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Swenson, Jan; Matic, Aleksandar; Gejke, Cecilia; Börjesson, Lars; Howells, W.S.; Capitán, M. J.

doi:10.1103/physrevb.60.12023

Cited by 28 publications

(19 citation statements)

References 49 publications

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“…It has already been reported that the covalent character of P-O-P bond increases with increase in Strontium in the glass network [32]. Overall results of IR spectral studies showed that strontium doping modifies the structure of silver phosphate glass to some extent and a P-O-Sr bond is formed in the network structure [33,34]. DSC studies for undoped Ag 2 O-P 2 O 5 glass and SrOdoped Ag 2 O-P 2 O 5 glasses were also made (Fig.…”

Section: Introductionmentioning

confidence: 80%

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

Singh

Choudhary

2015

J Therm Anal Calorim

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Silver phosphate (Ag 2 O-P 2 O 5 ) glasses undoped and doped with 5, 10, 15 and 20 mass% SrO were prepared by quench melt method. The glasses were characterized by X-ray diffraction, FT-IR spectra, differential scanning calorimetry and scanning electron microscopic techniques. Electrical conductivities, dielectric constants and dielectric losses at different temperatures and frequencies were also measured. It was found that the glassy character decreased with dopant concentration. Electrical conductivities increased with temperature and decreased with frequency. Results have been discussed.

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Section: Introductionmentioning

confidence: 80%

“…However, the dependence of Tg on dopant salts is quite complex. This complex behavior of glass transition temperature has been attributed to the cationpolyanion (PO 3 ) n ninteraction, which governs the polyanions mobility [34]. When strontium oxide is doped in the phosphate network, P-O-Sr bond is formed.…”

Section: Introductionmentioning

confidence: 99%

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

Singh

Choudhary

2015

J Therm Anal Calorim

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“…Ces modèles ont montré par exemple que deux alcalins présent dans les verres étaient distribués de façon homogène [43]. L'ajout de sels dans ces verres (par exemple AgI [44]) conduit à la dilatation du réseau ce qui va favoriser la formation de chemins pour les déplacements ioniques.…”

Section: Le Réseau Polymériqueunclassified

“…Le couplage des deux méthodes de diffraction a été largement utilisé pour étudier des verres boratés ou phosphatés présentant une bonne conduction ionique. Le réseau vitreux boratés ou phosphatés a pu être étudié plus spécifiquement avec les résultats de diffraction des neutrons, alors que l'organisation des éléments responsables de la conduction ionique (oxydes alcalins ou sels) ont été regardé par diffraction des rayons X [41,[43][44][45][46]65].…”

Section: Complémentarité De La Diffraction Des Rayons Xunclassified

La structure des verres étudiée par diffraction des neutrons

Cormier

2003

J. Phys. IV France

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Résumé : La diffraction des neutrons est une méthode largement utilisée pour déterminer la structure des matériaux amorphes et en particulier des verres. L'utilisation de la méthode de substitution isotopique permet d'extraire les fonctions de distribution de paires partielles centrées autour d'un élément choisi. Nous présentons quelques exemples récents d'études par diffraction des neutrons sur des verres qui ont permis de mieux comprendre à la lois le réseau polymérique de la matrice vitreuse et l'environnement local et à moyenne distance autour des cations. Ces études ont révélées un ordre structural s'étendant au delà des premiers voisins, jusque vers de distances d'environ lu A. Le couplage avec d'autres méthodes expérimentales (diffraction anomale des rayons X) et des techniques de simulations (dynamique moléculaire, Monte Carlo Inverse ou RMC) sont indispensables pour affiner nos connaissances de la structure des verres.

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“…1,2) The increase of ionic conductivity is proportional to exponent of the dopant concentration and valence number of the metal ion. Meanwhile, silver bromide doped silver phosphate glass has less ionic conductivity than the iodide-doped one.…”

Section: Introductionmentioning

confidence: 99%

Far-Infrared and Millimeter Wave Spectroscopy of Halides-Doped Silver Phosphate Glasses

Awano

Takahashi

2010

J. Phys. Soc. Jpn.

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Structural change by halides-doping into silver phosphate glass was studied by terahertz spectroscopy. The spectral change of far-infrared region suggests following model of structural change; the doped metal ion substitutes silver ions which were connected with non-bonding oxygen in proportion to its valence. The released silver ions contribute to ionic conduction. The halogen ions expand conduction channel for the silver ion between glass network chains of PO 4 tetrahedra. This expansion is small in the case of bromide-doping therefore the conduction channel is narrow than in the case of iodide-doping. New millimeter wave absorption bands were observed. Molecular dynamics simulation calculation was also executed.KEYWORDS: far-infrared, millimeter wave, conducting, silver phosphate, glasses IntroductionThe enhancement of ionic conductivity by metal iodide doping into silver phosphate glass has been reported with BiI 3 , CdI 2 and other metal iodides.1,2) The increase of ionic conductivity is proportional to exponent of the dopant concentration and valence number of the metal ion. Meanwhile, silver bromide doped silver phosphate glass has less ionic conductivity than the iodide-doped one. These facts suggest the following mechanism of the enhancement of ionic conductivity; the doped metal ion substitutes silver ions which were connected with non-bonding oxygen according to their valence and the released silver ions contribute to ionic conduction. The halogen ions expand conduction channel for the silver ion between glass network chains of PO 4 tetrahedra. This expansion is small in the case of bromide-doping therefore the conduction channel is narrow than in the case of iodide-doping. This paper reports results of far-infrared and millimeter wave spectra of metal bromides and iodides doped silver phosphate glasses to investigate ionic motion in the above mentioned model of glasses.

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Conductivity enhancement inPbI2−AgI−Ag

Cited by 28 publications

References 49 publications

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

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

La structure des verres étudiée par diffraction des neutrons

Far-Infrared and Millimeter Wave Spectroscopy of Halides-Doped Silver Phosphate Glasses

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