Superconductors
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United States of America Patent
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-
Jun 8, 1993
Grant Date -
N/A
app pub date -
Apr 16, 1991
filing date -
Apr 19, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Superconducting materials of the (T1,In)-Sr-Ca-Cu-O system-type are modified to raise their critical tempertures by substituting an element M for part of the Tl/In and optionally substituting Y or a rare earth element for some of the Ca. M is a transition metal with valency electrons in d orbitals in its normal state and having accessible tri-and/or tetra-valent states, that is V, Ti, Cr, Zr, Nb, Hf or Ta (which are preferred) Mn, Fe, Co, Ni, Mo, Rh, W, Os, Ir, Re or Ru.
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