Yttrium-based superconductors with tungsten nano-structures

Patent metadata

Field	Value
Publication number	US-11107967-B2
Application number	US-201816161430-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Oct 16, 2018
Publication date	Aug 31, 2021
Grant date	Aug 31, 2021

Abstract

A superconducting material includes YBa 2 Cu 3 O 7-δ and a nano-structured, preferably nanowires, WO 3 dopant in a range of from 0.01 to 3.0 wt. %, preferably 0.075 to 0.2 wt. %, based on total material weight. Methods of making the superconductor may preferably avoid solvents and pursue solid-state synthesis employing Y, Ba, and/or Cu oxides and/or carbonates.

First claim

The invention claimed is:

1. A superconducting material, comprising:
a YBa 2 Cu 3 O 7-δ matrix phase; and
0.05 to 0.2 wt. %, based on total superconducting material weight, of particles of a dopant, wherein the dopant is a nano-structured WO 3 in the form of WO 3 nanowires and wherein the WO 3 nanowires are disposed within voids between grain boundaries of the YBa 2 Cu 3 O 7-δ matrix phase.

2. The material of claim 1 , wherein the WO 3 dopant is present in the range of from 0.075 to 0.2 wt. %.

3. The material of claim 1 , wherein at least 99% of the dopant have a nano-wire structure.

4. The material of claim 1 , having at least 97% YBa 2 Cu 3 O 7-δ phase with orthorhombic crystal structure and Pmmm symmetry.

5. The material of claim 1 , comprising:
no more than 0.5% of Y 2 BaCuO 5 (Y-211);
no more than 0.5% of YBaCu 2 O 5-δ (Y-112);
no more than 0.5% of YBa 2 Cu 4 Oy (Y-124);
no more than 0.5% of Y 2 Ba 4 Cu 7 O y (Y-247); and
no more than 0.5% of BaCuO 2 ,
based on the total phases concentration.

6. The material of claim 1 , comprising no more than 1% of any further phases of YBCO than Y-123, based on the total phases concentration.

7. The material of claim 1 , having in its matrix a regular form of nanometer scale entities bright in contrast dispersed into grains.

8. The material of claim 1 , having a superconducting transition in a range of from 80 to 100 K.

9. The material of claim 1 , having a critical current density (J cm ) in a range of from 1.0×10 4 to 1.4×10 4 A/cm 2 , in an applied magnetic field of 0 Tesla.

10. The material of claim 1 , having a critical current density (J cm ) in a range of from 600 to 800 A/cm 2 , in an applied magnetic field of 1 Tesla.

11. The material of claim 1 , having a critical current density of at least 4×10 3 to 10 5 A/cm 2 across a temperature range of from 60 to 10 K under a magnetic field in a range of from 0 to 6 Tesla.

12. The material of claim 1 , consisting of the YBa 2 Cu 3 O 7-δ matrix phase and the WO 3 nanowires.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Slimani Yassine
• Almessiere Munirah Abdullah
• Azzouz Faten Ben

Classifications

• H01L39/126 Primary

  Electricity · mapped topic

• H01L39/2419

  Electricity · mapped topic

• H01L39/143

  Electricity · mapped topic

• H10N60/0828

  Introducing flux pinning centres · CPC title

• H10N60/203

  comprising high-Tc ceramic materials · CPC title