Method of preparing oxide high-temperature

Details Method of preparing oxide high-temperature Method of preparing oxide high-temperature

1991-09-10

1995-01-03

Wyszomierski, George

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Process of making wire, tape, cable, coil, or fiber

505500, 148 96, 29599, H01L 3924

Patent

active

053786840

ABSTRACT:
In order to prevent expansion of a metal sheath which is heat treated in order to form an oxide high-temperature superconductor therein, the heat treatment temperature is held at a certain level in an intermediate stage of temperature rising in a step of heat treating the metal sheath after filling raw material for an oxide high-temperature superconductor into the metal sheath. After the heat treatment temperature is thus held at the certain level, the metal sheath is again heated to a target temperature. Preferably, the heat treatment temperature is held at a level which is selected in a range of at least 500.degree. C. and not more than 750.degree. C.

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Hikata, T. et al.: "Ag-sheathed Bi-Pb-Sr-Ca-Cu-O superconducting wires with high critical current density," Japanese Journal of Applied Physics Letters vol. 28, No. 1, Jan. 1989, Kokyo, JP, pp. 82-84.
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