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Ferroelectricity
Transparent ferroelectric ceramics PbMg$_{1/3}$Nb$_{2/3}$O$_{3-x}$PbZr$_{0.53}$Ti$_{0.47}$O$_3$: Dielectric and electro-optical properties
L. S. Kamzinaa,
W. Ruanb,
G. Lib,
J. Zengb a Ioffe Institute, St. Petersburg
b Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, China
Abstract:
Lanthanum-free high-transparency ferroelectric ceramics PbMg
$_{1/3}$Nb
$_{2/3}$O
$_{3-x}$PbZr
$_{0.53}$Ti
$_{0.47}$O
$_3$ (PMN-
$x$PZT) have been prepared for the first time by a two-stage sintering method. The dielectric and electro-optical properties of the PMN-
$x$PZT ceramics of different compositions, with the values of
$x$ both far from the morphotropic phase boundary (
$x$ = 10, 16, 23%) and close to it (
$x$ = 33%), have been studied. It has been shown that, in compositions lying closer to the morphotropic phase boundary (
$x$ = 23 and 33%), one observes, with no electric field applied, a first-order phase transition to a macrodomain ferroelectric phase, whereas the compositions far from the boundary (
$x$ = 10, 16%) persist in the relaxor cubic phase down to the low-temperature domain. It has been found that, in the ceramic with
$x$ = 33%, the quadratic electro-optical coefficients have at high temperatures (
$T >$ 340 K) the largest value among the relaxor systems, which expands the temperature interval of applicability of these solid solutions in industry.
Received: 01.03.2012
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