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Less temperature-dependent high dielectric and energy-storage properties of eco-friendly BiFeO3–BaTiO3-based ceramics
Ist Teil von
Journal of alloys and compounds, 2020-03, Vol.818, p.152878, Article 152878
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2020
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
The effects of eco-friendly (BiNa0.84K0.16)0.48Sr0.04TiO3 (BNKS)-content in 0.65Bi1.05FeO3–0.35BaTiO3 (BFBT) dielectrics were investigated by following simple solid state fabrication route. By the introduction of BNKS in BFBT matrix the average grain size was significantly reduced, with relatively high dense microstructure (relative density > 94%). The BNKS-modified BFBT dielectrics demonstrated thermally-stable εr (670–1005, from 30 °C to 500 °C), high Tmax (424 °C–465 °C), colossal εr-max (58880–69226), and εr-mid (2891–5652 ± 15%) across the broad range of temperature from 244 °C to 500 °C. At the optimum composition (x = 0.10) the temperature-dependent (30 °C–150 °C) substantially high energy-storage density (Wstore ∼ 0.81 J/cm3) and efficiency (η > 60%) in bulk ceramics were observed. The thermally-stable dielectric and energy storage properties suggest that present investigated dielectrics can be promising candidates for high temperature dielectric applications and power electronics.
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•Eco-friendly (BiNa0.84K0.16)0.48Sr0.04TiO3 (BNKS)-content BFBT dielectric ceramics were investigated.•Thermally-stable dielectric properties (εr-mid ≈ 2891–5652) were obtained in the wide temperature range (244 °C–500 °C).•Temperature-dependent high energy storage properties (Wstore ∼ 0.81 J/cm3, η ˃ 60%) over wide temperature range in ceramics.•Insight to study thermally-stable dielectric and energy storage properties of BFBT-based ceramics.