Fig. 6. (a) X-ray diffractograms of four-component derivatives of (MgCoNiCuZn)O as a substrate; (b) DFT analysis of four diffractive phase compositions by mixing enthalpy [94]. (c) Side diagram of thin film battery with 50 nm Li(CrMnFeCoNiCu)O2 (001) as positive electrode, and cyclic voltammogram [95]. (d) CTE and Fracture toughness of HEO-La, Nd, Gd, Dy [97]. (e) the XRD patterns of the samples. It can be seen that RE2Zr2O7 and RE2Hf2O7 failed to form single-phase high-entropy pyrochlore phase; RE2Ce2O7 and RE2Pr2O7 HEOs, exhibited a single phase structure with a fluorite-type structure [99]. (f) Calculation of thermal conductivity of (EuErLuYYb)2O3, (SmErLuYYb)2O3 and Y2O3 [105]. (g) Thermal conductivity κ curve of HEO4, 5, 7-10 and Eu2O3 [104].
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