Oxide superconductor composition and a process for the production thereof
AssigneeNEC Corporation
InventorsTakashi Manako, Yuichi Shimakawa, Yoshimi Kubo
Life of this patent
Estimating the term…
Abstract
An oxide superconducting material having a composition represented by a formula TlSr.sub.2 (Sr.sub.n-x Y.sub.x)Cu.sub.n+1 O.sub.5+2n wherein n=1 or 2 and 0.1.ltoreq.x.ltoreq.n is provided. This material has a high critical current density Jc even by sintering at a relatively low temperature of 850.degree.-880.degree. C.
Claims18
An oxide superconductor composition consisting essentially of thallium (Tl), strontium (Sr), yttrium (Y) and copper (Cu) in a form of an oxide;
- a ratio of these elements being represented by a formula
- TlSr.sub.2 (Sr.sub.n-x Y.sub.x)Cu.sub.n+1 O.sub.5+2n (I)
- wherein n=1 or 2 and x is in a range of 0.1.ltoreq.x.ltoreq.n.
A process for the production of an oxide superconductor composition consisting essentially of thallium (Tl), strontium (Sr), yttrium (Y) and copper (Cu) in a form of an oxide;
- a ratio of these elements being represented by a formula
- TlSr.sub.2 (Sr.sub.n-x Y.sub.x)Cu.sub.n+1 O.sub.5+2n (I)
- wherein n=1 or 2 and x is in a range of 0.1.ltoreq.x.ltoreq.n:
- in which process, thallium oxide (Tl.sub.2 O.sub.3), strontium oxide (SrO), yttrium oxide (Y.sub.2 O.sub.3) and cupric oxide (CuO) are mixed together in a ratio of giving the above formula, pressed and fired.
Dependencies are inferred from the claim text.