Abstract
The frequency- and temperature-dependences of a.c. ionic conductivity of one-dimensional superionic conductors K-priderites, K1.6Mg0.8Ti7.2O16(KMTO) and K1.6Al1.6Ti6.4O16(KATO), which were grown by using a flux with high grade purity, were investigated from 100 Hz to 10 MHz. The complex ionic conductivity along a c-axis was analyzed by using an equivalent circuit constructed by considering the frequency-dependent ionic conductivity σmb and the frequency-independent ionic conductivity σdc which was not observed for samples grown by using a flux with normal grade purity. The σdc was thermally activated and the activation energies for KMTO and KATO were 0.26 and 0.30 eV respectively. The lateral conductivity was very small.
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