Studies of silver–vanadate–phosphate glasses by Raman, EPR and impedance spectroscopy methods

Electronic and ionic conductivity studies on microwave synthesized glasses containing transition metal ions

“…These values are comparable with the activation barriers of electronically conducting glasses [26]. Also, the non-linear variation of activation energy was reported by Garbarczyk et al [8] and Jozwiak et al [26] in their studies on silver-vanadate-phosphate and Li 2 O-V 2 O 5 -P 2 O 5 glass system, respectively. In order to elucidate the observed variations in dc and E dc , impedance spectroscopy and EPR studies have been carried out.…”

“…The impedance spectra consisting of two semicircles represent mixed conduction while glasses exhibiting a single semicircle without spur are electronically conducting. Garbarczyk et al [8] reported the simulated impedance spectra characteristic for ion conduction, mixed conduction and electronic conduction with the equivalent electrical circuits used to generate the spectra [8,[28][29][30]. Conductance (G) and capacitance (C p ) were directly measured (for x = 10 mol%) from the impedance bridge and used to compute the real and imaginary parts of impedance using the relations given by Ross Macdonald [31].…”

Influence of Various Glass Compositions on Physical and Spectroscopic Properties of Cao-Pb3O4-Zno-P2O5 Glass System

“…6) are 330-340 cm -1 assigned to the bending vibration of the phosphate polyhedral [29], the band at 670 cm -1 is reported to be symmetric stretch mode of the bridging oxygen atoms on Q 2 tetrahedra (P-O-P) [30]. P-O-P asymmetric stretching vibration mode is assigned to 750 cm -1 band position, a shoulder at ~ 910 cm -1 and a band at ~ 1020 cm -1 which is appropriate to assign to the P-O stretching modes 29,31]. The band at ~1100cm -1 is due to ( s ( PO 2 ) -) mode [32], the bands at 1140 cm -1 and 1170 cm -1 are attributed to (P-O) -stretch and (PO 2 ) sym stretch, Q 2 units [33].…”

Synthesis, characterization and properties of SrO-doped silver phosphate glass

“…In the last decades, phosphate-based glasses have been of interest for a variety of applications due to their several special properties such as large thermal expansion coefficients (TEC), low melting temperatures and solubility [1][2][3][4][5]. Phosphate glasses are finding ever-increasing applications in many emerging technologies, e.g., vitrification of radioactive waste, photonics, fast ion conductors, glass-to-metal seals and biomedical engineering, etc.…”