Method of manufacturing oxide superconducting wire

Details Method of manufacturing oxide superconducting wire Method of manufacturing oxide superconducting wire

H - Electricity

01

B

26/112.1

H01B 12/00 (2006.01) H01B 13/00 (2006.01) H01L 39/24 (2006.01)

Patent

CA 2033266

An oxide superconducting wire is obtained by performing plastic working and heat treatment of a metal pipe which is filled up with raw material powder of an oxide superconductor. In the plastic working step, the metal pipe is subjected to flat working so that the raw material powder flows in the longitudinal direction as well as the cross direction in the metal pipe. In this case, a draft of at least 80 % and not more than 98 % is selected in the flat working step, to further promote the cross-directional flow of the raw material powder, thereby further improving density of the raw material powder. Thus, the as-formed oxide superconducting wire exhibits higher critical current density.

Fil d'oxyde supraconducteur obtenu par déformation plastique et traitement thermique d'un tuyau métallique rempli de poudre de matière première d'un oxyde supraconducteur. Lors de l'étape de déformation plastique, le tuyau métallique subit un laminage à plat pour que la poudre de matière première s'écoule dans le sens longitudinal comme dans le sens transversal du tuyau métallique. Dans ce cas, un étirage d'au moins 80 % et d'au plus 98 % est choisi pour l'étape de laminage à plat, pour favoriser davantage l'écoulement transversal de la poudre de matière première, ce qui augmente encore plus la densité de la poudre de matière première. Le fil d'oxyde supraconducteur ainsi formé présente une densité de courant critique plus élevée.

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