High energy storage density and efficiency with excellent temperature and frequency stabilities under low operating fiel
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High energy storage density and efficiency with excellent temperature and frequency stabilities under low operating field achieved in Ag0.91Sm0.03NbO3‑modified Na0.5Bi0.5TiO3‑BaTiO3 ceramics Tianyu Li1 · Pengfei Chen1 · Renjun Si1 · Feng Li2 · Youmin Guo1,3 · Chunchang Wang1,3,4 Received: 1 May 2020 / Accepted: 12 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Ag0.91Sm0.03NbO3-modified Na0.5Bi0.5TiO3–BaTiO3 ceramics (0.94−x)Na0.5Bi0.5TiO3–0.06BaTiO3–x(Ag0.91Sm0.03)NbO3 (x = 0, 0.03, 0.06, and 0.09) were prepared by solid-state reaction method. The structural, dielectric, and energy storage properties of the ceramics were systematically studied. Our results indicate that all ceramics exhibit pure perovskite structure with dense microstructure. All the elements in the ceramic are homogeneously distributed. The sample with the doping level x = 0.09, possesses good temperature stability of the dielectric constant (Δε′/ε′150 °C ≤ ± 15%) and low dielectric loss (
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