In this paper, for
the first time, the influence of the BaTiO3 particles on
the antiferroelectric liquid crystalline phase was shown. Low concentrations
and two different sizes of BaTiO3 particles (nano- and
submicroparticles) were used. It was found that admixture of the ferroelectric
particles causes a decrease in the concentration of free ions in the
liquid crystal matrix. Despite the small amount of admixture, a decrease
in spontaneous polarization, switching time and rotational viscosity,
was observed, while the tilt angle of molecules and the smectic layer
thickness did not change. It turns out that BaTiO3 particles
have a very large impact on the dielectric spectra not only in the
antiferroelectric phase but also in the ferroelectric and paraelectric
phases of the polymorphic mixture studied. The dopants affect also
the complex conductivity. In this paper, we explain why some properties
are modified by BaTiO3 particles and others are not.
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