加)(9) 20.2T
となり、本願発明の線材(4)(9)の不可逆磁場が従来法で作製したもの(5)やin-situ線材(1)よりも優れていることがわかる。
本願発明の線材(2)の原料となるMgB2粉末にIn(10mol%)を添加し、線材(4)の作製時と同様に600℃で加熱して、本願発明の線材(10)を製造した。
本願発明の線材について、熱処理条件による効果を評価した。
Claims (12)
- MgB2超伝導体の粉体として、マグネシウム(Mg)あるいは水素化マグネシウム(MgH2)とホウ素(B)を0.9:2〜1.1:2の範囲で混合し、
前記混合によって得られる混合粉末を第1の管に充填、線材加工した後に加熱処理を行うことで得られるMgB2超伝導体を粉体化し、
前記粉体化によって得られたMgB2超伝導体の粉体を第2の管に充填して線材加工するMgB2超伝導線材の製造方法。 - 前記混合粉末に添加物として炭素(C)含有のセラミック、遷移金属または芳香族有機化合物の粉末を混合する、請求項1に記載のMgB2超伝導線材の製造方法。
- 前記添加物としてSiC、またはIn(インジウム)粉末を用いる、請求項2に記載のMgB2超伝導線材の製造方法。
- 前記第2の管が、Fe,Cu,Al,Nb,Ti,Mg,Ag,Au,Liの何れか1種または2種以上の元素を含有する金属管である、請求項1ないし3のいずれかに記載のMgB2超伝導線材の製造方法。
- 前記第1の管と前記第2の管の少なくとも一方がFe管である、請求項1ないし4のいずれかに記載のMgB2超伝導線材の製造方法。
- 前記第2の管がAl管である、請求項1ないし5のいずれかに記載のMgB2超伝導線材の製造方法。
- 前記MgB2超伝導体の粉体を充填した前記第2の管を複数本束ねて多芯線に線材加工する、請求項1ないし6のいずれかに記載のMgB2超伝導線材の製造方法。
- 前記MgB2超伝導体の粉体を充填した前記第2の管を線材加工した後、加熱処理する、請求項1ないし7のいずれかに記載のMgB2超伝導線材の製造方法。
- シース材としてのAlに被覆された長尺のMgB2であって、10T,4.2Kにおける臨界電流密度(Jc)が900A/cm2以上である、MgB2超伝導線材。
- 前記MgB2にはSiC、またはIn(インジウム)粉末が添加されている、請求項9に記載のMgB2超伝導線材。
- 前記シース材に被覆された長尺のMgB2が多数本束になった多芯線である、請求項9または10に記載のMgB2超伝導線材。
- 請求項9ないし11のいずれかに記載のMgB2超伝導線材が用いられている物品。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007542601A JP5229868B2 (ja) | 2005-10-24 | 2006-10-24 | MgB2超伝導線材の製造方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005309131 | 2005-10-24 | ||
JP2005309131 | 2005-10-24 | ||
PCT/JP2006/321174 WO2007049623A1 (ja) | 2005-10-24 | 2006-10-24 | MgB2超伝導線材の製造方法 |
JP2007542601A JP5229868B2 (ja) | 2005-10-24 | 2006-10-24 | MgB2超伝導線材の製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPWO2007049623A1 JPWO2007049623A1 (ja) | 2009-04-30 |
JP5229868B2 true JP5229868B2 (ja) | 2013-07-03 |
Family
ID=37967733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2007542601A Expired - Fee Related JP5229868B2 (ja) | 2005-10-24 | 2006-10-24 | MgB2超伝導線材の製造方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8173579B2 (ja) |
JP (1) | JP5229868B2 (ja) |
WO (1) | WO2007049623A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101759269B1 (ko) * | 2015-11-30 | 2017-07-19 | 한국기초과학지원연구원 | 고온초전도마그넷을 위한 지역절연권선 및 그 제조방법 |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008045858B4 (de) | 2008-09-05 | 2017-08-10 | H.C. Starck Gmbh | Reduktionsverfahren |
KR101212111B1 (ko) | 2010-06-10 | 2012-12-13 | 한국기계연구원 | 이붕소마그네슘 초전도 선재의 제조방법 및 이에 의하여 제조되는 이붕소마그네슘 초전도 선재 |
US8592346B2 (en) * | 2010-08-02 | 2013-11-26 | The Texas A&M University System | Textured powder wires |
JP2013093401A (ja) * | 2011-10-25 | 2013-05-16 | Hitachi Ltd | 超電導マグネット及びその製造方法 |
CN102543304B (zh) * | 2011-12-20 | 2013-07-31 | 东南大学 | 一种MgB2超导线材的制备方法 |
JP5889116B2 (ja) * | 2012-06-11 | 2016-03-22 | 株式会社日立製作所 | MgB2超電導線材およびその製造方法 |
US20140100118A1 (en) * | 2012-10-05 | 2014-04-10 | Hyper Tech Research, Inc. | Method for continuously forming superconducting wire and products therefrom |
JP5440678B1 (ja) * | 2012-11-15 | 2014-03-12 | 株式会社東京ワイヤー製作所 | 液体水素液面センサ用MgB2系超伝導線材、液体水素液面センサ及び液体水素用液面計 |
JP6161034B2 (ja) | 2013-12-17 | 2017-07-12 | 国立研究開発法人物質・材料研究機構 | MgB2超伝導体の製造方法およびMgB2超伝導体 |
US10431823B2 (en) | 2014-08-04 | 2019-10-01 | National Institute For Materials Science | Method for manufacturing base material powder having carbon nano-coating layer, method for manufacturing MgB2 superconductor using the method, MgB2 superconductor, method for manufacturing positive electrode material for lithium ion battery, lithium ion battery, and method for manufacturing photocatalyst |
CN104607643A (zh) * | 2014-12-25 | 2015-05-13 | 东南大学 | 一种中心镁扩散法制备单芯MgB2超导线材的方法 |
