Comparison of elastic moduli for ceria from different sources. Published data from Wygant [27] (calculated assuming Poisson's ratio of 0.3), Sato et al. [28,29], Lipińska-Chwałek et al. [30], and Wang et al. [31] are shown superimposed on the data generated in the present study. The values from the literature are adjusted to an equivalent porosity of 0.20 using Eq. (11) with b = 3.0. (A base porosity value of zero was used instead of the specimen porosity of 0.06 for Wang et al. [31] because they used nanoindentation and the indents fell entirely within single grains.) The original specimen porosities are shown in the legend. The curve fit to the data for gelcast ceria (Eq. (4)) is also shown.