A Five-Component Entropy-Stabilized Fluorite Oxide

Keywords

Entropy-stabilization; Fluorite oxide; Phase transition; Thermal conductivity

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.

Publication Date

9-1-2018

Publication Title

Journal of the European Ceramic Society

Volume

38

Issue

11

Number of Pages

4161-4164

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jeurceramsoc.2018.04.063

Socpus ID

85046627601 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85046627601

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