Properties of BNBT Modified KNN-based Lead-free Piezoceramics
Abstract：(1-x)(Na0.52K0.48)NbO3-x(Bi0.5Na0.5)0.94Ba0.06TiO3(KNN-xBNBT) lead-free piezoceramics were prepared by conventional solid-state sintering method.The samples were characterized by X-ray techniques and scanning electron microscopy.Piezoelectric and dielectric data were presented.All samples possess orthorhombic perovskite phases,and not any secondary phase can be certified.The average grain size decreases firstly and then increases with increasing BNBT content.Dielectric and piezoelectric properties of the ceramics are influenced obviously by BNBT addition.Appropriate amount of BNBT results in an improvement in electrical properties of the KNN ceramics.Enhanced piezoelectric and electromechanical properties are obtained with x=0.005: d33=123pC/N,kp=44%,tanδ=2.2%,showing that they could be promising candidates as lead-free piezoelectric materials.
Keywords：lead-free piezoceramicsKNNBNBTpiezoelectric properties
Publication Date：2012-01-01
Online Publishing Date：2026-08-28(First online date of this platform, not the publication date of the document)
Pages：5( 50-53,107 )