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21. 发明授权

US5455223A Coated precursor powder for oxide superdonductors 失效
标题翻译：氧化物超导体的涂覆前体粉末
公开(公告)号：US5455223A
公开(公告)日：1995-10-03
申请号：US21768
申请日：1993-02-24
申请人： Martin Rupich , Gilbert N. Riley, Jr. , William L. Carter
发明人： Martin Rupich , Gilbert N. Riley, Jr. , William L. Carter
IPC分类号： C01B13/14 , C01G1/00 , C01G15/00 , C01G29/00 , C04B35/45 , C04B35/628 , H01L39/24 , H01B12/00 , H01L39/12
CPC分类号： C04B35/62886 , C04B35/4512 , C04B35/4521 , C04B35/4525 , C04B35/62805 , H01L39/2477 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3281 , C04B2235/3296 , C04B2235/3298 , C04B2235/441 , C04B2235/5292 , Y10S505/734 , Y10S505/739 , Y10S505/785 , Y10S505/812 , Y10T428/2991
摘要： In one aspect, the present invention is a precursor powder to an oxide superconductor, namely a coated particle comprising a metal oxide particle core (including a mixed metal oxide, e.g., BSCCO-2212 or YBCO-123) on which is deposited a secondary metal oxide coating (e.g., M.sub.n CuO.sub.x or CuO). The metal oxide particle and secondary metal oxide coating together comprise metallic elements having a stoichiometry appropriate for the formation of a desired oxide superconductor. The metal oxide reacts with the secondary metal oxide under suitable conditions (e.g., heating) to form the desired oxide superconductor (e.g., BSCCO-2223 or YBCO-124). In another aspect, the invention is a method for preparing such a coated particle, comprising: preparing a precursor solution comprising a metal .mu.-oxo alkoxide containing metallic constituents of an oxide coating; dispersing a metal oxide powder into said precursor solution; removing excess solvent from said precursor solution, thereby depositing a precursor film comprising said metallic constituents of said oxide coating on said mixed oxide powder; and decomposing said precursor film to form said metal oxide coating. Also encompassed is a method of forming a textured oxide superconductor of desired form.
摘要翻译：一方面，本发明是氧化物超导体的前体粉末，即包含金属氧化物粒子芯（包括混合金属氧化物，例如BSCCO-2212或YBCO-123）的涂覆颗粒，其上沉积有二次金属氧化物涂层（例如MnCuOx或CuO）。金属氧化物颗粒和二次金属氧化物涂层一起包括具有适于形成所需氧化物超导体的化学计量的金属元素。金属氧化物在合适的条件（例如加热）下与二次金属氧化物反应形成所需的氧化物超导体（例如，BSCCO-2223或YBCO-124）。另一方面，本发明是制备这种涂覆颗粒的方法，包括：制备包含含有氧化物涂层的金属成分的金属茂氧化物醇的前体溶液; 将金属氧化物粉末分散到所述前体溶液中; 从所述前体溶液中除去多余的溶剂，由此将包含所述氧化物涂层的所述金属成分的前体膜沉积在所述混合氧化物粉末上; 并分解所述前体膜以形成所述金属氧化物涂层。还包括形成所需形式的织构氧化物超导体的方法。

22. 发明授权

US06370762B1 Method of making a multifilamentary super-conducting article 失效
标题翻译：制作多丝超导物品的方法
公开(公告)号：US06370762B1
公开(公告)日：2002-04-16
申请号：US08651688
申请日：1996-05-21
申请人： Qi Li , Theodore S. Greene , Gilbert N. Riley, Jr. , William J. Michels , William L. Carter
发明人： Qi Li , Theodore S. Greene , Gilbert N. Riley, Jr. , William J. Michels , William L. Carter
IPC分类号： H01L3924
CPC分类号： H01L39/248 , Y10T29/49014
摘要： A reduced coefficient of friction, preferably created by ideal lubrication conditions, may advantageously be employed in the breakdown deformation of a precursor to a multifilamentary superconducting composite, particularly in combination with one or more high reduction breakdown drafts, to improve composite homogeneity and significantly increase the range of deformation conditions over which dimensional tolerances and Je may be optimized. Precursor composites made by this method exhibit reduced microhardness variability and fewer and less serious transverse filament defects than composites made by prior art methods. The method comprises the steps of: first, providing a precursor article comprising a metal matrix surrounding a plurality of filaments extending along the length of the article and comprising precursors to a desired superconducting ceramic; next, roll working the precursor article during a breakdown stage at a predetermined pressure and a coefficient of friction less than about 0.2, preferably less than 0.01, and preferably less than about 0.001 during each roll working draft, and, then, sintering the rolled article to obtain the desired superconducting ceramic. The coefficient of friction is preferably obtained by interposing a lubricant between the precursor article and one or more rolls, most preferably under conditions which create ideal lubrication conditions.
摘要翻译：优选地，通过理想的润滑条件产生的减小的摩擦系数可以有利地用于前体与多丝超导复合材料的击穿变形，特别是与一种或多种高还原击穿气流组合，以提高复合材料均匀性并显着增加尺寸公差和Je可以优化的变形条件范围。通过该方法制备的前体复合材料显示出比现有技术方法制备的复合材料显微硬度变化性和越来越少的横向丝缺陷。该方法包括以下步骤：首先，提供包含金属基体的前体制品，所述金属基质围绕沿着所述制品的长度延伸的多根长丝，并且包括所需超导陶瓷的前体; 接下来，在每个轧制工作牵伸期间以预定压力和摩擦系数小于约0.2，优选小于0.01，优选小于约0.001的击穿阶段对前体制品进行辊加工，然后烧结轧制制品以获得所需的超导陶瓷。摩擦系数优选通过在前体制品和一个或多个辊之间插入润滑剂，最优选在产生理想的润滑条件的条件下来获得。

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