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    Large strongly linked superconducting monoliths and process for making the same
    1.
    发明授权
    Large strongly linked superconducting monoliths and process for making the same 有权

    公开(公告)号：US06429174B1

    公开(公告)日：2002-08-06

    申请号：US09754134

    申请日：2001-01-03

    申请人： Suvankar Sengupta

    发明人： Suvankar Sengupta

    IPC分类号： H01L3900

    摘要： A process which relies on a joining technique between two individual strongly linked superconductors is disclosed. Specifically, this invention relates to fabrication of single domains of YBa2Cu3Ox or YBa2Cu3Ox with the addition of Y2BaCuO5 and/or other secondary phases such as Pt/PtO2, CeO2, SnO2, Ag, Y2O3 and other rare earth oxides, by using a top-seeded, melt processing technique. Beginning with a single crystal seed such as Nd1+xBa2−xCu3Ox or SmBa2Cu3Ox crystals, a melt-textured YBCO domain with crystallographic orientation nearly similar to that of the seed crystal can be fabricated. The samples are next machined to desired geometrical shapes. A bonding material is then applied to the ac plane. Low solidification or recrystalization point, similar crystal structure to that of YBa2Cu3Ox, and capability of growing epitaxially on YBCO domains are critical parameters of the bonding material. The pre-bonded samples are then heat treated such that the bonding material grows epitaxially on the ac plane of YBCO domains resulting in a strongly linked joint. A small amount of pressure may be used to keep neighboring domains together.

    Method for harvesting single crystals from a peritectic melt
    2.
    发明授权
    Method for harvesting single crystals from a peritectic melt 失效
    从包晶熔体中收获单晶的方法

    公开(公告)号：US5549748A

    公开(公告)日：1996-08-27

    申请号：US372042

    申请日：1995-01-12

    申请人： Volker R. Todt ,  Suvankar Sengupta ,  Donglu Shi

    发明人： Volker R. Todt ,  Suvankar Sengupta ,  Donglu Shi

    IPC分类号： C30B11/02 ,  C30B9/00 ,  C30B29/22 ,  C30B19/04

    CPC分类号： C30B29/225 ,  C30B9/00

    摘要： A method of preparing single crystals. The method of preparation involves preparing precursor materials of a particular composition, heating the precursor material to achieve a peritectic mixture of peritectic liquid and crystals, cooling the peritectic mixture to quench directly the mixture on a porous, wettable inert substrate to wick off the peritectic liquid, leaving single crystals on the porous substrate. Alternatively, the peritectic mixture can be cooled to a solid mass and reheated on a porous, inert substrate to melt the matrix of peritectic fluid while leaving the crystals unmelted, allowing the wicking away of the peritectic liquid.

    摘要翻译： 制备单晶的方法。 制备方法包括制备特定组合物的前体材料，加热前体材料以实现包晶液体和晶体的包晶混合物，冷却包晶混合物以直接将多孔，可润湿的惰性基底上的混合物骤冷以除去包晶液体 在多孔基底上留下单晶。 或者，可以将包晶混合物冷却至固体物质并在多孔的惰性基材上再加热以熔化包晶液体的基质，同时使晶体未熔化，从而使包晶液体吸走。

    Method for harvesting rare earth barium copper oxide single crystals
    3.
    发明授权
    Method for harvesting rare earth barium copper oxide single crystals 失效
    收集稀土钡铜氧化物单晶的方法

    公开(公告)号：US5504060A

    公开(公告)日：1996-04-02

    申请号：US372067

    申请日：1995-01-12

    申请人： Volker R. Todt ,  Suvankar Sengupta ,  Donglu Shi

    发明人： Volker R. Todt ,  Suvankar Sengupta ,  Donglu Shi

    IPC分类号： C30B9/00 ,  H01L39/24 ,  H01L39/12

    CPC分类号： C30B29/225 ,  C30B9/00 ,  H01L39/2419 ,  Y10S505/729

    摘要： A method of preparing high temperature superconductor single crystals. The method of preparation involves preparing precursor materials of a particular composition, heating the precursor material to achieve a peritectic mixture of peritectic liquid and crystals of the high temperature superconductor, cooling the peritectic mixture to quench directly the mixture on a porous, wettable inert substrate to wick off the peritectic liquid, leaving single crystals of the high temperature superconductor on the porous substrate. Alternatively, the peritectic mixture can be cooled to a solid mass and reheated on a porous, inert substrate to melt the matrix of peritectic fluid while leaving the crystals melted, allowing the wicking away of the peritectic liquid.