SK289044B6 (sk) | 2017-05-19 | 2023-02-22 | Ústav materiálov a mechaniky strojov SAV, v. v. i. | Supravodič na báze MgB2 s plášťom na báze Al a spôsob jeho výroby |
EP3503230A1 (en) | 2017-12-21 | 2019-06-26 | Abant Izzet Baysal Universitesi | Magnesium diboride superconducting wire with magnesium coated iron sheath and method of obtaining |
CN113707402B (zh) * | 2021-08-31 | 2022-06-07 | 西北有色金属研究院 | 一种MgB2超导螺线管线圈的制备方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002103716A1 (fr) * | 2001-06-15 | 2002-12-27 | Hitachi, Ltd. | Materiau de fil supraconducteur et son procede de preparation, aimant supraconducteur comprenant ce dernier |
JP2003331670A (ja) * | 2002-05-16 | 2003-11-21 | National Institute For Materials Science | MgB2超伝導線材の作製方法 |
JP2004111237A (ja) * | 2002-09-19 | 2004-04-08 | National Institute For Materials Science | MgB2超伝導線材とその製造方法 |
JP2005129412A (ja) * | 2003-10-24 | 2005-05-19 | National Institute For Materials Science | MgB2超電導線材とその製造方法。 |
JP2005310600A (ja) * | 2004-04-22 | 2005-11-04 | Tokyo Wire Works Ltd | MgB2線材の製造方法 |
JP2006143500A (ja) * | 2004-11-17 | 2006-06-08 | Yokohama National Univ | ナノ微粒子含有MgB2系高温超伝導体、及びその製造方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6687975B2 (en) * | 2001-03-09 | 2004-02-10 | Hyper Tech Research Inc. | Method for manufacturing MgB2 intermetallic superconductor wires |
US7018954B2 (en) * | 2001-03-09 | 2006-03-28 | American Superconductor Corporation | Processing of magnesium-boride superconductors |
JP4481584B2 (ja) * | 2003-04-11 | 2010-06-16 | 株式会社日立製作所 | 複合シースMgB2超電導線材およびその製造方法 |
-
2006
- 2006-10-24 WO PCT/JP2006/321174 patent/WO2007049623A1/ja active Application Filing
- 2006-10-24 US US12/084,035 patent/US8173579B2/en not_active Expired - Fee Related
- 2006-10-24 JP JP2007542601A patent/JP5229868B2/ja not_active Expired - Fee Related
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002103716A1 (fr) * | 2001-06-15 | 2002-12-27 | Hitachi, Ltd. | Materiau de fil supraconducteur et son procede de preparation, aimant supraconducteur comprenant ce dernier |
JP2003331670A (ja) * | 2002-05-16 | 2003-11-21 | National Institute For Materials Science | MgB2超伝導線材の作製方法 |
JP2004111237A (ja) * | 2002-09-19 | 2004-04-08 | National Institute For Materials Science | MgB2超伝導線材とその製造方法 |
JP2005129412A (ja) * | 2003-10-24 | 2005-05-19 | National Institute For Materials Science | MgB2超電導線材とその製造方法。 |
JP2005310600A (ja) * | 2004-04-22 | 2005-11-04 | Tokyo Wire Works Ltd | MgB2線材の製造方法 |
JP2006143500A (ja) * | 2004-11-17 | 2006-06-08 | Yokohama National Univ | ナノ微粒子含有MgB2系高温超伝導体、及びその製造方法 |
Non-Patent Citations (3)
Title |
---|
JPN6012053385; 松本明善,藤井宏樹,畠山秀夫,北口仁,熊倉浩明: 'PIT法による線材開発-高Jc線材の開発-' 低温工学 Vol.38,No.11, 20031125, p.609-614 * |
JPN7012004180; H.Kumakura,H.Kitaguchi,A.Matsumoto,and H.Hatakeyama: 'Upper critical fields of powder-in-tube-processed MgB2/Fe tape conductors' APPLIED PHYSICS LETTERS Vol.84,No.18, 20030420, p.3669-3671, AIP * |
JPN7012004181; S.X.Dou, S.Soltanian, J.Horvat, X.L.Wang, S.H.Zhou, M.Ionescu, and H.K.Liu: 'Enhancement of the critical current density and flux pinning of MgB2 superconcuctor by nanoparticle' APPLIED PHYSICS LETTERS Vol.81,No.18, 20021028, p.3419-3421, AIP * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101759269B1 (ko) * | 2015-11-30 | 2017-07-19 | 한국기초과학지원연구원 | 고온초전도마그넷을 위한 지역절연권선 및 그 제조방법 |
Also Published As
Publication number | Publication date |
---|---|
US20090156410A1 (en) | 2009-06-18 |
