Electrical Properties of Lead Borate Glasses Containing Different Alkali Metal Oxides

Abstract

The dc-electrical conductivity of lead borate glasses with different leadboron
ratios and lead borate glasses containing basic cations of Na⁺, K⁺
and Mg²⁺ were measured in the temperature range (308-789 K). The
activation energy of electrical conduction was calculated. It was found that
all samples have semiconducting properties and fit well with the Arrhenius
equation. The ac-electrical conductivities for these samples were calculated
from the dielectric loss data to give a comparison between the ac- and
dc-conductivity of borate glasses taking into consideration the effect of
polarization of the molecule at high frequency. Differential thermal analysis
was carried out for two samples to identify phase transition, which occurs
in the used temperature range. All results are discussed and correlated to
the molecular structure of the prepared glasses.