期刊
MATERIALS
卷 13, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/ma13030558
关键词
entropy-stabilized oxides; hydrothermal treatment; fluorite structure
类别
资金
- KRF-the Korean Research Fellowship Program through the National Research Foundation of Korea - Ministry of Science and ICT, Republic of Korea [2016H1D3A1908428]
Entropy-Stabilized Oxides (ESO) is a modern class of multicomponent advanced ceramic materials with attractive functional properties. Through a five-component oxide formulation, the configurational entropy is used to drive the phase stabilization over a reversible solid-state transformation from a multiphase to a single-phase state. In this paper, a new transition metal/rare earth entropy-stabilized oxide, with composition Ce0.2Zr0.2Y0.2Gd0.2La0.2O2-delta, was found after several investigations on alternative candidate systems. X-Ray Diffraction (XRD) analyses of calcined powders pointed out different behavior as a function of the composition and a single-phase fluorite structure was obtained after a specific thermal treatment at 1500 degrees C. Powders presented the absence of agglomeration, so that the sintered specimen exhibited sufficient densification with a small porosity, uniformly distributed in the sample.
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