(1 − x)(Ba0.85Ca0.15)(Zr0.1Ti0.9)O3–xBiAlO3((1 − x)BCZT–xBAO) piezoelectric ceramics were synthesized by a solid-state reaction method. Effects of BAO content on the sintering temperature, phase structure, microstructure and electrical properties of BCZT ceramics were investigated. X-ray diffraction revealed a phase transition from orthorhombic to tetragonal phases at x = 0.3–1.0 mol%. The grain size gradually becomes smaller with increasing the BAO content. It was observed that the introduction of BAO content not only decreased the sintering temperature from 1450 to 1300 °C but also enhanced the electrical properties and temperature stability. The favorable electrical properties (d 33 = 568 pC/N, k p = 0.54, P r = 8.17 µC/cm2, E c = 3.45 kV/cm, e m = 13,298, e r = 3375, tanδ = 0.021, T c = 72 °C and S = 0.06 %) were demonstrated for the BCZT based ceramics sintered at 1300 °C with x = 0.8 mol%. These results indicated that the ceramics sintered at low temperatures was promising for piezoelectric applications.