首页> 外国专利> A PROCESS FOR THE PREPARATION OF HIGH TEMPERATURE SUPERCONDUCTING BULK CURRENT LEADS WITH IMPROVED PROPERTIES AND SUPERCONDUCTING BULK CURRENT LEADS MADE THEREBY

A PROCESS FOR THE PREPARATION OF HIGH TEMPERATURE SUPERCONDUCTING BULK CURRENT LEADS WITH IMPROVED PROPERTIES AND SUPERCONDUCTING BULK CURRENT LEADS MADE THEREBY

机译:制备性能提高的高温超导块状电流铅并由此制备的超导块状电流铅的方法

摘要

The present invention provides a process for the preparation of high temperature superconducting (HTS) bulk current leads capable of supplying a continuous current of more than 200A at 77K, at least for 2 to 4 hours without any substantial heat load to cryogen free cryocooler and other superconducting magnet systems. The superconducting bulk current leads with improved properties are prepared from an improved high temperature superconducting (HTS) bismuth based cuperate [(Bi, Pb)2 Sr2Ca2Cu3O10+x ] material in tube and rod shape with both end metallic contacts. To produce such a lead, the process included modification of the superconducting material with homogeneous silver addition, a step of initial sintering in a large size tube followed by crushing into powder, a step of shaping the said initially sintered tube powder into tubes and rods of different size, a step of formation of metallic contacts by a perforated silver foil sandwiched between two metal spray deposited silver at both end parts of the said tubes and rods followed by a final step of co-sintering. In the current leads obtained according to these aspects, it is possible to stably carry current more than 200A required for energizing superconducting magnet systems.
机译:本发明提供了一种制备高温超导(HTS)大电流引线的方法,该引线能够在77K下至少持续2-4小时提供大于200A的连续电流,而对无制冷剂的低温冷却器和其他冷却器没有任何实质的热负荷。超导磁体系统。具有改进性能的超导大电流引线由具有两端金属触点的管状和棒形的改进的高温超导(HTS)铋基铜酸盐[(Bi,Pb)2 Sr2Ca2Cu3O10 + x]材料制成。为了生产这样的铅,该方法包括用均匀的银添加对超导材料进行改性,在大尺寸管中进行初始烧结,然后粉碎成粉末的步骤,将所述初始烧结后的管粉末成形为管和棒的步骤。在不同尺寸的情况下,通过在所述管和棒的两个端部处夹在两种金属喷涂沉积的银之间的多孔银箔形成金属接触的步骤,然后是最后的共烧结步骤。在根据这些方面获得的电流引线中,可以稳定地承载大于为超导磁体系统通电所需的200A以上的电流。

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