Sodium-potassium niobate (Na_1-xK_xNbO₃) ceramic pellets were prepared, near equimolar Na- K composition, by solid state reaction method with double sintering. Remnant polarization, coercive field, polarization current and converse piezoelectric coefficient (d*₃₃) of the prepared samples were measured. The observed properties exhibit strong composition dependence- a morphotropic phase transition type behavior, showing extremal piezoelectric properties for potential lead free transducer applications, at the composition with x = 0.500.

中文翻译：

---

x接近0.500的晶相区域Na1-xKxNbO3的压电性质。

通过固态烧结双反应烧结法，制备了接近等摩尔Na-K组成的铌酸钠钾（Na _1-x K _x NbO ₃）陶瓷颗粒。测量了所制备样品的残余极化，矫顽场，极化电流和逆压电系数（d * ₃₃）。在x = 0.500的成分下，观察到的特性表现出很强的成分依赖性-变质相变型行为，显示出潜在的无铅换能器应用的极致压电特性。