Effect of BNZ Component on Structure and Property of KNN Based Lead-free Piezoelectric Ceramics
In order to promote the practical application of lead-free piezoelectric ceramics,in this pa-per,a kind of sodium potassium niobate-sodium bismuth zirconate(1-x)K048Na0.52Nb0.96Sb0.04O3-x(Bi0.5Na0.5)ZrO3 lead-free piezoelectric ceramics were prepared,and their crystallographic structure and perfor-mance were assessed.Results show that their relative dielectric constant and the resonant frequency temperature are stable(＜10‰)with the variation of temperature;the piezoelectric ceramics are typical perovskite structure,and the most compact ceramic sample is obtained with x=0.04,which endows RD=97.43％,d33=463 pC/N,kp=0.55 and Qm=37;the piezoelectric ceramics consists of tripartite-tetragonal(R-T)two-phases and the existence of nanodomain structure may be the cause for the excellent piezo-electric properties of ceramic materials.
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