Time resolved current spectra (TRCS) and dielectric properties of 50Li2O–50B2O3–xCu2O glass system

• Published in: Journal of non-crystalline solids Vol. 379; pp. 60 - 66
• Main Authors: Song, In Girl, Kim, Hyun Chul
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier B.V 01.11.2013; Elsevier
• Subjects: Alternating current; Charge; Complex impedance spectrum (CIS); Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Dielectric properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Diffusion in solids; Direct current; Exact sciences and technology; Frequency dependence of AC conductivity (FDAC); Glass; Glasses (including metallic glasses); Materials science; Mathematical analysis; Physics; Specific materials; Temperature dependence; Temperature dependence of DC conductivity (TDC); Time resolved; Time resolved current spectrum (TRCS); Transport properties of condensed matter (nonelectronic); Turning time of polarization (TTP); Turning time of polarization (TTP); Temperature dependence of DC conductivity (TDC); Time resolved current spectrum (TRCS); Frequency dependence of AC conductivity (FDAC); Complex impedance spectrum (CIS); Temperature dependence; Polarization; Frequency dependence; Electrical conductivity; Dielectric properties; Glass; Mixed conductivity; Turning; XRD; High temperature; Time resolved spectra; Complex impedance; Relaxation; Diffusion; Activation energy; Vitreous state
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2013.07.035

Ternary 50Li2O–50B2O3–xCu2O glass system whose glassy structure was verified by X-ray diffraction (XRD) has been synthesized. The time resolved current spectrum (TRCS), temperature dependence of DC conductivity (TDC) and frequency and temperature dependence of AC conductivity (FTDAC) of this glass system were investigated in detail. TRCS showed repetitive curves of typical charge and discharge processes for all glasses and they were well satisfied with TRCS equation. It was found, from turning time of polarization (TTP) equation results, that dipole lengths increased linearly with increases of x and configuration energy (CE) values also increased linearly with increases of applied potentials and reversely decreased with increases of x. As different results showed from mixed alkali effect (MAE), DC and AC conductivity increased with the increase of x. Complex impedance spectrum (CIS) showed conductions of mixed ionic migration and electron hopping and complex modulus spectrum (CMS) showed non-Debye type relaxations. Activation energies obtained by TDC were almost consistent with those obtained by CMS for glasses with the same x in high temperature region. •TRCS equation applied to this glass system was consistent with the experimental results.•DC conductivities were slightly improved with the increase of Cu2O content, x.•Dipole lengths and CEs linearly increased with Cu2O content, x.•CIS and CMS showed mixed conductions and non-Debye type relaxations, respectively.•Activation energies of TDC were very well consistent with those of CMS.