US 11,858,853 B2
Method for making a superconducting YBCO wire or tape
Yassine Slimani, Dammam (SA)
Assigned to Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed by Imam Abdulrahman Bin Faisal University, Dammam (SA)
Filed on Aug. 2, 2023, as Appl. No. 18/363,817.
Application 18/363,817 is a continuation of application No. 18/115,112, filed on Feb. 28, 2023, granted, now 11,767,267.
Application 18/115,112 is a continuation of application No. 17/352,995, filed on Jun. 21, 2021, granted, now 11,613,501, issued on Mar. 28, 2023.
Application 17/352,995 is a continuation of application No. 16/139,755, filed on Sep. 24, 2018, granted, now 11,130,712, issued on Sep. 28, 2021.
Prior Publication US 2023/0373865 A1, Nov. 23, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C04B 35/45 (2006.01); C04B 35/626 (2006.01); C30B 29/22 (2006.01); H10N 60/85 (2023.01)
CPC C04B 35/4504 (2013.01) [C04B 35/6262 (2013.01); C04B 35/62615 (2013.01); C30B 29/225 (2013.01); H10N 60/857 (2023.02)] 10 Claims
OG exemplary drawing
 
1. A method for making a superconducting wire or tape based on a YBCO superconductor matrix, comprising:
mixing powders of yttrium (III) oxide, barium carbonate, and copper(II) oxide then pelletizing to form a pelletized mixture;
calcining the pelletized mixture at a first temperature in the range 850-900° C. for to form a first calcined mixture;
grinding the first calcined mixture to form a first intermediate calcined mixture, then
calcining the first intermediate calcined mixture at a temperature in the range 850-900° C. to form a second calcined mixture, wherein the second calcined mixture is free from carbonate;
ball milling the second calcined mixture at a ball to powder ratio of 5:2 to produce a ball milled sample;
sintering the ball milled sample at a second temperature in the range 900-1000° C. to form a polycrystalline Y3Ba5Cu8Oy material; and
forming the superconductor wire or tape from the polycrystalline Y3Ba5Cu8Oy material;
wherein the polycrystalline Y3Ba5Cu8Oy material is in the form of elongated crystals having an average length of 2 to 10 μm and an average width of 1 to 2 μm, and are embedded with spherical nanoparticles of yttrium deficient Y3Ba5Cu8Oy having an average diameter of 5 to 20 nm, wherein the spherical nanoparticles are in the form of flower-like agglomerates having an average particle size of 30 to 60 nm.