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- W4289278009 abstract "Recently, lead-free energy storage ceramics have attracted considerable research interests due to their fast charge/discharge rate, environmental friendliness and high-power density. However, there also exist the problems of low energy density (W) and poor charge-discharge efficiency (η) for most of lead-free ceramics. Herein, novel ceramics of (1-x)(Bi0.5Na0.5)0.94Ba0.06]TiO3-xLa[Zn2/3(Nb0.5Ta0.5)1/3]O3 (BNBT-xLZNT) have been developed and synthesised by an ordinary sintering technique, and their microstructures and electrical properties have been researched systematically. The tetragonal (T) and rhombohedral (R) phases coexist in the BNBT-xLZNT ceramics. After the doping of La[Zn2/3(Nb0.5Ta0.5)1/3]O3 (LZNT), the ferroelectric long-range order is effectively destroyed and the remanent polarization (Pr) of the materials is significantly reduced, leading to the shift of the shoulder dielectric peak at Ts towards room temperature and the broadening of the maximum dielectric peak at Tm. Consequently, the ceramic with x = 0.04 (BNBT-4LZNT) possesses the highest maximum polarization (Pmax) of 31.82 μC/cm2 and the lowest Pr of 2.57 μC/cm2. According to above advantages, the optimum effective energy storage density (Wrec) of 1.66 J/cm3 and η of 73.97% are gained under a relatively low dielectric breakdown strength (DBS) of 139 kV/cm. In addition, the BNBT-4LZNT ceramic exhibits excellent temperature (25–250 °C), frequency (1–100 Hz) and fatigue resistant stabilities (10-104 cycles). Our study indicates that the energy storage properties of BNT-based ceramics can be significantly enhanced via multiphase and dielectric peak broadening engineering." @default.
- W4289278009 created "2022-08-01" @default.
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- W4289278009 date "2022-10-01" @default.
- W4289278009 modified "2023-10-17" @default.
- W4289278009 title "Enhanced energy storage properties and dielectric stabilities in BNT-based ceramics via multiphase and dielectric peak broadening engineering" @default.
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- W4289278009 doi "https://doi.org/10.1016/j.matchemphys.2022.126542" @default.
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