Effects of temperature and frequency on the dielectric properties of AgPO3 glass

Effect of Sodium Iodide Dopant Concentration on the Electrical Behavior of AgPO3 Glassy Networks

“…At low frequency, the R-C circuit model suggests that the contribution of the electrodes is more prominent than the glass sample itself, but at high frequency, the dominant effect of conduction comes from the bulk resistance of the glass with negligible effect due to electrodes. Also, the obtained Nyquist plots showed that the intercept of the semicircle with the real axis always occurs at α = 0 regardless of the temperature or dopant concentration (where a is the angle of deviation between the diameter of the semi-circle and the real axis), which explains the conductivity independence of the frequency [8,29]. Same behavior was noticed in the Z' vs. frequency figures mentioned before.…”

“…Among the solid electrolyte systems, a great attention has been delivered to the phosphate-based glasses due to their high mechanical stability, chemical durability, high glass transition and crystallization temperature [8], and high electrical conductivity at room temperature [9]. The electrical conductivity of glasses such as AgPO 3 is quite low, but doping such systems with NaI, AgI, and KI increases the conductivity up to 10 -3 Ω -1 cm -1 [10][11][12][13][14].…”

Synthesis and physical characterization of KNbO3-based electro-ceramics

“…Dierent from the case of an ideal dielectric (stores electrical energy), where the dielectric permittivity is frequency independent, in practice, for a real dielectric (which dissipates electrical energy), the dielectric permittivity is strongly frequency-dependent, 18 Pure dielectric losses or conductive losses for either series or parallel circuits, respectively decreasing linearly in most cases with increasing frequency. This technique is used for lower frequencies and allows to study the dipolar rearrangement and lattice polarization mechanisms [101,104,105].…”