(K,Na)NbO3-Based Multilayer Piezoelectric Ceramics with Nickel Inner Electrodes

概要

論文の詳細を見る
A lead-free (K,Na)NbO3-based multilayer piezoelectric ceramic with nickel inner electrodes was obtained. Its normalized electric-field-induced thickness strain ($S_{\text{max}}/E_{\text{max}}$) was 360 pm/V, where $S_{\text{max}}$ denotes the maximum strain and $E_{\text{max}}$ denotes the maximum electric field. This value of 360 pm/V is about half that for the Pb(Zr,Ti)O3-based ceramics that are widely used. However, the (K,Na)NbO3-based multilayer ceramic can achieve comparable displacement to that attainable with Pb(Zr,Ti)O3-based multilayer ceramics by stacking more ceramic layers with smaller thicknesses. Additionally, it is easier to reduce the ceramic-layer thickness by using nickel electrodes. The developed (K,Na)NbO3-based multilayer ceramic is thus considered a good candidate for lead-free piezoelectric actuators.
Japan Society of Applied Physicsの論文
2009-11-25