The effect of different dwell times at a constant pelletization pressure of 6 GPa on superconducting properties of Bi1.8Sr2Ca1.1Cu2.1Oy ceramics
Küçük Resim Yok
Tarih
2016
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SPRINGER
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the physical and magnetic properties of Bi1.8Sr2Ca1.1Cu2.1Oy superconductors kept in different dwell times (1, 6, and 12 h) at a constant pelletization pressure of 6 GPa in the pressing step as prepared by standard solid-state reaction method are reported. The X-ray diffraction data shows that all samples have a tetragonal crystal structure with predominant Bi-2212. SEM micrographs for all samples predominately show plate-like grain structure, indicating the presence of Bi-2212 phase. Both T-c (onset) and T-c (offset) significantly increase with increasing dwell time. M-H measurements were performed at T = 10 and 25 K, respectively. In addition, J(c) values of the samples were calculated from their magnetic hysteresis loops using the Bean's model. It has been found that J(c) in the samples including long dwell times under the pelletization pressure of 6 GPa improves.
Açıklama
Anahtar Kelimeler
Kaynak
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
27
Sayı
8
