Abstract
Piezoceramics with composition (1?z) [Bi0.5(Na0.84K0.16)0.5TiO3]0.96?0.04SrTiO3?zLiTaO3 (z = 0.00?0.030) were formulated by ordinary firing process following by rapid quenching treatment. Effect of LiTaO3 on the structural, electrical and energy-storage properties were analyzed. For the composition with molar ratio 0.025, room temperature large-field piezoelectric coefficient (Smax/Emax = d33*) of 885 pm/V at 3.6 kV/mm was recorded. Furthermore, for compositions z = 0.025 and 0.030, broad temperature stable dielectric constants and low losses from -135 to 350 ?C with a small variation of ? 15% was observed. Additionally, the energy density for z = 0.025 was -0.60 J/cm3 in the broader temperature range of 75?125 ?C, along with the energy-storage efficiency of greater than 70%. These observations suggest that the studied piezo-material compositions are promising for the ceramic actuators and capacitor applications.