期刊
ACTA MATERIALIA
卷 58, 期 13, 页码 4527-4535出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.actamat.2010.04.049
关键词
Optical properties; Oxides; Grain size; Theory; Scattering
The microstructure and optical properties of MgO-doped alumina fabricated by spark plasma sintering were investigated. MgO doping to alumina exhibited no noticeable effect on the total forward transmission, but suppressed grain growth and enhanced in-line transmission. The analytical investigation of the scattering coefficients confirmed that MgO-doped alumina has the scattering characteristics of the homogeneous matrix dispersed with spherical scattering grains, and that the existing model of light scattering in an alumina poly-crystal is valid within a limited range of the wavelength/grain size ratio. The investigation also led to experimental determination of the effective volume density of spherical scattering grains satisfying the Rayleigh-Gans theory. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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