Mössbauer spectroscopy and electrical transport properties of iron doped sodium lead borate glasses

摘要: Abstract Mossbauer Effect (ME) spectroscopy, density and molar volume as well electrical transport measurements were employed to investigate the glass system: (70 − x) mol% B2O3· (x) Pb3O4·10 mol% Fe2O3·20 mol% Na2O [with 0 ≤ x ≤ 35]. Both ME measured at room temperature but conductivity carried out in range from 320 560 K four fixed frequencies [0.12, 1, 10 100 kHz]. The results showed that, lead free sample only, about 80.8% of total iron act mostly network modifier (GNM), while rest precipitated α-Fe2O3. As oxide was just introduced into glass, it assists dissolve all ions through start directly occupy former (GNF) positions. oxygen increased increased. It found also that ac [σ(ω)] is higher than dc (σdc) low temperatures, whereas high σ(ω) approaches σdc frequencies. These explained terms percolation path approximation (PPA) model, due macroscopic inhomogenity network. A good agreement has been obtained between experimental theoretical fitting PPA frequencies, slight deviation. dielectric constant loss with Cole–Cole equation.