Ionic Conductivity Properties in Bismuth Germanate Silicate Glasses at Various Temperatures

Abstract

Ionic conductivities in the bismuth germanate silicate (BGSO) glasses have been investigated in the frequency range 100 Hz to 15 MHz and in the temperature range from 300 K to above the glass transition temperature T g . The frequency-dependent electrical data have been discussed in the framework of the complex impedance and the power-law conductivity. The electrical conductivity is strongly composition dependent and it follows the Arrhenius relation in the experimental temperature range. The activation energies of dc and ac conductivities obtained by the power-law analysis show that the BGSO glasses satisfy the Barton, Nakajima, and Namikawa (BNN) relation. The temperature-dependent interaction of conducting ions is discussed.

Investigations on electrical conductivity and dielectric properties of Na doped ZnO synthesized from sol gel method

“…6(a) The nature and the mechanism of the conductivity dispersion in solids are generally analyzed using Jonscher's power law [53,54] :…”

Near Constant Loss Dielectric Response in 2Bi2O3–B2O3 Glasses

“…Bi cations migrate through broken network of nonbridging oxygens with ease. Bi ion conduction is reported to be active in the bismuth silicate and bismuth germanate glasses . The heavy Bi 3+ cations with comparatively low mobility would relax at relatively lower frequencies while interacting with oscillating electric field at various frequencies and possess high thermal activation energy.…”

“…Bi ion conduction is reported to be active in the bismuth silicate and bismuth germanate glasses. 17 The heavy Bi 3+ cations with comparatively low mobility would relax at relatively lower frequencies while interacting with oscillating electric field at various frequencies and possess high thermal activation energy. As the temperature increases, the relaxation frequency shifts toward higher frequency side due to thermal activation and one could see the characteristic peak at a certain temperature.…”

Ionic conductivity in borate glasses with three types of mixed alkali cations

“…where σ dc is the dc conductivity from the power-law fit, ν h is the hopping frequency of the charge carriers, and n is a frequency exponent parameter in the range 0 V n V 1 characterizing the deviation from Debye behavior and measurement of the inter-ionic coupling strength [17][18][19][20]. At low frequency, the conductivity of Li-Na-B-O glass is almost frequency independent, approaching the dc conductivity, whilst the conductivity of Li-Na-Rb-B-O and Li-Rb-B-O systems show dispersion at this frequency range.…”