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  1. No Access

    Article

    Evolution of ZnO nanostructures on silicon substrate by vapor-solid mechanism: Structural and optical properties

    ZnO nanostructures with different morphologies and sizes were synthesized on silicon substrate simply by the thermal evaporation of high-purity metallic zinc powder in the presence of oxygen without the use of...

    A. Umar, Y. H. Im, Y. B. Hahn in Journal of Electronic Materials (2006)

  2. No Access

    Article

    Wall-to-bed heat transfer in a circulating fluidized bed for the reduction of iron ore particles

    A model is presented that describes the wall-to-bed heat transfer in a circulating fluidized bed (CFB) used for the prereduction of iron ore in the smelting-reduction iron-making process. The model incorporate...

    Y. B. Hahn, Y. H. Im in Metallurgical and Materials Transactions B (1997)