Preparation and Characterization of (Pb,La)(Zr,Ti)O3 Composites (9/65/35 $\sim$ 6/65/35)

概要

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(Pb,La)(Zr,Ti)O3 (PLZT) composites between PLZT families were fabricated by a two-stage sintering method. The compositions selected in this study were (8/65/35 : 6/65/35) and (9/65/35 : 7/65/35). The internal structures of the composites which coexisted with endmember’s components were examined using an optical microscope. The dielectric properties of the composites suggested the growth of an intermediate and the volume fraction was evaluated by a series connected three-layer capacitor model. $T_{\text{c}}$ and $P_{\text{r}}$ of the composites increased close to the corresponding values of pure PLZT as the mixing fraction approached 50%. Under the same conditions, the composites exhibited larger values of $\tan \delta$ and $E_{\text{c}}$ than the corresponding values of pure PLZT. For thickness vibrational mode, large $k$(0.35–0.50) and small $Q_{\text{m}}$(8–25) are obtaind. These values of the composites are comparable with the corresponding values of (Pb,Ba)LaNb2O6 ceramics.
Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
2003-09-15