Abstract
A NASICON based phosphate glass systems (Li(1-x)Nax)5TiP3O12 with various composition x = 0, 0.2, 0.4, 0.6, 0.8 and 1.0 were synthesized by melt quenching method. X-ray diffraction patterns substantiate the amorphous nature. The mixed alkali effect (MAE) was explicated in thermal studies as well as in dielectric spectroscopy. The thermal analysis demonstrates that the series exhibit a MAE in their characteristic thermal parameters also. The dynamics of the ions in mixed alkali glass illustrate miniaturization of dc conductivity and maximum in their respective activation energy at x = 0.6. This decrease in conductivity in the glass composition is observed in all temperature range 273 K to 473 K and follows the same manner as glass transition temperature. The frequency dependence ac conductivity, as well as the electric modulus espouse a few interesting aspects of scaling regarding MAE.
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