Large shaped parts of melt cast BSCCO for applications in electrical engineering
Large shaped parts of melt cast BSCCO for applications in electrical engineering
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用于电气工程应用的熔铸 BSCCO 大型零件
DOI：
10.1109/77.233913
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发表时间：
1993
影响因子：
1.8
通讯作者：
E. Preisler
中科院分区：
文献类型：
--
作者：
J. Bock;H. Bestgen;S. Elschner;E. Preisler
描述了一种为铋锶钙铜氧（BSCCO）量身定制的熔铸工艺（MCP），尤其适用于2212相。据报道，熔铸工艺易于获得各种不同的形状和尺寸。通过混入硫酸锶，熔铸工艺（MCP）所获得材料的性能得到了显著提高。已获得优于钇钡铜氧（YBCO）或铋锶钙铜氧（BSCCO）烧结陶瓷的临界电流密度（J/sub c/）值：在无外加磁场的情况下，达到了55000安/平方厘米（4K）和2200安/平方厘米（77K）的临界电流密度值；大块部件在自身磁场下展现出超过2000安（77K）的性能。熔铸工艺（MCP）的特性允许集成贵金属电流触点，即使在高电流下，其总电阻也≤1微欧（77K）。对原型（用于电流引线的棒材和管材，用于感应式限流器的空心圆柱体）的初步测试显示出了有前景的结果。
A melt casting process (MCP) that is tailor made for BSCCO, especially for the 2212 phase, is described. It is reported that melt casting offers an easy access to a variety of different shapes and sizes. The properties of the material obtained by MCP have been significantly improved by admixing strontium sulphate. J/sub c/ values superior to those of sintered ceramics of YBCO or BSCCO have been obtained: J/sub c/ values at 55000 A/cm/sup 2/ (4 K) and 2200 A/cm/sup 2/ (77 K) were achieved without external fields; large bulk parts exhibited more than 2000 A (77 K) in their self-field. The peculiarities of MCP allow the integration of noble metal current contacts which exhibit total resistances <or=1 mu Omega (77 K), even under high currents. First tests of prototypes (rods and tubes for current leads, hollow cylinders for inductive current limiters) show promising results.<<ETX>>