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  • SOLID-STATE PHYSICS  (2)
  • Astronomy
  • Electronics and Electrical Engineering
  • 1985-1989  (3)
  • 1
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    Rotary high power transfer apparatus (1987)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: An apparatus for reducing terminal-to-terminal circuit resistance and enhancing heat transfer in a rotary power transfer apparatus of the roll ring type comprising a connecting thimble for attaching an external power cable to a cone shaped terminal which is attached to a tab integral to an outer ring. An inner ring having a spherical recess mates with the spherical end of a tie connector. A cone shaped terminal is fitted to a second connecting thimble for attaching a second external power cable.
    Keywords: Electronics and Electrical Engineering
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Ceramic problems/challenges in high temperature oxide superconductors - Hysteretic force measurements as a new analysis tool (1989)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: A technique is presented for analyzing high-temperature oxide superconductors using hysteretic magnetic force/distance measurements. Emphasis is placed on developing low weight, highly robust superconducting materials for space applications. Bi-Ca-Sr-Cu superconductors are prepared and characterized by standard techniques. It is found that standard techniques such as XRD, SEM, and TEM are insufficient to completely characterize superconductors. The magnetic properties of the superconductors are studied with the new technique, based on measuring the force between a magnet and the superconductor as a function of their separation.
    Keywords: SOLID-STATE PHYSICS
    Type: International Symposium on Superconductivity (ISS ''88); Aug 28, 1988 - Aug 31, 1988; Nagoya; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Syntactic intergrowth problems with BCSCO and fabrication difficulties therefrom (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: EDXS performed on isolated particles of the Bi-Ca-Sr-Cu-O high-temperature ceramic superconductor has verified the presence of significant elemental exchange between the Ca and Sr, and, to a lesser extent, between Cu and Bi. Two primary preparations, identified as primarily 24.4 A and 30.6 A, respectively, are identified. The Cu:Bi ratio in the 30.6 A material is approximately 1:1 for most particles, although only a few particles of the nominally 24.4 A material have the expected 1:2 ratio. No unequivocal assignment of atomic composition to the predominantly 24.4 A or 30.6 A appears possible, if major syntactic problems are present.
    Keywords: SOLID-STATE PHYSICS
    Type: Better Ceramics Through Chemistry III; Apr 05, 1988 - Apr 08, 1988; Reno, NV; United States
    Format: text
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    NASA TECHNICAL REPORTS
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