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GROWTH OF Bi-2223 PHASE FROM TEXTURED Bi-2212 PHASE SOLIDIFIED IN HIGH MAGNETIC FIELDS

Research Project

Project/Area Number 13650799
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionAKITA UNIVERSITY

Principal Investigator

NAGATA Akihiko  FACULTY OF RESOURCE SCIENCE AND ENGINEERING, PROFESSOR, 工学資源学部, 教授 (20005945)

Co-Investigator(Kenkyū-buntansha) WATANABE Kazuo  INSTITUTE FOR MATERIALS RESEARCH, TOHOKU UNIVERSITY, PROFESSOR, 金属材料研究所, 教授 (30143027)
XIAO Yelu  FACULTY OF RESOURCE SCIENCE AND ENGINEERING, ASSOCIATE PROFESSOR, 工学資源学部, 助教授 (60292364)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsHIGH TEMPEATURE SUPER CONDUCTORS / Bi-BASED SUPERCONDUCTORS / MAGNETIC TEXTURING / SOLIDIFICATION / MICROSTRUCTURE CONTROL / Bi-2223 SUPERCONDUCTOR
Research Abstract

1) Effect of Ag_2O,MgO and B_2O_3 additions on microstructure and superconducting properties of Bi-2223 phase after solidification in high magnetic fields:
5%MgO and 5%Ag_2O additions improved the texture of Bi-2223 phase slightly after solidification in high magnetic fields but B2O3 addition never improved. MgO addition also improved the Jc value estimated from ΔM of hysteresis loop measured by VSM.
2) Texture and superconducting properties of Bi-2201 phase solidified in high magnetic fields:
Non-stoichiometric Bi-2201 phase were solidified in a magnetic field of 1OT. A Large, well c-axis aligned Bi-22O1 phase was obtained. As for the anisotropy, Jc flowed perpendicular to the applied magnetic field is about 10 times larger than that flowed parallel to it. On the contrary, no texture was observed in the Bi-22O1 sample solidified without a magnetic field.
3) Formation and texture of Bi-2223 phase during sintering in high magnetic fields:
Samples were sintered in the temperature range from 835 to 86O℃ in a magnetic field of 10T. Texturing of Bi-2223 phase was improved with increasing sintering temperature up to 855℃, however the volume fraction of Bi-2223 phase decreased with increasing sintering temperature. No Bi-2223 phase was observed after sintering at 860℃ where the liquid phase existed, but only well-aligned Bi-2212 phase was obtained.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] X.Y.Lu: "The texture and formation of (Bi, Pb)-2223 phase with Ag_2O, MgO and B_2O_3 additions after partial-melting and solidification in high magnetic fields"Adv. in Cryogenic Eng. ; Boc. ICMC. 48. 383-390 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu: "Crystal growth of Bi-2201 phase in high magnetic fields"Physica C. 382. 27-32 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 魯小葉: "磁場中凝固したBi-2223超伝導材料の組織とJc特性"日本金属学会誌. 66. 254-259 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu: "Formation and texture of Bi-2223 phase during sintering in high magnetic fields"Physica C. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu, et aL.: "The texture and formation of (Bi,Pb) phase with Ag_2O, MgO and B_2O_3 additions after partial-melting and solidification in high magnetic fields"Adv. Cryogenic Engineering: Proc. ICMC.. 48. 383-390 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu, et al.: "Crystal growth of Bi-2201 phase in high magnetic fields"Physica C. 382. 27-32 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu, et al.: "Microstructure and Critical Current Density of Bi-2223 Superconductor Solidified in High Magnetic Fields"J. Japan Inst. Metals (in Japanese). Vol. 66, No. 4. 254-259 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu, et al.: "Formation and texture of Bi-2223 phase during sintering in high magnetic fields"Physica C. in print.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] X.Y.Lu: "The texture and formation of(Bi,Pb)-2223 phase with Ag_2O, MgO and B_2O_3 additions after partial-meeting and solidification in high magnetic fields"Adv.in Cryogenic Eng.: Proc.ICMC. 48巻. 383-390 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] X.Y.Lu: "Crystal growth of Bi-2201 phase in high magnetic fields"Physica C. 382. 27-32 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 魯小葉: "磁場中凝固したBi-2223超伝導材料の組織とJc特性"日本金属学会誌. 66・4. 254-259 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] X.Y.Lu: "Formation and texture of Bi-2223 phase during sintering in high magnetic fields"Physica C. (発表予定).

    • Related Report
      2002 Annual Research Report
  • [Publications] 魯 小葉: "磁場中凝固したBi-2223超伝導材料の組織とJc特性"日本金属学会誌. (発表予定).

    • Related Report
      2001 Annual Research Report
  • [Publications] X.Y.Lu: "Crystal growth of Bi-2201 phase in high magnetic fields"Physica C. (発表予定).

    • Related Report
      2001 Annual Research Report
  • [Publications] X.Y.Lu: "The texture and formation of (Bi, Pb)-2223 phase with Ag_2O, MgO and B_2O_3 additions after partial-melting and solidification in high magnetic fields"Adv. Cryo. Eng. (Mater.). (発表予定).

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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