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US 11,770,983 B2Granted
Method for making Y123 superconducting material
AssigneeImam Abdulrahman Bin Faisal University
InventorsYassine Slimani, Munirah Abdullah Almessiere, Faten Ben Azzouz
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Abstract
A superconducting material includes YBa2Cu3O7-δ and a nano-structured, preferably nanowires, WO3 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.
Claims20
A method of synthesizing 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;
- 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 pre-sintered 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;
- 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.
10 more elements
A method of synthesizing 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;
- 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 pre-sintered 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;
- 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 WO3 nanowires are present in the superconducting material in a range of from 0.075 to 0.2 wt. % based on total superconductor weight.
6 more elements
Dependencies are inferred from the claim text.