Abstract
To achieve the miniaturization and integration of advanced pulsed power capacitors, it is highly desirable to develop lead-free ceramic materials with high recoverable energy density (Wrec) and high energy storage efficiency (η). Whereas, Wrec (<2 J/cm3) and η (<80%) have be seriously restricted because of low electric breakdown strength (BDS < 200 kV/cm) or small maximum polarization (Pmax). Composition control was used to enhance the Pmax and further obtain excellent energy storage properties in our study. (1âx)SrTiO3-x(0.93 Bi0.5Na0.5TiO3-0.07Ba0.94La0.04Zr0.02Ti0.98O3) ((1âx)ST-x(BNT-BLZT)) ternary solid solution ceramics with x = 0.0â0.5 were fabricated using the tape-casting process and sintered by solid-state sintering method. All the samples show slim polarization-electric field (PâE) loops. The ceramic of 0.8ST-0.2(BNT-BLZT) possesses excellent energy storage properties with a Wrec of 2.83 J/cm3 and a η of 85% simultaneously. The significantly enhanced Wrec (2.83 J/cm3) is almost 2 times higher t...
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