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1. 发明授权

US06894006B1 Method for forming bismuth-based superconducting ceramics 失效
标题翻译：形成铋基超导陶瓷的方法
公开(公告)号：US06894006B1
公开(公告)日：2005-05-17
申请号：US10031525
申请日：2000-07-21
申请人： Victor A. Maroni , Nazarali N. Merchant , Ronald D. Parrella
发明人： Victor A. Maroni , Nazarali N. Merchant , Ronald D. Parrella
IPC分类号： C04B35/45 , C04B35/64 , H01B12/00 , H01L39/24 , C04B101/00
CPC分类号： C04B35/4525 , C04B35/64 , H01L39/248
摘要： A method for reducing the concentration of non-superconducting phases during the heat treatment of Pb doped Ag/Bi-2223 composites having Bi-2223 and Bi-2212 superconducting phases is disclosed. A Pb doped Ag/Bi-2223 composite having Bi-2223 and Bi-2212 superconducting phases is heated in an atmosphere having an oxygen partial pressure not less than about 0.04 atmospheres and the temperature is maintained at the lower of a non-superconducting phase take-off temperature and the Bi-2223 superconducting phase grain growth take-off temperature. The oxygen partial pressure is varied and the temperature is varied between about 815° C. and about 835° C. to produce not less than 80 percent conversion to Pb doped Bi-2223 superconducting phase and not greater than about 20 volume percent non-superconducting phases. The oxygen partial pressure is preferably varied between about 0.04 and about 0.21 atmospheres. A product by the method is disclosed.
摘要翻译：公开了一种在具有Bi-2223和Bi-2212超导相的掺杂Pb的Ag / Bi-2223复合材料的热处理中降低非超导相浓度的方法。具有Bi-2223和Bi-2212超导相的Pb掺杂的Ag / Bi-2223复合物在氧分压不小于约0.04大气压的气氛中加热，并且温度保持在非超导相的较低温度 Bi-2223超导相晶粒生长起飞温度。氧分压变化，温度在约815℃和约835℃之间变化，以产生不少于80％的转化为Pb掺杂的Bi-2223超导相，并且不大于约20体积％的非超导阶段氧分压优选在约0.04和约0.21大气压之间变化。公开了通过该方法的产品。

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