    摘要翻译： 制备高温超导体单晶的方法。 制备方法包括制备特定组合物的前体材料，加热前体材料以实现包晶液体和高温超导体的晶体的包晶混合物，冷却包晶混合物以直接将多孔，可湿润的惰性基底上的混合物骤冷至 将包晶液体取出，将高温超导体的单晶留在多孔基材上。 或者，可以将包晶混合物冷却至固体物质并在多孔的惰性基材上再加热以熔化包晶液体的基质，同时使晶体熔化，从而使包晶液体吸走。

    BULK THERMOELECTRIC COMPOSITIONS FROM COATED NANOPARTICLES
    6.
    发明申请
    BULK THERMOELECTRIC COMPOSITIONS FROM COATED NANOPARTICLES 审中-公开
    来自涂层纳米颗粒的大块热电组合物

    公开(公告)号：US20090218551A1

    公开(公告)日：2009-09-03

    申请号：US12095476

    申请日：2006-11-29

    申请人： Suvankar Sengupta ,  Ramachandra R. Revur ,  Troy Pyles

    发明人： Suvankar Sengupta ,  Ramachandra R. Revur ,  Troy Pyles

    IPC分类号： H01B1/10 ,  H01B1/06 ,  B05D5/12 ,  H01B1/22 ,  B22F1/02

    CPC分类号： H01L35/26 ,  B82Y10/00 ,  H01L35/16 ,  H01L35/34

    摘要： The invention provides a dense bulk thermoelectric composition containing a plurality of nanometer-sized particles of a thermoelectric material. The bulk composition provides thermoelectric power up to 550 μV/° C. In some embodiments, the surface of each particle is coated by another thermoelectric material. The size of the particles ranges from about 5 nm to about 500 nm. The density of thermoelectric composition ranges from about 80% to about 100% of theoretical density.

    摘要翻译： 本发明提供一种包含多个纳米尺寸的热电材料颗粒的密集体热电组合物。 本体组合物提供高达550μV/℃的热电功率。在一些实施例中，每个颗粒的表面被另一种热电材料涂覆。 颗粒的尺寸范围为约5nm至约500nm。 热电组合物的密度范围为理论密度的约80％至约100％。

    Large, strongly linked superconducting monoliths and process for making the same
    7.
    发明授权
    Large, strongly linked superconducting monoliths and process for making the same 失效
    大型，紧密连接的超导整体和制造相同的工艺

    公开(公告)号：US06258754B1

    公开(公告)日：2001-07-10

    申请号：US09116837

    申请日：1998-07-16

    申请人： Suvankar Sengupta

    发明人： Suvankar Sengupta

    IPC分类号： B05D512

    CPC分类号： H01L39/2419 ,  C30B29/22 ,  C30B29/225 ,  C30B33/00 ,  C30B33/06 ,  H01L39/02

    摘要： A process which relies on a joining technique between two individual strongly linked superconductors is disclosed. Specifically, this invention relates to fabrication of single domains of YBa2Cu3Ox or YBa2Cu3Ox with the addition of Y2BaCuO5 and/or other secondary phases such as Pt/PtO2, CeO2, SnO2, Ag, Y2O3 and other rare earth oxides, by using a top-seeded, melt processing technique. Beginning with a single crystal seed such as Nd1+xBa2−xCu3O3 or SmBa2Cu3Ox crystals, a melt-textured YBCO domain with crystallographic orientation nearly similar to that of the seed crystal can be fabricated. The samples are next machined to desired geometrical shapes. A bonding material is then applied to the ac plane. Low solidification or recrystalization point, similar crystal structure to that of YBa2Cu3Ox, and capability of growing epitaxially on YBCO domains are critical parameters of the bonding material. The pre-bonded samples are then heat treated such that the bonding material grows epitaxially on the ac plane of YBCO domains resulting in a strongly linked joint. A small amount of pressure may be used to keep neighboring domains together.

    摘要翻译： 公开了依赖于两个单独的强连接超导体之间的接合技术的方法。 具体地说，本发明涉及通过使用顶部种子来制备YBa2Cu3Ox或YBa2Cu3Ox的单畴，通过添加Y2BaCuO5和/或其它二相如Pt / PtO 2，CeO 2，SnO 2，Ag，Y 2 O 3等稀土氧化物 ，熔融加工技术。 从单晶晶体如Nd1 + xBa2-xCu3O3或SmBa2Cu3Ox晶体开始，可以制造具有与晶种几乎相似的晶体取向的熔融织构的YBCO晶畴。 样品接下来加工成所需的几何形状。 然后将接合材料施加到交流平面。 低固化或重结晶点，与YBa2Cu3Ox相似的晶体结构，以及在YBCO畴上外延生长的能力是接合材料的关键参数。 然后将预结合的样品进行热处理，使得接合材料在YBCO畴的交流平面上外延生长，形成牢固连接的接头。 可以使用少量的压力来将相邻的畴保持在一起。

