Oxide-based superconductor, a process for preparing the same and

Details Oxide-based superconductor, a process for preparing the same and Oxide-based superconductor, a process for preparing the same and

1993-09-02

1996-08-13

Bonner, Melissa

Superconductor technology: apparatus, material, process

High temperature , per se

Thallium containing

505783, 505704, 505740, 505733, 505237, 505238, 505492, 505501, 252521, 252518, 428930, 501123, B32B 900, H01B 1200, H01L 3912

Patent

active

055456103

ABSTRACT:
An oxide-based superconductor ccmprising Tl, Pb, Sr, Ca and Cu or Tl, Pb, Ba, Sr, Ca and Cu, prepared by subjecting a low melting point composition comprising the superconductor-constituting elements and a solid composition comprising the superconductor-constituting elements, prepared in advance, to reaction under melting conditions for the low melting point composition, has distinguished current pass characteristics in a high magnetic field due to improvement of electric contact among grains through reduction of non-superconductor phase, increase in crystal grain sizes (reduction of crystal boundaries), orientation of crystal and cleaning of crystal boundaries.

REFERENCES:
patent: 5049541 (1991-09-01), Uzumaki et al.
patent: 5252543 (1993-10-01), Tanaka et al.
Applied Physics Letters, vol. 59, No. 24, 9, Dec. 1991, New York, US-pp. 3186-3188 Tomoichi Kamo, et al "Introduction of pinning centers into TR1-(1223) phase of T1-Sr-Ca-Cu-O systems".
Patent Abstracts of Japan, vol. 014, No. 034 (C-679) 23 Jan. 1990 & JP-A-01 270 561 (Nippon Steel Corp.) 27 Oct. 1989.
Patent Abstracts of Japan, vol. 014, No. 131 (C-0700) 13 Mar. 1990 & JP-A-02 006 330 (Sanyo Electric Co Ltd) 10 Jan. 1990.
Patent Abstracts of Japan, vol. 015, No. 177 (C-0829) 7 May 1991 & JP=A-03 040 954 (Sony Corp) 21 Feb. 1991.

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