Thallium group superconducting wire
AssigneesHitachi, Ltd., International Superconductivity Technology Center
InventorsToshihide Nabatame, Junichi Kawashima, Izumi Hirabayashi, Yuh Shiobara, Shoji Tanaka
Life of this patent
Estimating the term…
Abstract
In order to provide a crystal oriented high quality thallium group superconducting wire having a high critical current density, thallium group superconducting film is formed on oxide single crystal fiber having plane facets and polygonal cross section in the thallium group superconducting wire, wherein c-axis of the thallium group superconducting film is oriented perpendicularly, and a- and b-axis are oriented in parallel to the longitudinal direction of the above fiber, respectively, and resulting to obtain a high quality thallium group superconducting wire with Jc of 10.sup.5 A/cm.sup.2 or more at 77K.
Claims20
A thallium group superconducting wire comprising thallium group superconducting film formed on oxide single crystal fiber having facets and polygonal cross section, a conducting film on the thallium group superconducting film, and an insulating film on the conducting film, the thallium group superconducting film being made up of T1-(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y<1, or (T1/Pb)--(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y.ltoreq.1, said thallium group superconducting wire having an insulated coated structure which is sufficient to allow electric current to escape when the superconducting film is quenched.
A thallium group superconducting wire comprising oxide single crystal fiber, thallium group superconducting film, conducting film, and insulating film structured in the above order when viewed from center of the wire, the thallium group superconducting film made up of T1--(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y<1, or (T1/Pb)--(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y.ltoreq.1, said thallium group superconducting wire having an insulated coated structure which is sufficient to allow electric current to escape when the superconducting film is quenched.
A thallium group superconducting wire comprising a plurality of oxide single crystal fibers, thallium group superconducting film on each of the plurality of oxide single crystal fibers, the plurality of oxide single crystal fibers having the thallium group superconducting film on each of the fibers constituting a bundle, a conducting film on the bundle, and an insulating film on the conducting film, the thallium group superconducting film being made up of T1--(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y<1, or (T1/Pb)--(Ba.sub.1-y /Sr.sub.y)--Ca--Cu--O, where O<y.ltoreq.1, the thallium group superconducting wire having an insulated coated structure which is sufficient to allow electric current to escape when the superconducting film is quenched.
Dependencies are inferred from the claim text.