A series of highly dense barium titanate (BaTiO 3 ) ceramics with the average grain size (GS) from 0.29 to 8.61 lm are successfully prepared by two-step sintering, and the GS effect on piezoelectric coefficient (d 33 ) is systematically discussed in this work. It is found that when GS above 1 lm, d 33 can be enhanced with decreasing GS, reaching a maximum value of 519 pC/N around 1 lm due to the high activity of domain wall mobility. Subsequently, d 33 rapidly drops with a further decrease in GS owing to the reduced domain density. The results suggest that it is possible to prepare high-performance BaTiO 3 ceramics by controlling the GS and domain configuration properly, which brings great revitalization to the BaTiO 3based piezoceramics.
Dielectric ceramic capacitors are fundamental energy storage components in advanced electronics and electric power systems owing to their high power density and ultrafast charge and discharge rate. However, simultaneously achieving...
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