Effect of Secondary Annealing Process on Critical Current Density in Highly Textured Bi-2212 Superconducting System

Aksan, M. A. ; Madre, M. A. (Universidad de Zaragoza) ; Rasekh, S. ; Constantinescu, G. ; Torres, M. A. (Universidad de Zaragoza) ; Diez, J. C. (Universidad de Zaragoza) ; Sotelo, A. (Universidad de Zaragoza) ; Yakinci, M. E.

Resumen: Bi-2212 samples prepared by a solid-state reaction technique have been grown from the melt using the laser floating zone method. After annealing the as-grown bars, the samples showed a good grain alignment and a high transport critical current density. Secondary annealing processes were performed on the annealed samples with the aim of producing Bi-2212 phase controlled decomposition. Hence, the Bi-2201 phase and the secondary phases, which act as effective pinning centers, were obtained with the secondary annealing process. After these thermal treatments, the transport critical current densities of samples significantly increased, when compared to the annealed ones. The maximum critical current density was achieved when the samples were subjected to secondary annealing at 680°C for 168 h with an improvement of ~80%, compared to the annealed ones. Moreover, it was found that magnetization of the secondarily annealed samples was also increased. The magnetic critical current densities in these secondary annealed samples were about 3 times higher than the values obtained for the annealed ones. These results clearly indicate that the secondary annealing processes lead to the formation of effective pinning centers in the bulk material.

Idioma: Inglés

DOI: 10.1007/s11837-015-1509-2

Año: 2015

Publicado en: JOM 67, 9 (2015), 2079-2086
ISSN: 1047-4838

Factor impacto JCR: 1.798 (2015)

Categ. JCR: METALLURGY & METALLURGICAL ENGINEERING rank: 13 / 73 = 0.178 (2015) - Q1 - T1
Categ. JCR: MINING & MINERAL PROCESSING rank: 5 / 21 = 0.238 (2015) - Q1 - T1
Categ. JCR: MINERALOGY rank: 11 / 29 = 0.379 (2015) - Q2 - T2
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 116 / 270 = 0.43 (2015) - Q2 - T2

Factor impacto SCIMAGO: 0.963 - Materials Science (miscellaneous) (Q1) - Engineering (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/T12
Financiación: info:eu-repo/grantAgreement/ES/DGA/T87
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2013-46505-C3-1-R

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Expresión Gráfica en Ing. (Dpto. Ingeniería Diseño Fabri.)
Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)