Transition in temperature scaling behaviors and super temperature stable polarization in BiScO 3 –PbZrO 3 –PbTiO 3 system

Temperature scaling of dynamic ferroelectric hysteresis for the morphotropic phase boundary (MPB) compositions in x BiScO 3 –(1‐ x ‐ y )PbZrO 3 – y PbTiO 3 ( x BS–(1‐ x ‐ y )PZ– y PT, 0.018 ≤  x  ≤ 0.264) ternary system was systematically investigated. The power‐law relation was obtained for remanent polarization P r and temperature T , that is, P r  ∝  T β . It is interesting to find that the power‐law exponent β could be modulated by BiScO 3 content x . With the increase of x from 0.018 to 0.264, β varies from −1.09398 to 2.44147. Transition of β from negative to positive produces in the vicinity of 0.054BS–0.476PZ–0.470PT ceramic. At this composition, the magnitude of β is very close to zero with value of only −0.01567, implying an almost temperature‐independent polarization characteristic of the ceramic. Comparing with the conventional PZT‐based piezoelectric ceramics that usually with negative exponent β , when x  > 0.054, the x BS–(1‐ x ‐ y )PZ– y PT ceramics show positive β value, so that the ferroelectric polarization is enhanced with increasing temperature. Such a positive temperature dependence of ferro‐/piezoelectric property makes the ternary system a promising candidate for high‐temperature applications.