Entropy-Stabilized Oxides owning Fluorite Structure obtained by Hydrothermal Treatment
oleh: Luca Spiridigliozzi, Claudio Ferone, Raffaele Cioffi, Grazia Accardo, Domenico Frattini, Gianfranco Dell’Agli
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2020-01-01 |
Deskripsi
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 Ce<sub>0.2</sub>Zr<sub>0.2</sub>Y<sub>0.2</sub>Gd<sub>0.2</sub>La<sub>0.2</sub>O<sub>2−δ</sub>, 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 °C. Powders presented the absence of agglomeration, so that the sintered specimen exhibited sufficient densification with a small porosity, uniformly distributed in the sample.