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- W3201213878 abstract "• A series of novel high entropy fluorite oxides (Zr,Hf,Pr,Y,La)O were synthesized and the reaction sequence of five binary oxides was studied. • Configurational entropy could affect the single-phase transition temperature and sinterability of high entropy oxides. • Pr element could substitute Ce in composition complex fluorite oxides (CCFOs) and improve the electrical conductivities of ceramic to some degree. A series of compositionally complex fluorite oxides (CCFOs) were prepared by ball milling the mixture of ZrO 2 , HfO 2 , Y 2 O 3 , La 2 O 3 , and Pr 6 O 11 followed by conventional solid-state sintering. Both XRD and TG-DSC results demonstrated that single-phase (Zr 0.2 Hf 0.2 Pr 0.2 Y 0.2 La 0.2 )O 2-δ was formed at 1400 °C. Elements in bulk ceramic were uniformly distributed without evident accumulation according to SEM-EDS pictures. TEM results revealed that polycrystalline ceramic powder was assignable to cubic Fm-3m fluorite structure. The electrical conductivity ( σ ) was measured via EIS technology and activation energy ( E a ) of CCFOs was calculated in Arrhenius plots. In the temperature range of 300-750 °C, CCFOs preserved the same conduction mechanism and (Zr 0.1667 Hf 0.1667 Pr 0.1667 Y 0.25 La 0.25 )O 2-δ possessed higher σ and lower E a than other high entropy fluorite oxides which is related to the incorporation of Pr element or the connection of cation-V o complex." @default.
- W3201213878 created "2021-09-27" @default.
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- W3201213878 date "2022-04-01" @default.
- W3201213878 modified "2023-10-01" @default.
- W3201213878 title "Preparation and electrical conductivity of (Zr, Hf, Pr, Y, La) O high entropy fluorite oxides" @default.
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- W3201213878 doi "https://doi.org/10.1016/j.jmst.2021.07.028" @default.
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