High temperature superconducting materials

Patent metadata

Field	Value
Publication number	US-12022748-B2
Application number	US-202318162817-A
Country	US
Kind code	B2
Filing date	Feb 1, 2023
Priority date	Feb 14, 2017
Publication date	Jun 25, 2024
Grant date	Jun 25, 2024

Abstract

A superconducting composition of matter including overlapping first and second regions. The regions comprise unit cells of a solid, the first region comprises an electrical insulator or semiconductor, and the second region comprises a metallic electrical conductor. The second region extends through the solid and a subset of said second region comprise surface metal unit cells that are adjacent to at least one unit cell from the first region. The ratio of the number of said surface metal unit cells to the total number of unit cells in the second region being at least 20 percent.

First claim

What is claimed is:

1. A cuprate superconductor, comprising:
a wire comprising:
grain boundaries;
an aperiodic lattice of CuO 2 planes; and
first atoms occupying sites between said CuO 2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;

wherein:
the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
the concentration of said third atoms is greater than 5% of the concentration of said first atoms.

2. The cuprate superconductor of claim 1 , wherein the wire is configured to utilize an S-wave property of the cuprate superconductor.

3. The cuprate superconductor of claim 1 , characterized as an S-wave superconductor.

4. The cuprate superconductor of claim 1 , wherein the doping has increased the superconducting transition temperature relative to the undoped D-wave superconducting temperature.

5. An electrical machine or power transmission device comprising the cuprate superconductor of claim 1 , wherein:
the electrical machine generates a magnetic flux in response to a current density flowing in the wire, and
the electrical machine or the power transmission device is configured to utilize an S-wave property of the cuprate superconductor.

6. A machine comprising the cuprate superconductor of claim 4 .

7. The cuprate superconductor of claim 1 , wherein the first atoms have oxidation state plus three, the second atoms have oxidation state plus two, and the third atoms have oxidation state plus four.

8. The cuprate superconductor of claim 7 , wherein the first atoms comprise Yttrium or Lanthanum and the second atoms comprise Magnesium, Calcium, Strontium, Barium, Zinc, Cadmium, Copper, Nickel, or Cobalt, and wherein the third atoms comprise Titanium, Zirconium, Hafnium, Cerium, Carbon, Silicon, Germanium, Tin, or Lead.

9. The cuprate superconductor of claim 1 , wherein the third atoms comprise Cerium.

10. The cuprate superconductor of claim 1 , wherein the first atoms have oxidation state plus two, the second atoms have oxidation state plus one, the third atoms have oxidation state plus three.

11. The cuprate superconductor of claim 10 , wherein the first atoms comprise Magnesium, Calcium, Strontium, Barium, Zinc, Cadmium, Copper, Nickel, or Cobalt.

12. The cuprate superconductor of claim 1 , wherein the first atoms comprise Oxygen and the third atoms comprise Fluorine.

13. A method of making a cuprate superconductor, comprising:
fabricating a wire comprising:
grain boundaries;
an aperiodic lattice of CuO 2 planes; and
first atoms occupying sites between said CuO 2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;

wherein:
the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
the concentration of said third atoms is greater than 5% of the concentration of said first atoms; and

measuring an S-wave property of the cuprate superconductor.

14. The method of claim 13 , wherein:
the first atoms comprise Yttrium or Lanthanum and the second atoms comprise Magnesium, Calcium, Strontium, Barium, Zinc, Cadmium, Copper, Nickel, or Cobalt, and wherein the third atoms comprise Titanium, Zirconium, Hafnium, Cerium, Carbon, Silicon, Germanium, Tin, or Lead.

15. The method of claim 13 , wherein the third atoms comprise Cerium.

16. The method of claim 13 , wherein:
the first atoms have oxidation state plus two, the second atoms have oxidation state plus one, the third atoms have oxidation state plus three, or
the first atoms have oxidation state plus three, the second atoms have oxidation state plus two, and the third atoms have oxidation state plus four.

17. The method of claim 13 , further comprising:
fabricating an electrical machine or power transmission device comprising the cuprate superconductor of claim 13 , wherein:
the electrical machine generates a magnetic flux in response to a current density flowing in the wire, and
the electrical machine or the power transmission device is configured to utilize an S-wave property of the cuprate superconductor.

18. The method of claim 17 , wherein the doping has increased the superconducting transition temperature relative to the undoped D-wave superconducting temperature.

19. A method of using a cuprate superconductor, comprising:
obtaining a wire comprising:
grain boundaries;
an aperiodic lattice of CuO 2 planes; and
first atoms occupying sites between said CuO 2 planes, dopant atoms comprising second atoms and third atoms occupying first atom sites, where the second atoms are p-type dopants relative to the first atoms, and the third atoms are n-type dopants relative to the first atoms;

wherein:
the total concentration of said dopant atoms is greater than 20% of the concentration of said first atoms,
the concentration of said second atoms is greater than 5% of the concentration of said first atoms, and
the concentration of said third atoms is greater than 5% of the concentration of said first atoms; and

using an S-wave property of the cuprate superconductor.

20. The method of claim 19 , wherein using the S-wave property comprises using a stability against the grain boundaries.

Assignees

• California Inst Of Techn

Inventors

• Tahir-Kheli Jamil

Classifications

• H10N60/0296

  Processes for depositing or forming copper oxide superconductor layers · CPC title

• C04B2235/3289

  Noble metal oxides · CPC title

• C04B2235/3244

  Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof · CPC title

• C04B35/4504

  containing rare earth oxides · CPC title

• C04B2235/3215

  Barium oxides or oxide-forming salts thereof · CPC title