The piezoelectric properties of SrBi4Ti4O15-Na0.5Bi4.5Ti4O15 solid solution

To improve the piezoelectric properties of SrBi4Ti4O15 ceramics, the (Na0.5Bi0.5) was selected as the substitute for Sr site and the Sr1-x(Na0.5Bi0.5)xBi4Ti4O15 (x = 0.00, 0.10, 0.20, 0.30, 0.40) ceramics were synthesized by the conventional solid-state reaction method. Considering the similar parameter of Na, Bi and the Sr element, the single phase showed in the x-ray Diffraction patterns should be SBT-NBT solid solution. The excellent piezoelectric properties were obtained for Sr1-x(Na0.5Bi0.5)xBi4Ti4O15 ceramics (x = 0.10) sintered at 1000°C for 3 h: e33T/e0= 196, d33 = 20 pC/N, tanδ = 0.28%, TC = 575°C. Under the premise of not severely deteriorating the TC, compared with the Na0.5Bi4.5Ti4O15 and SrBi4Ti4O15, the Sr0.9(Na0.5Bi0.5)0.1Bi4Ti4O15 materials are promising candidates for high-temperature applications.