Two types of oxygenated collectors were tested against the same emitter, to evaluate their ability to provide stable, enhanced thermionic performance. These two types were: sublimed Mo oxide layers, and a Nb-O single crystal alloy. Initially, the Mo oxide layers provided excellent thermionic performance, but degradation occurred, latter associated with emitter material transport and condensation on the collectors. By contrast, when used in conjunction with an internal getter, the Nb-O alloy resulted in somewhat lower, but stable performance, after an activation process. This activation process was associated with changes in the surface chemistry.


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    Titel :

    Evaluation of Two Types of Oxygen-Dispensing Collectors for Thermionics


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    34th Intersociety Energy Conversion Engineering Conference ; 1999



    Erscheinungsdatum :

    1999-08-02




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Evaluation of Oxygen-Dispensing Collectors for Thermionics

    Desplat, J.-L. / University of New Mexico; School of Engineering; Institute for Space and Nuclear Power Studies | British Library Conference Proceedings | 1999


    Plasma Thermionics

    Snyder, Nathan W. | AIAA | 1961


    The Advanced Thermionics Initiative Program

    LAMP, TOM / MAHEFKEY, TOM | AIAA | 1991


    Review of the Physics of Thermionics

    Snyder, Nathan W. | AIAA | 1961


    Status of Thermoelectrics and Thermionics

    Perry, L W. | SAE Technical Papers | 1964