Most high-entropy fluorite oxides (HEFOs), except for the two containing both Yb and Gd, can be sintered to high relative densities. These single-phase HEFOs exhibit lower electrical conductivities and comparable hardness (even with higher contents of softer components such as Y 2 O 3 and Yb...
the thermodynamic parameters are estimated, including the enthalpy change and the configuration entropy in Fig.3f. It can be found the enthalpy change of dislocations in fluorite oxides is almost insensitive to the number of principal elements,N. In contrast, with the increase...
et al. High-throughput screening of high-entropy fluorite-type oxides as potential candidates for photovoltaic applications. Adv. Energy Mater. 13, 2204337 (2023). Article CAS Google Scholar Schweidler, S. et al. Synthesis and characterization of high-entropy CrMoNbTaVW thin films using high...
This entropy-driven disordering is similar to the order–disorder transformation of pyrochlore Fd3m to fluorite Fm3m that occurs in A2B2O7 oxides [64]. Ordering of the cation and oxygen vacancies is lost when the temperature is increased above the disorder transformation temperature of the ...
Thermal barrier coating (TBC) materials are an important method to provide thermal protection and prolong service life for aero-engines and gas turbines. In recent years, various kinds of high-entropy (HE) rare earth oxides have emerged in the exploratio
high-entropy(La_(0.2)Nd_(0.2)Sm_(0.2)Eu_(0.2)Gd_(0.2))_(2)Ce_(2)O_(7) is designed and synthesized in this work.The as-prepared multicomponent material is formed in a simple disordered fluorite structure due to the high-entropy stabilization effect.Notably,it exhibits a much higher ...
Following a couple of our most recent studies, we propose a step forward to expand HECs to compositionally complex ceramics (CCCs) to include medium-entropy and non-equimolar compositions. Using defective fluorite and ordered pyrochlore oxides as two primary examples, we further consider the ...
The common crystal structure types, such as NaCl, CsCl, sphalerite (ZnS), fluorite (CaF2), diamond, graphite, selenium, ice, dry ice, urea, Jin Hongshi, perovskite, potassium, magnesium, copper, etc.. 11. chemical equilibrium. Equilibrium constant and conversion rate. Ionization constants of ...
S37). This illustrates the impact of high-entropy oxides on the central electronic structure. In addition, HMFOR and oxygen evolution reaction (OER) are two competing reactions due to possible water oxidation side reactions in aqueous solution. Gibbs free energies of two pathways, including the ...
These promising classes of materials combine the unique behavior of solid-solution and entropy-stabilized systems with high aspect ratios and atomically thin characteristics of 2D materials. The current experimental space of these materials includes 2D transition metal oxides, carbides/carbonitrides/nitrides...