The dielectric properties of (1x)PZT–(x)PCN, where
x¼0:1{0:5, are illustrated in Fig. 3. At RT, with an
increase in the concentration of PCN, the dielectric constant
tends to increase because the transition temperature of the
PZT–PCN ceramics shift across RT; hence, the value of the
dielectric properties measured at RT increased, as shown in
Table II. Other authors have reported a similar behavior.
5)
The temperature dependence of the dielectric constant for
the compositions of the (1x)PZT–(x)PCN system show
broad dielectric peaks with an increase in the concentration
of PCN, which indicate a diffuse phase transition. The
diffuse phase transition may have been caused by a decrease
in grain size; the observed difference in the degree of
diffuseness could be a result of the grain size variation, as
shown in Table II,
21)
and chemical inhomogenieties within
the (1x)PZT–(x)PCN solid solution.
2