Electrical conductivity, relaxation, and scaling analysis studies of lithium alumino phosphate glasses and glass ceramics

Different compositions of lithium aluminum phosphate glasses were prepared by melt quenching technique. The best bulk conductivity achieved by the sample G(3), (28 mol% of lithium oxide). Further, the investigation extended by crystallizing the G(3) sample at different temperatures, 200 A degrees C (GC(200)), 300 A degrees C(GC(300)), 400 A degrees C (GC(400)), and 500 A degrees C (GC(500)). The electrical measurements for all the glasses and glass ceramics were carried out in the frequency range of 1-10(5) Hz and at a temperature range of 393-513 K by the impedance spectroscopy. The variation of conductivity with frequency of the samples was explained in the light of different valency states of aluminum ions. AC conductivity data are fitted to a power law equation. Scaled spectra for ac conductivity and modulus data suggested that the present glass samples follow temperature independent conductivity distribution relaxation mechanism.