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- W2135808546 abstract "The thermal conductivity of a series of complex aluminates, RE2SrAl2O7, with different rare-earth (RE) ions, has been measured up to 1000°C. There is a strong dependence on the atomic number of the RE ion, ranging from an approximately 1/T dependence for the lanthanum strontium aluminate to an almost temperature-independent behavior of the dysprosium strontium aluminate. The latter conductivity is comparable with that of yttria-stabilized zirconia, the current material of choice for thermal barrier coatings. The temperature dependence of the thermal conductivities of all the aluminates studied can be fit to a standard phonon–phonon scattering model, modified to account for a minimum phonon mean free path, in which the difference in behavior is attributed to increased phonon–phonon scattering with the atomic mass of the RE ion. Although a satisfactory parametric fit is obtained, the model does not take into account either the detailed layer structure of the aluminates, consisting of alternating rock-salt and perovskite layers in a natural superlattice structure, or the site preferences of the RE ion. This suggests that further model development is warranted." @default.
- W2135808546 created "2016-06-24" @default.
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- W2135808546 date "2010-03-01" @default.
- W2135808546 modified "2023-10-14" @default.
- W2135808546 title "Thermal Conductivity of the Rare-Earth Strontium Aluminates" @default.
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- W2135808546 doi "https://doi.org/10.1111/j.1551-2916.2009.03594.x" @default.
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