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公开(公告)号：US07018954B2
公开(公告)日：2006-03-28
申请号：US10094076
申请日：2002-03-08
CPC分类号： H01L39/141 , H01L39/2487 , Y10T29/49014
摘要： Processes for the fabrication of MgB2 powder and wires are provided. Powders are produced by mechanically alloying magnesium- and boron-containing precursors under controlled conditions to avoid secondary phase and impurity formation. Powders are also prepared by vapor phase reaction of volatile magnesium- and boron-containing precursors. Wires, tapes, films and coatings are provided.
摘要翻译： 提供了制造MgB 2粉末和电线的方法。 在控制条件下通过机械合金化含镁和硼的前体来制备粉末，以避免二次相和杂质的形成。 粉末也是通过挥发性镁和硼的前体的气相反应制备的。 提供电线，胶带，薄膜和涂层。
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公开(公告)号：US06620768B2
公开(公告)日：2003-09-16
申请号：US09960189
申请日：2001-09-21
IPC分类号： H01B1200
CPC分类号： C04B35/65 , C04B35/4521 , C04B35/4525 , H01L39/2419 , H01L39/248 , Y10S505/736 , Y10S505/785 , Y10T29/49014
摘要： A novel process of the production and processing of high quality, high Tc (Bi,Pb)SCCO superconductors starts with fabrication of a precursor article including selected intermediate phases with desired chemical and structural properties. The precursor fabrication includes mixing raw powders with a desired ratio of Bi:Pb:Sr:Ca:Cu elements and reacting the mixture under different selected reaction conditions that form a precursor powder with a dominant (Bi, Pb)SCCO 2212 phase and without Ca—Pb—O phase, wherein the 2212 phase may be the orthorhombic 2212 phase. The precursor article is then subjected to optimized reaction and mechanical deformation processes that lead to a reaction induced texturing and deformation induced texturing, respectively. A heating process is used to convert the precursor powder to the 2223 phase and subsequent deformation and annealing processes may be used to form a substantially single phase, highly textured (Bi, Pb)SCCO 2223 superconductor with high Jc.
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公开(公告)号：US06436876B1
公开(公告)日：2002-08-20
申请号：US09861248
申请日：2001-05-18
IPC分类号： C04B3564
CPC分类号： H01L39/2464 , Y10S505/742 , Y10S505/782 , Y10S505/785
摘要： A method for preparing a BSCCO-2223 oxide superconducting article includes annealing an oxide superconductor article comprised of BSCCO-2223 oxide superconductor at a temperature selected from the range of about 500° C.≦T≦787° C. and an annealing atmosphere having an oxygen pressure selected from within the region having a lower bound defined by the equation, PO2(lower)≧3.5×1010 exp(−32,000/T+273) and an upper bound defined by the equation, PO2(upper)≦1.1×1012 exp(−32,000/T+273). The article is annealed for a time sufficient to provide at least a 10% increase in critical current density as compared to the critical current density of the pre-anneal oxide superconductor article. An oxide superconductor having the formula Bi2−yPbySr2Ca2Cu3O10+x, where 0≦x≦1.5 and where 0≦y≦0.6 is obtained, the oxide superconductor characterized by a critical transition temperature of greater than 111.0 K, as determined by four point probe method.
