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

Singh, N.B.; Choudhary, Bhasker Pratap

doi:10.1007/s10973-015-4459-6

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…Glass preparation. The current glasses were synthesized using the melt quench method [32,[40][41][42]. A 1:1 molar mixture of silver nitrate and ammonium dihydrogen phosphate was heated in a platinum crucible to prepare undoped silver phosphate glass.…”

Section: Experimental Techniquesmentioning

confidence: 99%

Microstructure, electrical, optical and electrochemical characteristics of silver phosphate glasses cathode for magnesium battery applications

Khalil

Hameed²,

Farrag³

et al. 2022

J. Phys. D: Appl. Phys.

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The realization of a practical magnesium battery is combined with the development of a high kinetic cathode and compatible electrolyte to facilitate the redox process. For this reason, silver phosphate glasses in the binary system (Fe2O3-AgPO3) are prepared using the conventional quenching method. The glasses were defined in the form [Fe2O3]x[AgPO3](100-x) and the composition with 0  x  40 wt. %. The molar volumes and densities were measured. These glass systems were characterized using XRD, FTIR spectroscopy, UV–Vis-NIR spectrophotometer, electrochemical procedures and impedance spectroscopy. X-ray diffraction revealed that pristine AgPO3 sample was formed in a glassy state, whereas two crystalline phases (AgFeP2O7 and Fe2O3) were formed after the incorporation of Fe2O3 by different concentrations. Bond assignments associated with different functional groups were investigated by an FT-IR spectroscopy. The values of the band gap were decreased with the increase of Fe2O3 content. The effect of grains and grain boundaries in a heterostructure made up of Fe2O3 and AgFeP2O7 crystallites grown in silver phosphate glasses was studied using impedance spectroscopy. The complex impedance, electrical conductivity, and complex electric modulus were measured in terms of frequency and temperature dependency in [Fe2O3]x-[AgPO3](1-x). In the studied glass systems, non-Debye relaxation was observed. Under a variable regime, ac conductivity follows a modified Jonscher's law Arrhenius fitting of multiple relaxation processes in the material yielded activation energy of (0.12 eV–0.271 eV) which support a Maxwell–Wagner relaxation model in the heterostructure glasses at high temperatures and low frequencies. The dc conductivity decreases with iron rate and follows the Arrhenius law with very low activation energy (0.12–0.27 eV. Mg//electrolyte//Glass coin cells are assembled and show an initial discharge capacity of up to ∼564 mAh/g. These materials are attractive for application in modernistic electrochemical devices because of their great compositional and preparation variety which enables tuning the types and techniques of electrical conduction in the material.

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Section: Experimental Techniquesmentioning

confidence: 99%

Microstructure, electrical, optical and electrochemical characteristics of silver phosphate glasses cathode for magnesium battery applications

Khalil

Hameed²,

Farrag³

et al. 2022

J. Phys. D: Appl. Phys.

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“…Melt quench technique was employed to prepare the glasses [7][8][9][10]. Undoped silver phosphate glass was prepared by heating a 1:1 molar mixture of silver nitrate and ammonium dihydrogen phosphate in a platinum crucible.…”

Section: Preparation Of Glassesmentioning

confidence: 99%

“…Silver-ionconducting glasses (superionic solids) exhibit high electrical conductivity and therefore they are attractive as electrolytes for all-solid-state batteries or microbatteries operating at ambient temperature [4][5][6]. Recently, we used BaO/SrO as dopants in silver phosphate glass and studied various properties [7,8]. Attempts were made to understand properties of the glasses.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fe3+-doped silver phosphate glasses

Choudhary

Singh

2016

Bull Mater Sci

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The relationship among the composition, structure and selected properties for five series of silver phosphate glasses containing 0, 5, 10, 15 and 20 wt% Fe 2 O 3 has been investigated. The synthesized glasses have been characterized using different experimental techniques. X-ray diffraction studies revealed that the glasses are amorphous in nature. IR spectral studies have shown the presence of characteristic P-O-P linkages of linear phosphate chains, presence of O-P-O units in the phosphate tetrahedral and the formation of P-O-Fe bonds in the doped glass. It is also confirmed that due to doping of Fe 2 O 3 , loosening of glassy structure occurred and the glass became more disordered. Differential scanning calorimetric (DSC) studies revealed that glass transition temperature increased with Fe 2 O 3 concentration. Scanning electron microscopic studies have shown that Fe 2 O 3 doping modifies the microstructures of the glass and at lower concentration of dopant, a nanostructure is obtained. Electrical conductivity measurements from 303 to 373 K in a frequency range from 100 Hz to 5 MHz have indicated that all glasses are ionic conductors with Ag + ions as the charge carrier. Fe 2 O 3 doping in silver phosphate glass increased the electrical conductivities. Results have shown that dielectric constants increased with the increase of temperature at all the frequencies; a.c. and d.c. conductivities have been separated and a Cole-Cole plot is also drawn. Dielectric losses in all the glasses decreased with frequency at a particular temperature. It is found that Ag 2 O-P 2 O 5 glass doped with 5 wt% Fe 2 O 3 gives high OCV value and the doped glass can be used as an electrolyte for solid-state batteries.

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