Ceramic Nanomaterials and Nanotechnology III, Volume 159

This quantity includes papers at the synthesis and processing of inorgainc nanomaterials and nanocomposites; structure-property correlations on the nanoscale; realizing of basic phenomena in nanoscale structures and procedures; functions of nanostructured fabrics; and commercial improvement of nanomaterials.Content:

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0 A. Sandell, M. P. Andersson, M. -J. Johansson, P. G. Karlsson; Y. Alfredsson, J. Schnadt, and H. Siegbahn, P. Uvdal, "Metalorganic Chemical Vapor Deposition of Anatase Titanium Dioxide on Si: Modifying the Interface by Pre-Oxidation," Surface Science, 530 [1-2] 63-70 (2003). 11 A. Matsuda, Y. Kotani, T. Kogure, M. Tatsumisago, and T. Minami, "Transparent Anatase Nanocomposite Films by the Sol-Gel Process at Low Temperatures,"/ Am. Ceram. Soc, 83 [1] 229-231 (2000). 12 A. Matsuda, T Matoda, T.

3). Therefore, at the present SPS conditions, significant particle coarsening and grain growth occurred within the very narrow temperature range (between 725 °C and 800 °C) and very short durations, yet without full densification. This Ceramic Nanomaterials and Nanotechnology III • 25 prompted us to adopt a two-step SPS process during which higher applied pressure (150 MPa) and additional duration at lower temperature were applied. lb) was still high, similar to that at the final higher SPS temperature.

700 800 * 900 Wavelength [nm] Wavelength [nm] Fig. 10. In-line transmission spectra of nc-MgO densified by (a) one-step and (b) two-step SPS at different temperatures, and MgO single crystal as a reference specimen. The decreasing transmission at low wavelengths in the polycrystalline specimens indicates that light is scattered from pores, equal in size to the wavelength. Under certain boundary conditions, the scattering coefficient due to uniform spherical pores with diameter dp, that comprise a low volumefractionof the transmitting medium, may be calculated.

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