KNN-Sb lead-free piezoelectric ceramics synthesized by hydrothermal method

摘要

K_(1-x)Na_xNb_(1-y)Sb_yO_3 lead-free piezoelectric ceramic powders were prepared by hydrothermal route. The samples were sintered under normal pressure at 1060 ℃ for 2 h. The structure of piezoelectric ceramics is perovskite and crystalline grain shows a block shape. With the different ceramics component and microstructure, piezoelectric constant d_(33) varies from 20 to 73pC/N. When x=0.54, y=0.05, the value of d_(33) reached the maximum.