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Title:
PRODUCTION OF OXIDE SUPERCONDUCTOR
Document Type and Number:
Japanese Patent JPH01246131
Kind Code:
A
Abstract:

PURPOSE: To obtain the product of high purity and high critical current density with by-products reduced by using BaCuO2 powder, Ca2CuO3 powder and a Tl compound as starting substances in the production of a Tl-Ba-Ca-Cu-O superconductor.

CONSTITUTION: A powder of BaCuO2 and another powder of Ca2CuO3 are mixed, calcined and crushed, then the mixture is combined with a Tl compound (such as Tl2O3), or BaCuO2 powder and Ca2CuO3 powder are mixed, the resultant mixture is mixed with a Tl compound, and the mixture is calcined to an oxide superconductor of the Tl-Ba-Ca-Cu-O system. The proportions of individual components are adjusted so that an oxide superconductor of the composition represented by a general formula TlaBabCacCumOn (1≤a, b, c, m≤3, 4≤n≤15) is obtained. The superconductor is suitably used in the magnetic levitation propulsion system for trains.


Inventors:
Uchikawa, Hiroshi
Ito, Takao
Sakata, Hiroyuki
Application Number:
JP1988000071795
Publication Date:
October 02, 1989
Filing Date:
March 28, 1988
Export Citation:
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Assignee:
ONODA CEMENT CO LTD
International Classes:
H01L39/24; C01G1/00; C01G3/00; C04B35/00; C04B35/45; H01B12/00; H01B13/00; (IPC1-7): C01G3/00; C04B35/00; H01B12/00; H01B13/00; H01L39/24