High Temperature Superconductors
OwnerRefael Gatt, Gili Yaniv +1inventors
InventorsRefael Gatt, Gili Yaniv, Peter Rusian
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Abstract
This disclosure relates to compounds of formula (I): LnDm(BxB′1-x)r(ZtZ′1-t)qMpAyA′s (I), in which n, m, x, r, t, q, p, y, s, L, D, B, B′, Z, Z′, M, A, and A′ are defined in the specification. These compounds can exhibit superconductivity at a high temperature. This disclosure also features a fault current limiter device, including an electrically conducting element including a superconducting material having a superconducting state below a critical current and a normal conductive state above the critical current.
Claims32
A compound of formula (I):
- wherein
- n is a number from 0 to 3;
- m is a number from 0 to 6;
- x is a number from 0.1 to 1;
- r is a number from 1 to 8;
- t is a number from 0 to 1;
- q is a number from 0 to 6;
- p is a number from to 7;
- s is a number from 0 to 20;
- y is a number from 0 to 20;
- L comprises at least one metal ion selected from the group consisting of transition metal ions and post-transition metal ions;
- D comprises at least one element selected from the group consisting of the elements in Groups IIIA and IVA in Periodic Table;
- B comprises at least one first alkali metal ion;
- B′ comprises at least one first ion selected from the group consisting of alkaline earth metal ions and rare earth metal ions;
- Z comprises at least one second alkali metal ion;
- Z′ comprises at least one second ion selected from the group consisting of alkaline earth metal ions and rare earth metal ions;
- M comprises at least one transition metal ion;
- A comprises at least one chalcogen anion;
- and
- A′ comprises at least one halogen anion;
- wherein the compound is a crystalline compound.
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A compound, wherein the compound is a crystalline metal oxide comprising at least one transition metal ion, at least one alkaline earth metal ion or at least one rare earth metal ion, and at least one chalcogen anion, in which from 10% to 100% of the at least one alkaline earth metal ion or at least one rare earth metal ion is replaced by an alkali metal ion and from 10% to 100% of the at least one chalcogen anion is replaced by a halogen anion.
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A method, comprising:
- mixing at least one metal oxide with at least first and second salts, wherein the at least one metal oxide comprises at least one transition or post-transition metal cation, the first salt is an alkali metal halogen salt containing an alkali metal cation and a halogen anion to form a mixture, the second salt comprises an alkaline earth or rare earth metal cation, and the atomic ratio between the alkali metal cation and the alkaline earth or rare earth n metal cation is at least 1:1;
- and
- sintering the mixture at an elevated temperature to form a crystalline compound containing the alkali metal cation and the halogen anion.
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Dependencies are inferred from the claim text.