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- W4384927235 abstract "Dielectric capacitors play an increasingly important role in power systems because of their fast charging and discharging speed. Applications are usually limited due to the low Wrec. We design materials with high values of ΔP(Pmax-Pr) and recoverable energy storage density(Wrec) from the high entropy perspective. Two single phases with a large Curie temperature Tc difference have been selected, which leads to the enlarged entropy. The ceramics (Bi0.85Nd0.1Sm0.05)1-xBax)(Fe1-xTix)O3(BNSBFTx) are prepared by the solid-state reaction. As x increases, the corresponding configuration entropy(Sconfig) goes from 1.4 R to 1.52 R. The increased entropy destroys the long-range order, accompanied by the reduced remanent polarization(Pr) and the improved Wrec. The Wrec of BNSBFT0.5 ceramics reaches 4.9 J/cm3 at a low field of 250 kV/cm. Both temperature change(~ 0.5% from 30 oC to 140 oC) and frequency variation(~ 4.8% from 1 Hz~50 Hz) in Wrec show excellent stability." @default.
- W4384927235 created "2023-07-22" @default.
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- W4384927235 date "2023-12-01" @default.
- W4384927235 modified "2023-10-17" @default.
- W4384927235 title "High energy storage density under low electric fields in BiFeO3-based ceramics with max configurational entropy" @default.
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- W4384927235 doi "https://doi.org/10.1016/j.jeurceramsoc.2023.07.047" @default.
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