Abstract

Three step sintering method has been introduced in KNN-based lead free piezoceramics. The phase structure of the ceramics transform from rhombohedral phase to the coexistence of rhombohedral phase and tetragonal phase, and phase transition temperature shifts to −10 °C by three step sintering. Excellent piezoelectric properties have been obtained, d₃₃ = 405pC/N at room temperature, the d₃₃ values are above the 300pC/N from room temperature to around 200 °C.

中文翻译：

---

KNN基无铅压电陶瓷的相变和温度稳定性

摘要

在基于KNN的无铅压电陶瓷中引入了三步烧结方法。陶瓷的相结构从菱面体相转变为菱面体相和四方相共存，并且通过三步烧结使相变温度转变为-10°C。获得了优异的压电性能，室温下d ₃₃ = 405pC / N，从室温到200°C左右，d ₃₃值均高于300pC / N。