Enhanced Breakdown Strength by Ion Substitution in Lead-free BaTi0.895Sn0.105O3–based Ceramics

A lead-free (1-x)BaTi0.895Sn0.105O3-xBi(Mg0.5Zr0.5)O3(1-x)BTS-xBMZ (x=0-0.2) bulk ceramics were triumphantly synthesized using a traditional solid-state reaction technology. The X-ray diffraction (XRD) result reveals a single perovskite structure for lead-free ceramic samples of all sintered. The sintering step shows that the BMZ addition could lower the sintering temperature of the BTS-based ceramics. The sintering step shows that the sintering temperature of BTS-based lead-free ceramics could be decreased by constantly adding BMZ content. The polarization-electric field (P-E) hysteresis curves are observed in the (1-x)BTS-xBMZ samples with different x value. The maxima electric breakdown strength (Eb) of (1-x)BTS-xBMZ ceramics is 250kV/cm at x=0.2, with an optimum energy density of 1.52J/cm$^{3}$ and a relatively high efficiency of 89.5% are achieved. In the present work, energy storage properties (energy storage density (W$_{rec}$) and the energy storage efficiency ($\eta$)) have clearly improved. These results indicated that the (1-x)BTS-xBMZ bulk ceramic may become a hopeful lead-free materials in the field of high-energy storage dielectric capacitor.