The removal of the polytitanate secondary phase in the BCZT-A sample resulted in a small-signal d33 of 233 pC/N which is 28% higher as compared to the nominally-stoichiometric BCZT (182 pC/N; as detailed in Table ). The piezoelectric performance has also been improved for the BCZT-Q and BCZT-Q-A samples, demonstrating the beneficial influence of secondary phase removal on the domain wall movement. However, this positive effect is diminished in the latter two samples by the increased concentration of point defects resulting from quenching. It is worth mentioning that the increase of piezoelectric coefficients after secondary phase removal is expected to be even larger for compositions near the phase boundaries, e.g., the widely investigated 0.50Ba(Zr0.2Ti0.8)O3-0.50(Ba0.7Ca0.3)TiO3, since the contribution of domain walls to the electromechanical response is much larger in these compositions.