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  • Enhancing the dielectric relaxor behavior and energy storage properties of ▫$0.6Ba(Zr_{0.2}Ti_{0.8)}O_3-0.4(Ba_{0.7}Ca_{0.3})TiO_3$▫ ceramics through the incorporation of paraelectric ▫$SrTiO_3$▫
    Jayakrishnan, Ampattu Ravikumar ...
    Recently, relaxor ferroelectric materials have been attracting considerable attention as energy storage capacitors due to their potential applications in pulsed power systems. In this work, lead-free ... (1−x)[0.6Ba(Zr0.2Ti0.8)O3–0.4(Ba0.7Ca0.3)TiO3]–xSrTiO3 [(1−x)BZCT–xSTO] relaxor ceramics have been synthesized and their relaxor behavior is modulated via STO doping content. The incorporation of STO weakens the ferroelectric long-range order in BZCT, which favors the relaxor behavior, as experimentally proved by temperature dependent dielectric spectroscopy and polarization–electric field studies. The compositional dependence of energy storage properties in (1−x)BZCT–xSTO ceramics gave the optimum value at x = 0.15. Further, 0.85BZCT–0.15STO ceramics show the highest energy storage performance with a recoverable energy density of 0.987 J/cm3, efficiency of 84%, and high power density of 1.93 × 105 W/cm3 at an electric field of 108 kV/cm. Our ceramics show superior performance compared to previously reported values in BZCT based lead-free ceramics. The results reported here demonstrate that (1−x) BZCT–xSTO ceramics are potential candidates for energy storage capacitor applications.
    Source: Journal of materials science. Materials in electronics [Elektronski vir]. - ISSN 1573-482X (Vol. 30, 2019, str. 19374–19382)
    Type of material - e-article ; adult, serious
    Publish date - 2019
    Language - english
    COBISS.SI-ID - 237948419

    Link(s):

    https://link.springer.com/article/10.1007/s10854-019-02299-5
    DOI

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