Dielectric and Piezoelectric Properties of KNbO3–NaNbO3–LiNbO3–SrTiO3 Ceramics
スポンサーリンク
概要
- 論文の詳細を見る
For the purpose of the developing Pb-free piezoelectric ceramics, the dielectric and piezoelectric properties of two series of KNbO3–NaNbO3–LiNbO3–SrTiO3 (KN–NN–LN–ST) perovskite ceramics, namely 0.47KN–0.47NN–($0.06-x$)LN–$x$ST ($0\leq x\leq 0.06$) and 0.45KN–0.45NN–($0.10-y$)LN–$y$ST ($0.02\leq y\leq 0.10$) were investigated as functions of composition. In both series, the orthorhombic perovskite phase formed at lower temperatures, and was transformed to tetragonal form and then cubic form with increasing temperature. The orthorhombic–tetragonal transition temperature ($T_{\text{ot}}$) and tetragonal–cubic transition temperature (Curie temperature, $T_{\text{c}}$) gradually shifted toward lower temperatures with increasing ST content. For the 0.47KN–0.47NN–($0.06-x$)LN–$x$ST series, the $T_{\text{ot}}=100$ °C and $T_{\text{c}}=500$ °C for $x=0$, and the $T_{\text{ot}}=-20$ °C and $T_{\text{c}}=220$ °C for $x=0.06$. For the 0.45KN–0.45NN–($0.10-y$)LN–$y$ST series, $T_{\text{ot}}=-30$ °C and $T_{\text{c}}=450$ °C for $y=0.02$, and $T_{\text{ot}}=-60$ °C and $T_{\text{c}}=330$ °C for $y=0.05$. Among the ceramics obtained, the 0.45KN–0.45NN–0.06LN–0.04ST composition showed relatively good piezoelectric properties, $k_{p}=0.33$ and $d_{33}=120$ pC/N, which are comparable to those of Pb-free piezoelectric ceramics previously reported.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2006-09-30
著者
関連論文
- Dielectric and Piezoelectric Properties of NaNbO3–LiNbO3–SrTiO3 Ceramics
- Dielectric and Piezoelectric Properties of KNbO3–NaNbO3–LiNbO3–SrTiO3 Ceramics