Na0.25Sr0.5Bi0.25TiO3 relaxor ferroelectric ceramic with greatly enhanced electric storage property by a B-site ion doping
Source abstract
Abstract
Abstract A B-site acceptor doping strategy has been employed to fabricate Na0.25Sr0.5Bi0.25TiO3 (NSBT-xM) relaxor dielectric ceramics for the purpose of obtaining predominant energy storage properties for pulsed power capacitor applications. MgO was selected as the acceptor additive, and the corresponding ceramics were designed and prepared by traditional preparation method of electronic bulk ceramic. The influence of MgO on the micro structure, surface micromorphology, the variation of dielectric properties and storage of electrical energy, and also the mechanism of the NSBT-xM samples were deeply and systematically studied. The substitution of Ti4+ by Mg2+ at B-site induces point defects companied with defect diploe PD, which influences the electrical properties dramatically. Appropriate amount of MgO can significantly increase the electrical breakdown strength and reduce Pr, which is conducive to the improvement of energy storage performance. Particularly, the NSBT-0.25 M sample exhibits both high Wrec (2.06 J/cm3) and excellent efficiency (84%) spontaneously. It also exhibits fantastic frequency stability, fatigue endurance, and excellent charge and discharge performance.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Dielectric materials and actuators · Acoustic Wave Resonator Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (87)
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