TY - JOUR
T1 - Effect of Compaction Pressure on the Jc of Superconductor Bi-2212 in Bulk
AU - Martínez Ramírez, Ismael
AU - Díaz Valdeś, Elvia
AU - Mejía García, Concepción
AU - Santoyo Salazar, Jaime
AU - Conde Gallardo, Agustin
AU - Guillén Cervantes, Ángel
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.
PY - 2023/1
Y1 - 2023/1
N2 - The aim of this work was to study the effect of compaction pressure on the growth of the crystalline structure of the Bi-2212 phase and on the current density of the material. Ceramic samples were prepared by conventional solid-state reaction method, sintered at 840 ∘C after compacting at five different pressures that were 300, 450, 600, 750, and 900 MPa. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), resistivity vs. temperature (ρ vs. T) by the four-point probe method, critical current density vs. magnetic field (Jc vs. H) at 4 K, and by mass density vs. pressure (ρm vs. P). The XRD patterns show the main reflections of the Bi-2212 and Bi-2223 phases for all samples, varying slightly in intensity and with the presence of approximately 95.77% and 4.23% of each phase. The highest critical temperature values, at the beginning of the superconductor transition, Tc,on1, and for R= 0 , Tc,, are noted to be about 111.63 K and 101.20 K, respectively. For the calculations of critical current density, we used the Bean model, obtaining 6.84 x10 7Am- 2 (the highest for 600 MPa) and 9.71 x10 6Am- 2 (the lowest for 300 MPa). The optimal conditions that improve the electrical, physical, and morphological behavior of the Bi-2212 superconducting material occur when the compaction pressure is 600 MPa and the lattice parameter c of the crystal structure is increased.
AB - The aim of this work was to study the effect of compaction pressure on the growth of the crystalline structure of the Bi-2212 phase and on the current density of the material. Ceramic samples were prepared by conventional solid-state reaction method, sintered at 840 ∘C after compacting at five different pressures that were 300, 450, 600, 750, and 900 MPa. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), resistivity vs. temperature (ρ vs. T) by the four-point probe method, critical current density vs. magnetic field (Jc vs. H) at 4 K, and by mass density vs. pressure (ρm vs. P). The XRD patterns show the main reflections of the Bi-2212 and Bi-2223 phases for all samples, varying slightly in intensity and with the presence of approximately 95.77% and 4.23% of each phase. The highest critical temperature values, at the beginning of the superconductor transition, Tc,on1, and for R= 0 , Tc,, are noted to be about 111.63 K and 101.20 K, respectively. For the calculations of critical current density, we used the Bean model, obtaining 6.84 x10 7Am- 2 (the highest for 600 MPa) and 9.71 x10 6Am- 2 (the lowest for 300 MPa). The optimal conditions that improve the electrical, physical, and morphological behavior of the Bi-2212 superconducting material occur when the compaction pressure is 600 MPa and the lattice parameter c of the crystal structure is increased.
KW - Bi-based superconductors
KW - Compaction pressure
KW - Current density
KW - SEM
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=85141560854&partnerID=8YFLogxK
U2 - 10.1007/s10948-022-06424-0
DO - 10.1007/s10948-022-06424-0
M3 - Artículo
AN - SCOPUS:85141560854
SN - 1557-1939
VL - 36
SP - 25
EP - 32
JO - Journal of Superconductivity and Novel Magnetism
JF - Journal of Superconductivity and Novel Magnetism
IS - 1
ER -