The Influence of Postannealing on Structural and Superconducting Properties of Bi-2212 Ceramics

Abstract

The effect of postannealing on the structural and superconducting properties of

Physical, electrical and magnetic properties of Cr doped Bi2Sr2Ca1Cu2−xCrxOy (Bi-2212) superconductors prepared by laser floating zone technique

“…However, the presence of intergrain weak links and the weak flux pinning capability in bulk materials are still drawbacks for reaching high critical current density (J c ) values in these materials [1,2]. As it is well known, the enhancement of J c is one of the most important issues for their practical applications [3][4][5][6][7][8]. As a consequence, many attempts have been performed to increase their current carrying capability.…”

Effect of Yb substitution in Bi-2212 ceramics prepared by laser floating zone technique

“…Solid-state reaction method is one of the simplest and most harmless methods for preparing of ceramic superconductors involving mixing, calcination and sintering. Also, many works show that high J c values can be easily obtained by optimal adjustments in parameters such as annealing time, post annealing temperature and pelletization pressure [1][2][3][4].…”

Modification of physical and structural properties of Bi1.8Pb0.4Sr2Ca2.2Cu3Oy ceramics induced by annealing

“…Other possibility to produce these pinning centers is based on the self-production of isolating phases with the adequate size to act as pinning centers. It has been demonstrated that it is possible to produce this effect on Bi-2212 phase using the phase diagram equilibrium [13,28]. In the case of Bi-2223 superconductor, it is well known that this phase is stable in a range of compositions [29] and temperatures [30] and it can be seen as a good candidate to perform its controlled decomposition to produce pinning centers.…”