Archives of Acoustics, 32, 4(S), pp. 59-63, 2007

The ferroelectric PLZT type ceramics as a material for transducers

Marek Czerwiec
University of Silesia, Faculty of Computers Science and Materials Science, Department of Material Science, Żeromskiego 3, 41-200 Sosnowiec
Poland

Radosław Zachariasz
University of Silesia, Faculty of Computers Science and Materials Science, Department of Material Science, Żeromskiego 3, 41-200 Sosnowiec
Poland

Jan Ilczuk
University of Silesia, Faculty of Computers Science and Materials Science, Department of Material Science, Żeromskiego 3, 41-200 Sosnowiec
Poland

Modification of the PZT system by the addition La$^{3+}$ ions has marked beneficial effect on
several the basic parameters, such as squerness of the hysteresis loop, decreased coercive filed,
increased dielectric constant, maximum coupling coefficients, increased mechanical compliance,
and enhanced optical transparency.
The mechanical and electrical properties in lanthanum modified lead zirconate-titanate ceramics
of 5/50/50 and 10/50/50 were studied by electric permittivity $\epsilon$ and dielectric losses
tan $\delta$ measurements. The temperature dependences of $\varepsilon = f(T)$ and tan $\delta = f(T)$ were
determinate in temperature range from 300 K to 730 K. The values of $T_C$ obtained during $\varepsilon$
and tan $\delta$ measurements were respectively: 560 K for 5/50/50 and 419 K for 10/50/50.
Keywords: PLZT, electric permittivity, tangent of dielectric loss of angle.
Full Text: PDF


Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN)