  Lead-free Ba0.85Ca0.15Zr0.10Ti0.90O3 (BCZT) ceramics with different
BaO-Na2O-Nb2O5-WO3-P2O5 (BNNWP) glass content, forming (1-x)BCZT-xBNNWP
lead-free ceramics (abbreviated as BCZTx; x=0, 2, 4, 6, and 8wt%) were
synthesized using the conventional solid-state processing route. The XRD
investigation shows the coexistence of tetragonal and orthorhombic phases in
BCZT pure. Likewise, only the tetragonal phase was detected in BCZTx (x = 2-8
wt%) ceramics. The SEM findings indicate that the average grain size decreases
as the amount of BNNWP glass additives increases. In addition, BCZT ceramics
Amodified with glass additions showed narrower hysteresis loops and a large
electric field. The BCZT4 showed the highest recovered energy density of 0.52
J/cm3 at 135kV/cm with an energy storage efficiency of 62.4%, which is
increased by 6.6 compared to BCZT0 (0.075 J/cm3). The energy density was also
calculated using the Landau-Ginzburg-Devonshire (LGD) theory
