-
公开(公告)号：US11923105B2
公开(公告)日：2024-03-05
申请号：US17887844
申请日：2022-08-15
Applicant: The University of Houston System
Inventor： Goran Majkic , Venkat Selvamanickam
IPC: H01B12/06 , C23C16/02 , C23C16/40 , C23C16/448 , C23C16/54 , H01B13/00 , H01B13/008 , H10N60/01
CPC classification number: H01B12/06 , C23C16/0209 , C23C16/408 , C23C16/448 , C23C16/545 , H01B13/00 , H01B13/0026 , H01B13/008 , H10N60/0464
Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.
-
公开(公告)号：US11901097B2
公开(公告)日：2024-02-13
申请号：US17288838
申请日：2019-10-28
Applicant: University of Houston System
Inventor： Goran Majkic , Anis Ben Yahia , Wenbo Luo , Venkat Selvamanickam , Soumen Kar
IPC: H01B12/06
CPC classification number: H01B12/06
Abstract: A round superconductor wire and method for fabricating same are disclosed. Embodiments are directed to a round superconductor wire including at least two superconductor tapes wound on a wire former. Each superconductor tape includes: bottom stabilizer and silver layers; substrate disposed above the bottom silver layer; buffer film stack disposed above the substrate; superconductor film disposed above the buffer film stack; top silver layer disposed above the superconductor film; and top stabilizer layer disposed above the top silver layer. At least one of the bottom stabilizer layer, bottom silver layer, substrate, buffer film stack, superconductor film, top silver layer, or top stabilizer layer is of a different width, thickness, or material composition in one of the superconductor tapes than in another of the superconductor tapes. These and other embodiments achieve a round superconductor wire having improved current density in high magnetic field applications when made in small diameters.
-
公开(公告)号：US20230384356A1
公开(公告)日：2023-11-30
申请号：US18141390
申请日：2023-04-29
Applicant: University of Houston System
Inventor： Goran Majkic , Venkat Selvamanickam , Jarek Wosik
CPC classification number: G01R23/02 , H10N60/857 , H01P3/081
Abstract: A method and system for quench detection in high temperature superconductors, such as REBCO (rare-earth barium copper oxide), before thermal runaway. A REBCO superconducting tape is excited as a transmission line forming standing waves. A quench may then be detected in response to detecting a disturbance of the standing waves. In this manner, quench in high temperature superconductors, such as REBCO, is rapidly detected before thermal runaway.
-
公开(公告)号：US20230232723A1
公开(公告)日：2023-07-20
申请号：US14328120
申请日：2014-07-10
Applicant: The University of Houston System
Inventor： Jarek Wosik , Jerzy Krupka , Venkat Selvamanickam
CPC classification number: G01R33/1246 , G01R33/007 , H10N60/203
Abstract: A method and apparatus for quality control of superconducting tapes, comprising non-destructive and non-contact methods for measuring the surface resistance of a superconducting tape during tape growth. The dielectric resonator techniques of the present invention can be adapted for measurements at the elevated temperatures used during annealing as well as at room and lower temperatures, providing the opportunity for real-time quality control of semiconductor tapes as they are being fabricated.
-
公开(公告)号：US11488746B2
公开(公告)日：2022-11-01
申请号：US17074223
申请日：2020-10-19
Applicant: The University of Houston System
Inventor： Venkat Selvamanickam
Abstract: A REBCO superconductor tape that can achieve a lift factor greater than or equal to approximately 3.0 or 4.0 in an approximately 3 T magnetic field applied perpendicular to a REBCO tape at approximately 30 K. In an embodiment, the REBCO superconductor tape can include a critical current density less than or equal to approximately 4.2 MA/cm2 at 77 K in the absence of an external magnetic field. In another embodiment, the REBCO superconductor tape can include a critical current density greater than or equal to approximately 12 MA/cm2 at approximately 30 K in a magnetic field of approximately 3 T having an orientation parallel to a c-axis.
-
Patent Agency Ranking
公开(公告)号：US11417444B2
公开(公告)日：2022-08-16
申请号：US16930529
申请日：2020-07-16
Applicant: The University of Houston System
Inventor： Goran Majkic , Venkat Selvamanickam
IPC: H01B12/06 , H01B13/00 , C23C16/02 , H01L39/24 , C23C16/40 , C23C16/54 , C23C16/448 , H01B13/008
Abstract: An MOCVD system fabricates high quality superconductor tapes with variable thicknesses. The MOCVD system can include a gas flow chamber between two parallel channels in a housing. A substrate tape is heated and then passed through the MOCVD housing such that the gas flow is perpendicular to the tape's surface. Precursors are injected into the gas flow for deposition on the substrate tape. In this way, superconductor tapes can be fabricated with variable thicknesses, uniform precursor deposition, and high critical current densities.
-
公开(公告)号：US11309480B2
公开(公告)日：2022-04-19
申请号：US15573632
申请日：2016-05-11
Applicant: The University of Houston System
Inventor： Venkat Selvamanickam
Abstract: An ultra-thin film superconducting tape and method for fabricating same is disclosed. Embodiments are directed to a superconducting tape being fabricated by processes which include removing a portion of the superconducting tape's substrate subsequent the substrate's initial formation, whereby a thickness of the superconducting tape is reduced to 15-80 μm.
-
公开(公告)号：US20210358660A1
公开(公告)日：2021-11-18
申请号：US17288838
申请日：2019-10-28
Applicant: University of Houston System
Inventor： Goran Majkic , Anis Ben Yahia , Wenbo Luo , Venkat Selvamanickam , Soumen Kar
IPC: H01B12/06
Abstract: A round superconductor wire and method for fabricating same are disclosed. Embodiments are directed to a round superconductor wire including at least two superconductor tapes wound on a wire former. Each superconductor tape includes: bottom stabilizer and silver layers; substrate disposed above the bottom silver layer; buffer film stack disposed above the substrate; superconductor film disposed above the buffer film stack; top silver layer disposed above the superconductor film; and top stabilizer layer disposed above the top silver layer. At least one of the bottom stabilizer layer, bottom silver layer, substrate, buffer film stack, superconductor film, top silver layer, or top stabilizer layer is of a different width, thickness, or material composition in one of the superconductor tapes than in another of the superconductor tapes. These and other embodiments achieve a round superconductor wire having improved current density in high magnetic field applications when made in small diameters.
-
公开(公告)号：US20210104340A1
公开(公告)日：2021-04-08
申请号：US17074223
申请日：2020-10-19
Applicant: The University of Houston System
Inventor： Venkat Selvamanickam
Abstract: A REBCO superconductor tape that can achieve a lift factor greater than or equal to approximately 3.0 or 4.0 in an approximately 3 T magnetic field applied perpendicular to a REBCO tape at approximately 30 K. In an embodiment, the REBCO superconductor tape can include a critical current density less than or equal to approximately 4.2 MA/cm2 at 77 K in the absence of an external magnetic field. In another embodiment, the REBCO superconductor tape can include a critical current density greater than or equal to approximately 12 MA/cm2 at approximately 30 K in a magnetic field of approximately 3 T having an orientation parallel to a c-axis.
-
公开(公告)号：US20150357088A1
公开(公告)日：2015-12-10
申请号：US13907356
申请日：2013-05-31
Applicant: UNIVERSITY OF HOUSTON SYSTEM
Inventor： Venkat Selvamanickam
CPC classification number: H01B12/06 , H01B13/0036 , H01L39/126 , H01L39/247
Abstract: Disclosed is a superconducting article comprising a silver overlayer consisting of no more than about 20% of grains over about 1 μm, having a minimum Vickers micro-hardness value of about 100, and a porosity of less than about 1%. A method of manufacturing a superconducting tape is disclosed as comprising, deposition of silver, oxygenation at about 400° C. for about 30 minutes, slitting, deposition of silver at a temperature of less than about 250° C., and application of copper.
Abstract translation: 公开了一种超导制品，其包含由约1μm以上的不超过约20％的晶粒构成的银覆盖层，具有约100的最小维氏显微硬度值和小于约1％的孔隙率。 公开了一种制造超导带的方法，包括：在约400℃下氧化约30分钟，在小于约250℃的温度下切割银，沉积银，并施加铜。
-
-
-
-
-
-
-
-
-
Search Results
53
records
(took 0.037 seconds)
