A five-component entropy-stabilized fluorite oxide

By Kepi Chen, Xin-qi Pei, Lei Tang, Hao Cheng, Zemin Li, Cuiwei Li, Xiaowen Zhang, L. An. Journal of the European Ceramic Society, 2018

336 citations recorded by the source corpus.

Abstract In this paper, we report a new entropy-stabilized fluorite oxide, formed by solid-state reacting the equimolar mixture of CeO2, ZrO2, HfO2, TiO2 and SnO2 at 1500 °C. We demonstrated that the oxide is truly entropy-stabilized by showing that the oxide was transferred to a multiphase state when annealed at lower temperatures, and the transition between the low-temperature multiphase and high-temperature single-phase states is reversible. Room-temperature thermal conductivity of the fluorite oxide was measured to be 1.28 Wm−1 K−1. The value is only half of that for 7 wt% yttria-stabilized zirconia, suggesting the material could be useful for thermal-insulation applications.

Subfields: Electronic, Optical and Magnetic Materials, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/fc9fed56c7b53d7c6cbaccf3b8b07754111e65f6

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Citations in the corpus

• From high-entropy ceramics to compositionally-complex ceramics: A case study of fluorite oxides (2019, background): “2)O2 (albeit some compositional inhomogeneity indicated by EDS mapping, particularly for Ce) with low thermal conductivity [25].”