公开(公告)号：US06613270B1

公开(公告)日：2003-09-02

申请号：US09583304

申请日：2000-05-30

申请人： Qi Li ,  Gilbert N. Riley, Jr. ,  Lawrence J. Masur ,  Eric R. Podtburg ,  Ronald D. Parella ,  Martin W. Rupich ,  Donald R. Parker ,  William L. Carter ,  William J. Rosati ,  Mark D. Teplitsky

发明人： Qi Li ,  Gilbert N. Riley, Jr. ,  Lawrence J. Masur ,  Eric R. Podtburg ,  Ronald D. Parella ,  Martin W. Rupich ,  Donald R. Parker ,  William L. Carter ,  William J. Rosati ,  Mark D. Teplitsky

IPC分类号： H01L3900

CPC分类号： H01L39/248 ,  Y10T29/49014

摘要： A novel process of the production and processing of high quality, high Tc BSCCO or (Bi,Pb)SCCO superconductors starts with fabrication of a forming a bundle including a plurality of billets, each billet containing at least one filament comprising a dominant amount of an tetragonal BSCCO phase with selected intermediate phases, and substantially surrounded by a constraining metal. The bundle is thermomechanically consolidated to form a multifilamentary precursor article by applying pressure and heat to the bundle under conditions cooperatively selected to cause interdiffusion of said constraining metal at the interfaces between said metal and said filaments and substantially complete elimination of voids in said bundle, and the consolidation step is completed before any high strain longitudinal deformation is performed on the bundle. The precursor article is then heated at a second selected processing temperature in an inert atmosphere with a second selected oxygen partial pressure for a second selected time period, the second processing temperature, the second time period and the second oxygen partial pressure being cooperatively selected to form a dominant amount of an orthorhombic BSCCO phase in the reacted mixture. It may then be deformed to form an elongated precursor article of a desired texture; and thereafter heated at a third selected processing temperature in an inert atmosphere with a third selected oxygen partial pressure for a third selected time period, all cooperatively selected to convert at least a portion of the orthorhombic BSCCO phase to the final superconducting BSCCO material.

摘要翻译： 高品质，高Tc BSCCO或（Bi，Pb）SCCO超导体的生产和加工的新工艺首先制造形成包括多个坯料的束，每个坯料含有至少一根细丝，其包含显着量的 具有选定的中间相的四边形BSCCO相，并且基本上被约束金属包围。 通过热力学机械固结所述束以通过在协同选择的条件下对所述束施加压力和热量以在所述金属和所述长丝之间的界面处引起所述约束金属的相互扩散并且基本上完全消除所述束中的空隙而形成多丝前体制品，以及 在对束进行任何高应变纵向变形之前完成固结步骤。 然后将前体制品在具有第二选择的氧分压的惰性气氛中的第二选定处理温度下加热第二选定的时间段，第二处理温度，第二时间段和第二氧分压协同选择以形成 反应混合物中正交的BSCCO相的显着量。 然后可以将其变形以形成具有所需纹理的细长的前体制品; 然后在具有第三选择的氧分压的惰性气氛中在第三选定的处理温度下加热第三选定的时间段，全部协同选择以将至少一部分正交BSCCO相转化为最终超导BSCCO材料。

公开(公告)号：US06188920B1

公开(公告)日：2001-02-13

申请号：US09137733

申请日：1998-08-21

申请人： Qi Li ,  William J. Michels ,  Ronald D. Parrella ,  Gilbert N. Riley, Jr. ,  Mark D. Teplitsky ,  Steven Fleshler

发明人： Qi Li ,  William J. Michels ,  Ronald D. Parrella ,  Gilbert N. Riley, Jr. ,  Mark D. Teplitsky ,  Steven Fleshler

IPC分类号： H01B1200

CPC分类号： H01L39/248 ,  H01L39/2419 ,  Y10S505/742

摘要： The present invention provides a (Bi,Pb)SCCO-2223 oxide superconductor composite which exhibits improved critical current density and critical current density retention in the presence of magnetic fields. Retention of critical current density in 0.1 T fields (77 K, ⊥ ab plane) of greater than 35% is disclosed. Significant improvements in oxide superconductor wire current carrying capacity in a magnetic field are obtained by subjecting the oxide superconductor composite to a post-processing heat treatment which reduces the amount of lead in the (Bi,Pb)SCCO-2223 phase and forms a lead-rich non-superconducting phase. The heat treatment is carried out under conditions which localize the lead-rich phase at high energy sites in the composite.