WO2007049623A1 (ja) | 2007-05-03 |
JPWO2007049623A1 (ja) | 2009-04-30 |
US8173579B2 (en) | 2012-05-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5229868B2 (ja) | MgB2超伝導線材の製造方法 | |
Ma et al. | Significantly enhanced critical current densities in MgB2 tapes made by a scaleable nanocarbon addition route | |
Hur et al. | Fabrication of high-performance MgB2 wires by an internal Mg diffusion process | |
US20050163644A1 (en) | Processing of magnesium-boride superconductor wires | |
Togano et al. | Fabrication of seven-core multi-filamentary MgB2 wires with high critical current density by an internal Mg diffusion process | |
JP5626658B2 (ja) | 鉄系超電導線材とその製造方法 | |
Kumakura et al. | Superconducting Properties of Diffusion-Processed Multifilamentary ${\rm MgB} _ {2} $ Wires | |
US9224937B2 (en) | Precursor of MgB2 superconducting wire, and method for producing the same | |
Kumakura | Development of high performance MgB2 tapes and wires | |
JP4055375B2 (ja) | 超電導線材とその作製方法及びそれを用いた超電導マグネット | |
Rafieazad et al. | Review on magnesium diboride (MgB2) as excellent superconductor: Effects of the production techniques on the superconducting properties | |
JP2008066168A (ja) | MgB2超伝導線材及びその製造法 | |
Krinitsina et al. | MgB 2-Based Superconductors: Structure and Properties | |
Qi et al. | Superconductivity in Ir-doped LaFe 1− x Ir x AsO | |
Tsapleva et al. | The Materials Science of Modern Technical Superconducting Materials | |
Choi et al. | Overview of MgB2 wires fabricated by Sam Dong Co., Ltd. | |
Sharma | Practical Magnesium Diboride (MgB2) Superconductor | |
JP3728504B2 (ja) | MgB2超伝導線材の作製方法 | |
Yamada et al. | Superconducting Properties and Structure of In-Situ MgB $ _ {2} $ Tapes With SiC and TiC Addition Prepared by Hot Pressing | |
JP4193194B2 (ja) | Nb3Sn超伝導線材の製造方法 | |
Liu et al. | Improved Superconducting Properties for Multifilament Graphene-Coated Nb Addition MgB 2 Wires by an Internal Mg Diffusion Process | |
Miryala | Development of MgB2 Superconducting Super-Magnets: Its Utilization towards Sustainable Development Goals | |
Hur et al. | High Critical Current Density ${\rm MgB} _ {2}/{\rm Fe} $ Multicore Wires Fabricated by an Internal Mg Diffusion Process | |
Viljamaa et al. | Comparison on Effects of ${\rm B} _ {4}{\rm C} $, ${\rm Al} _ {2}{\rm O} _ {3} $, and SiC Doping on Performance of ${\rm MgB} _ {2} $ Conductors | |
Tachikawa et al. | High-field performance and structure of (Nb, Ta)/sub 3/Sn superconductors produced by Ta-Sn core |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
RD04 | Notification of resignation of power of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7424 Effective date: 20090714 |
|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20091009 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20121023 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20121221 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20130129 |
|
A521 | Request for written amendment filed |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20130218 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20130312 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20130314 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20160329 Year of fee payment: 3 |
|
R150 | Certificate of patent or registration of utility model |
Ref document number: 5229868 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20160329 Year of fee payment: 3 |
|
S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |