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  • Books
  • Articles  (4)
  • Other Sources
  • superconductors  (4)
  • Springer  (4)
  • Frontiers
  • MDPI Publishing
  • 1985-1989  (4)
  • Electrical Engineering, Measurement and Control Technology  (4)
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  • Books
  • Articles  (4)
  • Other Sources
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  • Springer  (4)
  • Frontiers
  • MDPI Publishing
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  • 1
    Electronic Resource
    Electronic Resource
    Casting high-T c superconducting BiSCCO (1989)
    Springer
    Journal of superconductivity 2 (1989), S. 253-263 
    Details
    ISSN: 1572-9605
    Keywords: casting, heat treatment ; superconductors ; BiSCCO
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Bi-Sr-Ca-Cu-O (BiSCCO) was melted and cast into molds in order to render the superconductor into fully dense and useful shapes. Special conditions for casting and subsequent heat treatments were required to ensure structural integrity and a high transition temperature,T c .The history of the castings during heat treatments was studied by thermal analysis, X-ray diffraction, and microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00617876
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structure and superconductivity of Bi-(Pb)-Ca-Sr-Cu-O ceramics processed by arc melting (1989)
    Springer
    Journal of superconductivity 2 (1989), S. 501-511 
    Details
    ISSN: 1572-9605
    Keywords: superconductors ; Bi-(Pb)-Ca-Sr-Cu-O ; X-ray diffraction ; electrical resistivity ; critical current density ; SEM ; a.c. susceptibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The Bi-(Pb)-Ca-Sr-Cu-O ceramics of typical cation composition 2 (0.4) 223, presintered at 800°C, are formed by arc melting and rapidly cooling the 2021 superconducting phase, CaO, and Cu2O. The arc-melted samples sintered in air at 840°C exhibit a solid-state structural transformation of the components and a mixture of 2122 and 2223 superconducting phases, and small amounts of Ca2CuO3, Ca2PbO4, and CuO appear. When the arc melting is used as an intermediate stage in the preparation of the high-T c superconductors in this system, a significant increase in density (from 3.7 to 5.7 g/cm3) and in critical current density (from 28 to 60 A/cm2 in zero field and at liquid-nitrogen temperature) is observed, while the critical temperature remains practically unchanged (−104 K).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00627563
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  • 3
    Electronic Resource
    Electronic Resource
    Superconducting structures for electron accelerators (1988)
    Springer
    Journal of superconductivity 1 (1988), S. 377-393 
    Details
    ISSN: 1572-9605
    Keywords: microwave ; superconductors ; accelerators ; highT c
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Large-scale application of superconducting RF cavities to electron accelerators is in progress at many laboratories around the world. These accelerators will provide high-energy beams for elementary particle physics research, medium-energy beams for nuclear physics research, and low-energy beams for free-electron lasers. Niobium is the superconductor of choice, and its performance is subject to further advances, opening new applications for the next generation of accelerators. Extensive RF characterization of high-T c superconductors (HTSC) is already under way. From the results so far, it is clear that substantial improvements in the RF properties will be needed before HTSC can compete with Nb or even with copper at room temperature. New measurements on crystalline YBaCuO suggest that these difficulties are not intrinsic, providing a strong incentive for continued efforts to improve material preparation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618595
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  • 4
    Electronic Resource
    Electronic Resource
    Characterization of doped Nd-based superconductors (1988)
    Springer
    Journal of superconductivity 1 (1988), S. 427-440 
    Details
    ISSN: 1572-9605
    Keywords: neodymium ; lanthanides ; superconductors ; oxygen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract Y-, Dy-, and Gd-doped neodymium (Nd) superconductors (RE0.1Nd0.9Ba2-Cu3Oy) exhibited sharp resistivity transitions at 92 K. DC susceptibility measurements gave a common curve with diamagnetic onsets at 93 K and transitions complete at ≈50 K. Lattice constants for an assumed orthorhombic structure were calculated from X-ray diffraction measurements. These values were used to create a simulated diffraction pattern with 2θ values and relative intensities that agreed well with observed values. Oxygen contents determined by instrumental neutron activation analysis, ranged from 14.7 to 15.1±0.1 wt%(6.59≤y in O y ≤6.73). This range of oxygen content for YBa2Cu3O y gives ≈50–60 K transitions in marked contrast to the 92 K (midpoint) values for the materials of this study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00618599
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