摘要翻译： 制备BSCCO-2223氧化物超导制品的方法包括在选自约500℃的温度范围内对由BSCCO-2223氧化物超导体组成的氧化物超导体制品进行退火。<= T <= 787℃和退火气氛 PO2（下）> = 3.5×10 10 exp（-32,000 / T + 273）和由上式定义的上限的PO2（上）<= 1.1×1012 exp（-32,000 / T + 273）。 与预退火氧化物超导体制品的临界电流密度相比，该制品退火足以提供临界电流密度至少10％的时间。 具有式Bi2-yPbySr2Ca2Cu3O10 + x的氧化物超导体，其中0 <= x <= 1.5，其中0 <= y <= 0.6，所述氧化物超导体的特征在于临界转变温度大于111.0K，如由 四点探针法。
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34.发明授权Oxide bronze compositions and textured articles manufactured in accordance therewith 失效氧化青铜组合物和根据其制造的织纹制品公开(公告)号：US06436317B1
公开(公告)日：2002-08-20
申请号：US09579193
申请日：2000-05-26
IPC分类号： H01B102
CPC分类号： H01L39/2403 , C04B35/495 , H01L39/125 , H01L39/143 , Y10S505/701 , Y10S505/704
摘要： Oxide bronze compositions and articles manufactured in accordance therewith are provided. The oxide bronze compositions have the general formula AxBOy, in which A comprises an alkali, alkaline earth or rare earth metal and in which A has a valence, m, equal to 1, 2 or 3, B comprises a transition metal having a valence, n, less than or equal to 6,0
摘要翻译： 提供氧化青铜组合物和根据其制造的制品。 氧化物青铜组合物具有通式AxBOy，其中A包含碱金属，碱土金属或稀土金属，其中A具有等于1,2或3的化合价，B包括具有化合价的过渡金属， n，以原子比为基准小于或等于6,0
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公开(公告)号：US06284979B1
公开(公告)日：2001-09-04
申请号：US08851719
申请日：1997-05-05
申请人： Alexis P. Malozemoff , Gregory L. Snitchler , William L. Barnes , Alexander Otto , Gilbert N. Riley, Jr. , Jeffrey M. Seuntjens
发明人： Alexis P. Malozemoff , Gregory L. Snitchler , William L. Barnes , Alexander Otto , Gilbert N. Riley, Jr. , Jeffrey M. Seuntjens
IPC分类号： H01B1210
CPC分类号： H01L39/143
摘要： A cabled conductor is provided for use in a cryogenically cooled circuit including refrigeration having a predetermined operating temperature and efficiency. The conductor includes multiple conductor strands cabled about the longitudinal axis of the conductor at a preselected cabling period, each strand including a composite of superconducting ceramic in intimate contact with conductive matrix material. Each filament has high performance regions in which the filament material is well-textured with its preferred direction aligned perpendicular to the widest longitudinal cross-section of the conductor alternating with poorly superconducting regions which are at least about half the diameter of a filament in length and in which the superconducting ceramic filament is strained by transposition in excess of its critical strain limit. In the poorly superconducting regions, the conductive matrix material provides an alternate current path. The ratio of the average length of the poorly superconducting regions to the preselected cabling period is less than about (&rgr;300e/&rgr;oe)&egr;E, where &rgr;oe is the resistivity of the composite at the operating temperature; &rgr;300e is the resistivity of the composite at 300 Kelvins; and &egr; is the predetermined efficiency of the refrigeration means at its operating temperature. In the preferred embodiment, this ratio is less than 1:4, and preferably less than 1:20.
摘要翻译： 提供一种用于低温冷却回路中的电缆导体，包括具有预定工作温度和效率的制冷。 导体包括在预选布线周期围绕导体的纵向轴线布置的多个导线，每个线包括与导电基体材料紧密接触的超导陶瓷的复合材料。 每个灯丝具有高性能区域，其中长丝材料具有良好的织构，其优选的方向垂直于导体的最宽纵向横截面排列，与导体长度的至少约一半长度的不良超导区交替， 其中超导陶瓷细丝通过转移超过其临界应变极限而变形。 在较差的超导区域中，导电基体材料提供了交替的电流路径。 不良超导区域的平均长度与预选布线周期的比值小于约（rho300e / rhooe）epsiE，其中r为复合材料在工作温度下的电阻率; rho300e是300 Kelvins的复合材料的电阻率; 而epsi是制冷装置在其工作温度下的预定效率。 在优选实施方案中，该比率小于1:4，优选小于1:20。
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公开(公告)号：US5942466A
公开(公告)日：1999-08-24
申请号：US467033
申请日：1995-06-06
申请人： Qi Li , Eric R. Podtburg , Patrick John Walsh , William L. Carter , Gilbert N. Riley, Jr. , Martin W. Rupich , Elliott Thompson , Alexander Otto
发明人： Qi Li , Eric R. Podtburg , Patrick John Walsh , William L. Carter , Gilbert N. Riley, Jr. , Martin W. Rupich , Elliott Thompson , Alexander Otto
CPC分类号： C04B35/4521 , C04B35/4525 , C04B35/65 , H01L39/2419 , H01L39/248 , Y10T29/49014
摘要： A novel process of the production and processing of high quality, high T.sub.c (Bi,Pb)SCCO superconductors starts with fabrication of a precursor article including selected intermediate phases with desired chemical and structural properties. The precursor fabrication includes introducing the reacted mixture having a dominant amount of the tetragonal BSCCO phase into a metal sheath, and sealing the reacted mixture within said sheath, heating the mixture 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 and the second oxygen partial pressure being cooperatively selected to form a dominant amount of an orthorhombic BSCCO phase in the reacted mixture. The sealed sheath is 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. The third processing temperature and third oxygen partial pressure are cooperatively selected to convert at least a portion of the orthorhombic BSCCO phase to the final superconducting BSCCO material.
