Enhanced pinning by second-phase precipitates in Sr rich “Bi2Sr2CaCu2O8” ceramics

✍ Scribed by Peter Majewski; Steffen Elschner; Fritz Aldinger

• Publisher: Elsevier Science
• Year: 1995
• Tongue: English
• Weight: 361 KB
• Volume: 249
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(95)00303-7

✦ Synopsis

From a consideration of the phase equilibrium diagram of the system Bi203-SrO-CaO-CuO, a simple annealing procedure was developed to precipitate Bi2+xSr2_xCuO6+a, Sr14Ct124041_ x and BieSr306 in high-temperature superconducting "Bi2Sr2CaCu208" ceramics. The transformation results in a four-fold increase of the critical current density at 0.5 to 1 T, which is believed to reflect the increased pinning properties of these ceramics by second-phase precipitates.