Dielectric universal law of lead silicate glasses doped with neodymium oxide

Abstract

Dielectric spectroscopy can, nowadays, cover a very broad frequency range by using a tuned combination of different measurement instrumentation. This technique can provide very useful information concerning the electrical conductivity of glasses used frequently as insulators, and on the possibility of new applications in a large frequency range. In this work we present the dielectric response of lead silicate glasses doped with neodymium oxide, in the frequency range 100mHz–100kHz, and temperature between 300K and 600K. The dielectric behavior follows a power law, ε′(ω)=Bωn-1+ε∞, which is a consequence of the Curie-von Schweidler regime in the time domain. This behavior is frequently applicable to different structural forms, types of chemical bounds and geometric configurations. The values obtained for the exponent n, show that a weak dependence of the permittivity on frequency is observed. The variations with the concentration of the doping oxide are not significant. Nevertheless, the B parameter suffers a variation with concentration, which confirms the cluster formation at a critical concentration.