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RSS FeedsMaterials, Vol. 13, Pages 558: Entropy-Stabilized Oxides owning Fluorite Structure obtained by Hydrothermal Treatment (Materials)

 
 

24 january 2020 15:00:20

 
Materials, Vol. 13, Pages 558: Entropy-Stabilized Oxides owning Fluorite Structure obtained by Hydrothermal Treatment (Materials)
 


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−, 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.


 
255 viewsCategory: Chemistry, Physics
 
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