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- W2366241036 abstract "The synthesis of Gd3++Ce4+codoped La2Zr2O7(La2-xGdxZr2-xCexO7,x=0.0,0.1,0.2;LGZCO)ceramics derived from citric acid sol-gel method using La(NO3)3·6H2O,Gd(NO3)3·6H2O,Ce(NO3)4·6H2O and Zr(NO3)4·5H2O as precursor have been investigated.The precursor,dried,and further sintered LGZCO samples were characterized by X-ray diffraction,scanning electron microscopy(SEM),transmission electron microscope(TEM)and differential scanning calorimetry-thermogravimetry(DSC-TG).The thermal expansion coefficients(CTE)and thermal diffusivity of these oxide materials were also evaluated by the high-temperature dilatometer and laser flash method.Those results demonstrate that all the La2-xGdxZr2-xCexO7 compositions are comprised of the pure pyrochlore La2Zr2O7 phase.Gd3++Ce4+co-doped lanthanum zirconate ceramics demonstrates low thermal conductivity reduction contributed by the substaintial additional point-defect scattering with the decreasing phonon mean free path,jontly facilitate higher CTE.Thermal conductivity of the co-doped La2-xGdxZr2-xCexO7 composition was found to be lower than that of the 8mol% yttria-stabilized zirconia(8YSZ)and showed a minimum thermal conductivity value at the composition La1.8Gd0.2Zr1.8Ce0.2O7(κ=0.99W/(m·K),T=1273K).Such excellent thermo-physical properties make the La2-xGdxZr2-xCexO7 ceramics a promising candidate for the next generation advanced thermal barrier coatings." @default.
- W2366241036 created "2016-06-24" @default.
- W2366241036 creator A5072766186 @default.
- W2366241036 date "2014-01-01" @default.
- W2366241036 modified "2023-09-25" @default.
- W2366241036 title "Preparation and Thermo-physical Properties of Gd~(3+)+Ce~(4+)Co-doped Pyrochlore-type La_2B_2O_7 Ceramics Derived from Citric Acid Sol-Gel Technique" @default.
- W2366241036 hasPublicationYear "2014" @default.
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