Temperature-insensitive high piezoelectricity in a (Bi0.5K0.5)TiO3–PbTiO3–PbZrO3 ternary system

A d 33 value exceeding 350 pC N −1 , maintained up to 320 °C, and a large strain of 0.29% within 20% variation are achieved in a novel system of BKT–PT–PZ. The stable nanosized domains contribute to the temperature-insensitive high piezoelectricity.