In this work, 0.96(K0.48Na0.52)1xLixNbO3e0.04Bi0.5Na0.5ZrO3 lead-free piezoceramics were prepared
using the conventional solid state reaction method in order to attain both a high TC and an enhanced
d33. The effect of Li content on their phase structure, electrical properties, and stability was systematically
investigated. These results indicate that adding Li could result in the increase of TC and the
decrease of TOeT. Here we obtain the ceramics with an orthogonaletetragonal phase boundary in the
composition of x ¼ 0.02, and then enhanced piezoelectric properties and a high Curie temperature (i.e.,
d33 w 255 pC/N, kp w 41%, and TC w 360 C) were observed, showing the realization of our objective. In
addition, a good stability of piezoelectric and ferroelectric properties has been shown in such a material
system.