Electrical properties of silicate-lead glasses containing nanostructures of iron oxides.

Electrical properties of silicate-lead glasses doped with different content of iron oxide was studied. The set of glass samples were prepared with the composition of (50 − 0.5x)SiO2–(50 − 0.5x)PbO–xFe2O3, where x = 2, 5, 10, 15, 20 and 25 (in mol%).  All sampleswere prepared by the conventional melt quenching technique; the melting was conducted in air at 1623 K in alumina crucibles. The melts were poured on a brass plate preheated to 573 K and formed into button-shaped samples. Afterwards pellets were annealed at 673K, cooledwith the furnace and polished to the thickness of about 1mm. For the electrical conductivity measurements, golden electrodes were evaporated at both sides of preheated samples in vacuum. The linear impedance spectra were measured in the frequency range of 1 MHz to 1 MHz and in the temperature range of 153 K to 423 K by Novocontrol Concept 40 broadband dielectric spectrometer. Detailed information you can find in: http://dx.doi.org/10.1016/j.ssi.2013.10.008