• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1996 Fiscal Year Final Research Report Summary

Preparation of Hg based superconducting wire by solution spinning method.

Research Project

Project/Area Number 07650816
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionNagoya Institute of Technology

Principal Investigator

GOTO Tomoko  Nagoya Institute of technology, Engineering, Associated Professor, 工学部, 助教授 (00024323)

Project Period (FY) 1995 – 1996
KeywordsHg1223 superconductor / filamentary / solution spinning / precursor filament / F-doping / critical current density / liquidus texture
Research Abstract

We have studied the preparation of Hg based superconducting wire by solution spinning method.
Long precursor filaments were prepared by dry spinning through a homogeneous aqueous solution mixed acetates of Ba, Sr, Ca and Cu, ammonium perrhenate, poly (vinyl alcohol) and organic acids. The as-drawn filament with a diameter of 250 mum was pyrolyzed to remove volatile components and then calcined. The filaments reacted in an evacuated fused quartz with a pellet of Hg_1 (Ba, Sr) _2Ca_1Cu_2Re_<0.1>O_x or Hg_1 (Ba, Sr) _2Ca_2Cu_3Re_<0.2>O_x. A single phase of filamentary Hg1212 (1) or Hg1223 (2) superconductor is prepared with Re addition by controlling the heating condition. The T_c of the (1) and (2) filaments is 93 K and 127 K and J_c at 77K and 0 T is 2300A/cm^2 and 1000A/cm^2, respectively.
A superconducting F-doped Hg_xBa_2Cu_3Re_<0.2>O_y filament was examined to enhance the J_c by using a pellet containing BaF_2. The J_c of the specimens was enhanced by post-annealing up to 350゚C in O_2 flow. The influence of fluorine on the transport J_c of the F-doped Hg1223 filament at 77K was examined in magnetic fields of up to 10 T.F-doping resulted in a formation of dense liquidus texture and marked improvement in the field dependence of J_c for the filament. A J_c of more than 10^2A/cm^2 was maintained at 77 K in a field of 10 T.By controlling the heating condition and addition of a trace HgCl_2, a maximum J_c value of 10^4A/cm^2 at 77 K and 0 T was measured.

  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] T.Goto: "Partial Melting of F-doped Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y filament" proceeding of M2HTSC-V. (to be published).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Effect of F-doping in solution-spun Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y filament" Advan. in Superconductivity XIV. (in press).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto, K.Watanabe and S.Awaji,: "Field dependence of J_c for F-doped Hg1223 filament" Jpn. J. Appl. Phys.35. L1404-L1406 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Superconducting properties of Hg (Ba, Sr)_2CaCu_2ReO_x filament produced by solution spinning" Czechoslovak J. Phys.46 Suppl. S3. 1455-1456 (1996)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Fabrication of superconducting Hg-1212 filament by the solution spinning method" Physica C. 247. 133-136 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Fabrication of superconducting Hg-1223 filament by solution spinning method" JpnJ. Appl. Phys.34. L555-557 (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Studies of High Temperature Superconductor Vol.24/25 ″Hg based superconducting filament″" Nova Science Publishers, Inc. (to be published),

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Goto: "Partial Melting of F-doped Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y filament" to be published in the proceeding of M2HTSC-V.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Effect of F-doping in solution-spun Hg_xBa_2Ca_2Cu_3Re_<0.2>O_y filament" Advan.in Superconductivity XIV.

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto, K.Watanabeand S.Awaji: "Field dependence of J_c for F-doped Hg1223 filament" Jpn.J.Appl.Phys. 35. L1404-L1406 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Fabrication of Hg_1Ba_2Ca_2Cu_3Re_<0.1>O_x filament by solution spinning method" Advan.in Superconductivity. VIII. 899-902 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Superconducting properties of Hg (Ba, Sr) _2CaCu_2ReO_x filament produced by solution spinning" Czechoslovak J.phys.46 Suppl.S3. 1455-1456 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Fabrication of superconducting Hg-1212 filament by the solution spinning method" Physica C. 247. 133-136 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Fabrication of superconducting Hg-1223 filament by solution spinning method" Jpn.J.Appl.Phys. 34. L555-557 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Goto: "Hg based superconducting filament" Studies of High Temperature Superconductor Vol.24/25 Nova Science Publishers, Inc.(to be published).

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1999-03-09  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi