再冷压Bi系块材的磁化和磁通钉扎  

MAGNETIZATION AND FLUX PINNING IN THE RE-COLD PRESSED Bi-BASED BULK MATERIALS

作　　者：袁松柳[1] 王玉贵[1] 王顺喜[1] 

机构地区：[1]中国科学院等离子体物理所,合肥230031

出　　处：《低温物理学报》1992年第2期149-154,共6页Low Temperature Physical Letters

摘　　要：实验上研究了再冷压过程对 Bi_(1.80)Pb_(0.34)Sr_(1.86)Ca_2Cu_3O_y 块材的结构、磁滞迥线和临界电流密度等的影响.结果表明,再冷压过程有利于块材样品的致密度提高和沿垂直于加压表面方向的晶粒取向的形成,并引进了不同于常规烧结的 Bi 系块材的磁通钉扎,从而导致这类块材的临界电流密度和磁滞回线的实质性改进.Effect of the re-cold pressing process on structure, magnetization loop and critical current density etc. of Bi1.80 Pb0.34 Sr1.86 Ca2 Cu3 Oy bulk material was experimentally investigated. It is shown that the re-cold pressing process is helpful to increase its volume density and form some orientations of the grains along the direction perpendicular to the pressed surface. On the other hand, flux pinning, which differs from that observed in the conventionally sintered bismuth based bulk sample, is induced into this material by the re-cold pressing process. As a result, these lead to substantively improve on its critical current density and hysteresis loop.

关 键 词：铋系 超导体 磁通钉扎 冷压 磁化 

分 类 号：TM262[一般工业技术—材料科学与工程]