摘要翻译： 本发明提供了一种（Bi，Pb）SCCO-2223氧化物超导体复合材料，其在磁场存在下表现出改善的临界电流密度和临界电流密度保持。 公开了0.1T场（77K，⊥ab平面）中临界电流密度的保持率大于35％。 通过对氧化物超导体复合物进行后处理热处理，可以减少（Bi，Pb）SCCO-2223相中的铅的量，并形成铅 - 丰富的非超导相。 热处理在复合材料中在高能量位置使富铅相定位的条件下进行。

公开(公告)号：US5798318A

公开(公告)日：1998-08-25

申请号：US651169

申请日：1996-05-21

申请人： Qi Li ,  William J. Michels ,  Ronald D. Parrella ,  Gilbert N. Riley, Jr. ,  Mark D. Teplitsky ,  Steven Fleshler

发明人： Qi Li ,  William J. Michels ,  Ronald D. Parrella ,  Gilbert N. Riley, Jr. ,  Mark D. Teplitsky ,  Steven Fleshler

IPC分类号： C01G1/00 ,  C01G15/00 ,  C01G21/00 ,  C01G30/00 ,  H01B12/04 ,  H01B13/00 ,  H01L39/24 ,  H01B12/02

CPC分类号： H01L39/248 ,  H01L39/2419 ,  Y10S505/742

摘要： The present invention provides a (Bi,Pb)SCCO-2223 oxide superconductor composite which exhibits improved critical current density and critical current density retention in the presence of magnetic fields. Retention of critical current density in 0.1 T fields (77 K, .perp. ab plane) of greater than 35% is disclosed. Significant improvements in oxide superconductor wire current carrying capacity in a magnetic field are obtained by subjecting the oxide superconductor composite to a post-processing heat treatment which reduces the amount of lead in the (Bi,Pb)SCCO-2223 phase and forms a lead-rich non-superconducting phase. The heat treatment is carried out under conditions which localize the lead-rich phase at high energy sites in the composite.

摘要翻译： 本发明提供了一种（Bi，Pb）SCCO-2223氧化物超导体复合材料，其在磁场存在下表现出改善的临界电流密度和临界电流密度保持。 公开了0.1T场（77K，ORTHOGONAL ab平面）中临界电流密度的保持率大于35％。 通过对氧化物超导体复合物进行后处理热处理，可以减少（Bi，Pb）SCCO-2223相中的铅的量，并形成铅 - 丰富的非超导相。 热处理在复合材料中在高能量位置使富铅相定位的条件下进行。

公开(公告)号：US6069116A

公开(公告)日：2000-05-30

申请号：US927006

申请日：1997-09-10

申请人： Qi Li ,  Gilbert N. Riley, Jr. ,  Lawrence J. Masur ,  Eric R. Podtburg ,  Ronald D. Parrella ,  Martin W. Rupich ,  Donald R. Parker ,  William L. Carter ,  William J. Rosati ,  Mark D. Teplitsky

发明人： Qi Li ,  Gilbert N. Riley, Jr. ,  Lawrence J. Masur ,  Eric R. Podtburg ,  Ronald D. Parrella ,  Martin W. Rupich ,  Donald R. Parker ,  William L. Carter ,  William J. Rosati ,  Mark D. Teplitsky

IPC分类号： H01L39/24

CPC分类号： H01L39/248 ,  Y10T29/49014

摘要： A novel process of the production and processing of high quality, high T.sub.c BSCCO or (Bi,Pb)SCCO superconductors starts with fabrication of a forming a bundle including a plurality of billets, each billet containing at least one filament comprising a dominant amount of an tetragonal BSCCO phase with selected intermediate phases, and substantially surrounded by a constraining metal. The bundle is thermomechanically consolidated to form a multifilamentary precursor article by applying pressure and heat to the bundle under conditions cooperatively selected to cause interdiffusion of said constraining metal at the interfaces between said metal and said filaments and substantially complete elimination of voids in said bundle, and the consolidation step is completed before any high strain longitudinal deformation is performed on the bundle. The precursor article is then heated at a second selected processing temperature in an inert atmosphere with a second selected oxygen partial pressure for a second selected time period, the second processing temperature, the second time period and the second oxygen partial pressure being cooperatively selected to form a dominant amount of an orthorhombic BSCCO phase in the reacted mixture. It may then be deformed to form an elongated precursor article of a desired texture; and thereafter heated at a third selected processing temperature in an inert atmosphere with a third selected oxygen partial pressure for a third selected time period, all cooperatively selected to convert at least a portion of the orthorhombic BSCCO phase to the final superconducting BSCCO material.

摘要翻译： 高品质，高Tc BSCCO或（Bi，Pb）SCCO超导体的生产和加工的新工艺首先制造形成包括多个坯料的束，每个坯料含有至少一根细丝，其包含显着量的 具有选定的中间相的四边形BSCCO相，并且基本上被约束金属包围。 通过热力学机械固结所述束以通过在协同选择的条件下对所述束施加压力和热量以在所述金属和所述长丝之间的界面处引起所述约束金属的相互扩散并且基本上完全消除所述束中的空隙而形成多丝前体制品，以及 在对束进行任何高应变纵向变形之前完成固结步骤。 然后将前体制品在具有第二选择的氧分压的惰性气氛中的第二选定处理温度下加热第二选定的时间段，第二处理温度，第二时间段和第二氧分压协同选择以形成 反应混合物中正交的BSCCO相的显着量。 然后可以将其变形以形成具有所需纹理的细长的前体制品; 然后在具有第三选择的氧分压的惰性气氛中在第三选定的处理温度下加热第三选定的时间段，全部协同选择以将至少一部分正交BSCCO相转化为最终超导BSCCO材料。