Method of maufacturing superconductor of ceramics superconductiv

Details Method of maufacturing superconductor of ceramics superconductiv Method of maufacturing superconductor of ceramics superconductiv

1993-10-21

1995-04-25

Kunemund, Robert

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

With melting

117 41, 117 42, 117 49, 305729, C30B 1302

Patent

active

054098920

ABSTRACT:
A method of manufacturing a superconductor by applying a floating zone method to a raw material sintered ingot. This method is adapted to obtain an elongated superconductor which can provide high critical current density. A floating zone is moved along the raw material sintered ingot with such speed difference that the speed in its forward end portion is higher than that in its rear end portion, thereby to obtain a superconductor having a smaller diameter. In order to attain a higher crystal orientation property, it is preferable to select the product of the diameter (D mm) of a superconductor provided with a crystal orientation property, which is produced after passage of the floating zone, and the speed (V mm/h) for moving the floating zone in a range of 0.5.ltoreq.DV.ltoreq.20 and to select pressure P of an atmosphere encircling the floating zone in a range of 0<P.ltoreq.3 [kgf/cm.sup.2 ] as well as to pass the floating zone along the raw material sintered ingot at least twice.

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