Effects of CuO and ZnO Additives on Sintering Temperature and Piezoelectric Properties of 0.41Pb(Ni1/3Nb2/3)O3–0.36PbTiO3–0.23PbZrO3 Ceramics

概要

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ZnO-added 0.41PNN–0.36PT–0.23PZ ceramics cannot be sintered below 950°C. However, when CuO is added, the liquid phase forms and specimens can be sintered even at 850°C. The dielectric constant (${\varepsilon^{\text{T}}}_{3}/\varepsilon_{\text{o}}$), piezoelectric constant ($d_{33}$) and electromechanical coupling factor ($k_{\text{p}}$) increase with the addition of CuO and this is due to the enhancement of the density of the specimens. When CuO is added to 0.41PNN–0.36PT–0.23PZ ceramics, improvements of density, ${\varepsilon^{\text{T}}}_{3}/\varepsilon_{\text{o}}$, $d_{33}$ and $k_{\text{p}}$ are also observed. However, the $d_{33}$ and $k_{\text{p}}$ values of the CuO-added 0.41PNN–0.36PT–0.23PZ ceramics are less than those of the CuO- and ZnO-added specimens. Therefore, ZnO is effective in improving the piezoelectric properties of 0.41PNN–0.36PT–0.23PZ ceramics. Good dielectric and piezoelectric properties of $d_{33}{=}575$(pC/N), $k_{\text{p}}{=}0.55$ and ${\varepsilon^{\text{T}}}_{3}/\varepsilon_{\text{o}}$= 3900 are obtained for 0.41PNN–0.36PT–0.23PZ+3.0 mol% ZnO with 1 mol% CuO sintered at 900°C for 2 h.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2004-01-15