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Less temperature-dependent high dielectric and energy-storage properties of eco-friendly BiFeO3–BaTiO3-based ceramics
- Less temperature-dependent high dielectric and energy-storage properties of eco-friendly BiFeO3–BaTiO3-based ceramics
- Akram, Fazli; Kim, Junchan; Khan, Salman Ali; Zeb, Aurang; Yeo, Hong Goo; Sung, Yeon Soo; Song, Tae Kwon; Kim, Myong-Ho; Lee, Soonil
- Issue Date
- Journal of Alloys and Compounds, 818(25)
- Article Type
- Author Keywords
- BiFeO3 BaTiO3; Dielectric; Ferroelectric; Relaxor; Energy storage
- STABLE RELATIVE PERMITTIVITY; PIEZOELECTRIC PROPERTIES; FERROELECTRIC PROPERTIES; ELECTROMECHANICAL PROPERTIES; ANTIFERROELECTRIC CERAMICS; ELECTRICAL-PROPERTIES; THERMAL-STABILITY; RELAXOR BEHAVIOR; LARGE-STRAIN; DEGREES-C
- 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. © 2019 Elsevier B.V.
- Elsevier BV
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