Composition design, electrical properties, and temperature stability in (1 − x)K(0.44)Na(0.56)Nb(0.96)Sb(0.04)O(3)-xBi(0.45)La(0.05)Na(0.5)ZrO(3) lead-free ceramics

In this work, we designed a new system of (1 − x)K(0.44)Na(0.56)Nb(0.96)Sb(0.04)O(3)-xBi(0.45)La(0.05)Na(0.5)ZrO(3) (KNNS-xBLNZ, 0 ≤ x ≤ 0.06) ceramics, and systemically investigated both their electrical performance and temperature stability. Through optimizing the composition, a relatively good comprehensive performance (e.g., d(33) ∼ 455 ± 10 pC N(−1), k(p) ∼ 0.47 ± 0.02, T(C) ∼ 266 °C, strain ∼ 0.148%, and [Image: see text]) is obtained in the ceramics with x = 0.040, which is attributed to the construction of a rhombohedral–orthorhombic–tetragonal (R–O–T) phase boundary. Moreover, a good temperature stability of remnant polarization (P(r)) as well as strain value (P(r100 °C)/P(rRT) ∼ 89.6%, P(r180 °C)/P(rRT) ∼ 73.2%, S(100 °C)/S(RT) ∼ 92.6%, S(180 °C)/S(RT) ∼ 74.1%) is gained in KNNS-0.040BLNZ ceramics with a broad temperature range from room temperature to 180 °C. Hence, we believe that KNNS-xBLNZ ceramics opens a window for the practical application of lead-free ceramics.