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公开(公告)号：US5635456A
公开(公告)日：1997-06-03
申请号：US41822
申请日：1993-04-01
IPC分类号： H01L39/24 , C04B35/64 , C04B35/50 , C04B35/653 , H01B12/00
CPC分类号： H01L39/2464 , Y10S505/739 , Y10S505/742
摘要： A method for preparing an oxide superconductor article includes exposing the article after deformation of the article to a final heat treatment having the steps of (a) heating the article at a temperature sufficient to partially melt the article, such that a liquid phase co-exists with the desired oxide superconductor phase; and (b) cooling to and holding the article at a temperature sufficient to transform the liquid phase into the desired oxide superconductor, where no deformation occurs after the final heat treatment. The liquid phase of step (a) wets surfaces of a defect contained within the mixed phase, whereby upon transformation of the liquid in step (b) to the desired oxide superconductor, the defect is healed.
摘要翻译： 制备氧化物超导体制品的方法包括在制品变形之后使制品暴露于最终热处理，其具有以下步骤：（a）在足以部分熔化制品的温度下加热制品，使得液相共存 具有所需的氧化物超导体相; 和（b）在足以将液相转变成期望的氧化物超导体的温度下冷却并保持制品，其中在最终热处理后不发生变形。 步骤（a）的液相润湿包含在混合相中的缺陷的表面，由此在将步骤（b）中的液体转化为所需氧化物超导体时，缺陷得到愈合。
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公开(公告)号：US5472527A
公开(公告)日：1995-12-05
申请号：US82093
申请日：1993-06-24
CPC分类号： H01L39/248 , C04B35/45 , C04B35/65 , Y10S148/035 , Y10S428/93 , Y10S505/704 , Y10S505/736 , Y10S505/785
摘要： A method for forming unsegregated metal oxide-silver composites includes preparing a precursor alloy comprising silver and precursor elements of a desired metal oxide and oxidizing the alloy under conditions of high oxygen activity selected to permit diffusion of oxygen into silver while significantly restricting the diffusion of the precursor elements into silver, such that oxidation of the precursor elements to the metal oxide occurs before diffusion of the metallic elements into silver. Further processing of the metal oxide composite affords an oxide superconducting composite with a highly unsegregated microstructure.
摘要翻译： 用于形成未分离的金属氧化物 - 银复合物的方法包括制备包含银的前体合金和期望的金属氧化物的前体元素，并在选择高氧活性的条件下氧化合金，以允许氧扩散到银中，同时显着地限制 前体元素变成银，使得在将金属元素扩散到银之前，前体元素氧化成金属氧化物。 金属氧化物复合物的进一步处理提供具有高度未偏析的微结构的氧化物超导复合材料。
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公开(公告)号：US09972423B2
公开(公告)日：2018-05-15
申请号：US14898302
申请日：2014-06-10
发明人： Alexander Otto , Kouhei Yamazaki
CPC分类号： H01B12/06 , C22C30/00 , H01L39/143 , H01L39/2454 , H01L39/248
摘要： Reinforced materials for high temperature superconducting tape. More specifically reinforcement materials for significantly reducing the amount of required reinforcement and attaining much higher stress tolerances at practical conductor dimensions are described herein.
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公开(公告)号：US20160260526A1
公开(公告)日：2016-09-08
申请号：US15043087
申请日：2016-02-12
申请人： Alexander Otto
发明人： Alexander Otto
CPC分类号： H01B12/10 , H01B13/0016 , H01B13/0036 , H01L39/143 , H01L39/248
摘要： Methods and devices involving 2212 multifilament superconducting wire with resistance sleeves. More specifically, methods and devices including high resistance sleeves around individual, unmerged filaments or filament bundles, with axial twist, and with round or rectangular wire shape for lower losses in and ramped fields.
摘要翻译： 涉及2212复丝超导线的电阻套管的方法和装置。 更具体地，包括围绕单个，未熔合的长丝或长丝束的高阻力套筒的轴向扭转的方法和装置，并且具有圆形或矩形线形，用于降低和斜坡场中的损失。
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