The greater demand for high-quality large-diameter crystals has led to the robust idea of a free-flying solar-powered furnace satellite, whereby the buoyancy-driven convection effects are almost nonexistent, and diffusion-controlled crystal growth with minimal radial segregation is promoted. In the proposed solar furnace, a paraboloid of revolution imaging concentrator is used to focus the sun's radiation onto an ampoule which holds the solid charge to be processed. The charge will start melting in the vicinity of the coal point, after which it is translated in order for the melt to resolidify as a single crystal. A ray-trace method has been developed to determine the incident concentrated solar heat flux on the ampoule surface for a perfectly-aligned configuration with an incoming uncoluminated beam. A transient 2-dimensional conduction problem with phase change is formulated, which is solved using the commercial code FIDAP. By ignoring the participation of the ampoule in the heat transfer process, preliminary results highlighting the feasibility of growing GaAs, Ge and Si crystals with diameters of the order of 20 cm using the solar furnace satellite concept are presented. The transient temperature fields within various charge materials during the heat-up process are quantified. The resulting melting pattern is observed to be more uniform along the charge when compared to the idealized limiting case of columnated beams.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Temperature fields within large-diameter crystals grown on a solar furnace satellite


    Additional title:

    Temperaturfelder in großen in einem Satelliten mit Sonnenofen gewachsenen Kristallen


    Contributors:
    Lan, X.K. (author) / Khodadadi, J.M. (author) / Wang, L. (author) / Jones, P.D. (author) / Overfelt, R.A. (author)


    Publication date :

    1994


    Size :

    7 Seiten, 6 Bilder, 2 Tabellen, 7 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Solar furnace satellite for large diameter crystal growth in space

    Overfelt, Tony / Wells, Mark / Blake, John | NTRS | 1993


    Solar furnace satellite for large diameter crystal growth in space

    OVERFELT, TONY / WELLS, MARK / BLAKE, JOHN | AIAA | 1993


    Fixture for charging large-diameter deposition furnace

    WANG WEILIANG / LIU DONGHONG / ZHOU JUNCHAO et al. | European Patent Office | 2024

    Free access

    Large-diameter quartz furnace tube hoisting device and mounting method

    YAN YUNLU / YOU HUA / ZHU RUIHUAN et al. | European Patent Office | 2024

    Free access