    Large single domain 123 material produced by seeding with single crystal rare earth barium copper oxide single crystals
    9.
    发明授权
    Large single domain 123 material produced by seeding with single crystal rare earth barium copper oxide single crystals 失效
    通过单晶稀土钡氧化铜单晶接种生产的大单晶123材料

    公开(公告)号：US5776864A

    公开(公告)日：1998-07-07

    申请号：US834687

    申请日：1997-04-01

    申请人： Volker Todt ,  Dean J. Miller ,  Donglu Shi ,  Suvankar Sengupta

    发明人： Volker Todt ,  Dean J. Miller ,  Donglu Shi ,  Suvankar Sengupta

    IPC分类号： C04B35/45 ,  H01L39/24 ,  H01L39/12 ,  C04B35/653

    CPC分类号： C04B35/4508 ,  H01L39/2419 ,  Y10S505/729

    摘要： A method of fabricating bulk YBa.sub.2 Cu.sub.3 O.sub.x where compressed powder oxides and/or carbonates of Y and Ba and Cu present in mole ratios to form YBa.sub.2 Cu.sub.3 O.sub.x are heated in the presence of a Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.y seed crystal to a temperature sufficient to form a liquid phase in the YBa.sub.2 Cu.sub.3 O.sub.x while maintaining the seed crystal solid. The materials are slowly cooled to provide a YBa.sub.2 Cu.sub.3 O.sub.x material having a predetermined number of domains between 1 and 5. Crack-free single domain materials can be formed using either plate shaped seed crystals or cube shaped seed crystals with a pedestal of preferential orientation material.

    摘要翻译： 一种制造本体YBa2Cu3Ox的方法，其中Y和Ba和Cu的压缩粉末氧化物和/或碳酸盐以摩尔比形成YBa 2 Cu 3 O x的摩尔比在Nd1 + xBa2-xCu3Oy晶种存在下加热至足以形成液相的温度 在YBa2Cu3Ox中保持晶种固体。 将材料缓慢冷却以提供具有1至5之间预定数量的结构域的YBa2Cu3Ox材料。可以使用具有优先取向材料的基座的板状晶种或立方体晶种形成无裂纹单畴材料。

    CEMENT AND METHODS OF PREPARING CEMENT
    10.
    发明申请
    CEMENT AND METHODS OF PREPARING CEMENT 失效
    水泥和水泥的制备方法

    公开(公告)号：US20100175588A1

    公开(公告)日：2010-07-15

    申请号：US12528753

    申请日：2008-02-26

    申请人： Richard J. Schorr ,  Suvankar Sengupta ,  Richard L. Helferich ,  Gary M. Gordon ,  Debabrata Rautaray

    发明人： Richard J. Schorr ,  Suvankar Sengupta ,  Richard L. Helferich ,  Gary M. Gordon ,  Debabrata Rautaray

    IPC分类号： C04B7/00 ,  C04B7/32 ,  C04B14/02 ,  C04B18/06 ,  C04B18/10 ,  C04B7/14 ,  C04B7/43 ,  C04B28/14 ,  C04B7/36 ,  C04B28/04

    CPC分类号： C04B7/527 ,  Y02P40/20 ,  Y10T428/2982

    摘要： Cement compositions and methods for making cement compositions are provided. The cement compositions can comprise at least one oxide having a particle size of less than about 600 nm. The methods for making cement may include: providing a mixture of compounds containing the required calcium, silicon, aluminum, and iron to provide at least one of tricalcium silicate, dicalcium silicate, tricalcium aluminate, tetracalcium aluminoferrite, other calcium silicates, aluminates, ferrites, and silicates or combinations thereof; adding a fuel source and an oxidizer to the mixture of compounds; and heating the mixture of compounds, the fuel source, and the oxidizer such that the mixture of compounds, the fuel source, and the oxidizer ignite to form the at least one tricalcium silicate, dicalcium silicate, tricalcium aluminate, and tetracalcium aluminoferrite, or combinations thereof,

    摘要翻译： 提供水泥组合物和制备水泥组合物的方法。 水泥组合物可以包含至少一种粒度小于约600nm的氧化物。 制备水泥的方法可以包括：提供含有所需钙，硅，铝和铁的化合物的混合物，以提供硅酸三钙，硅酸二钙，铝酸钙，铝酸钙，其他硅酸钙，铝酸盐，铁氧体， 硅酸盐或其组合; 向化合物的混合物中加入燃料源和氧化剂; 以及加热化合物，燃料源和氧化剂的混合物，使得化合物，燃料源和氧化剂的混合物点燃以形成至少一种硅酸三钙，硅酸二钙，铝酸钙三钙和铝铁氧化物四铝，或组合 其中，