US 12,069,968 B2
Solid state synthetic method for superconductor material
Yassine Slimani, Dammam (SA); Munirah Abdullah Almessiere, Dammam (SA); and Faten Ben Azzouz, Dammam (SA)
Assigned to Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed by Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed on Aug. 3, 2023, as Appl. No. 18/364,497.
Application 17/320,660 is a division of application No. 16/161,430, filed on Oct. 16, 2018, granted, now 11,107,967, issued on Aug. 31, 2021.
Application 18/364,497 is a continuation of application No. 17/320,660, filed on May 14, 2021, granted, now 11,770,983.
Prior Publication US 2024/0099162 A1, Mar. 21, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H10N 60/85 (2023.01); H10N 60/01 (2023.01); H10N 60/20 (2023.01)
CPC H10N 60/857 (2023.02) [H10N 60/0268 (2023.02); H10N 60/203 (2023.02)] 20 Claims
OG exemplary drawing
 
1. A solid state synthetic method for making a superconducting material, comprising:
heating an oxidized form of yttrium, an oxidized form of barium, and an oxidized form of copper in molar ratios of 1 (Y):1.9 to 2.1 (Ba):2.9 to 3.1 (Cu) in a range of from 850 to 1050° C. for a time in a range of from 8 to 16 hours, to obtain a Y-123, the oxidized forms of yttrium, barium, and copper being free of chelating ligands;
grinding a mixture comprising the Y-123 and 0.01 to 3.0 wt. %, relative to total mass of the mixture, of nano-structured WO3 to form a superconductor precursor;
pressing the superconductor precursor at a pressure in a range of from 500 to 1000 MPa into a precursor;
sintering the pre-sintered precursor at a temperature in a range of from 900 to 1000° C. for a period in a range of from 4 to 12 hours, to obtain a sintered product, wherein the heating, grinding, pressing and sintering are carried out in the absence of a solvent; and
cooling the sintered product at a rate in a range of from 1 to 10° C./minute to obtain the superconducting material;
wherein the superconducting material, comprises:
a YBa2Cu3O7-δ matrix phase; and
0.05 to 0.2 wt. %, based on total superconductor weight, of particles of a dopant,
wherein the dopant is the nano-structured WO3 in the form of WO3 nanowires and
wherein the WO3 nanowires are disposed within voids between grain boundaries of the YBa2Cu3O7-δ matrix phase.