Phosphate-based glasses containing transition metal oxides: chemical intercalation of alkali metals and structural investigations by Mössbauer spectroscopy

Courant, S.; Duclot, M.; Pagnier, Thierry; Ribes, M.

doi:10.1016/0167-2738(85)90093-1

Cited by 11 publications

(3 citation statements)

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“…Metal molybdates constitute an important family of inorganic materials for applications as diverse as photoluminescence, sensors, ion conductors and catalysts . Concerning the particular field of electrical conduction, it was shown over the years that mixing of metal molybdates with P 2 O 5 facilitates greatly the formation of glassy electrolytes which combine high ionic conductivity and improved thermal stability against devitrification. − …”

Section: Introductionmentioning

confidence: 99%

“…Unmodified molybdophosphate glasses can be intercalated with Li or Na ions and, thus, they can function as positive electrolyte materials . On the other hand, the doping of molybdophosphate glasses with monovalent metal oxides such as Li 2 O and Ag 2 O can lead to dc ionic conductivity values as high as 10 –2 Sm –1 at room temperature. − These functionalities make molybdophosphates promising materials for electrochemical cells which combine a modified glass as the electrolyte and an unmodified glass as the cathode .…”

Section: Introductionmentioning

confidence: 99%

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Investigation of CuI-Containing Molybdophosphate Glasses by Infrared Reflectance Spectroscopy

et al. 2012

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Superionic glasses xCuI–(l – x)[Cu2MoO4–CuPO3] were prepared and studied by infrared reflectance spectroscopy to investigate the structure of the oxyanion matrix and the type of sites occupied by copper ions. The study was complemented by the consideration of glasses 0.67CuI–0.33[Cu2MoO4–Cu3PO4] and xCuI–(l – x)[Cu2O-nP2O5] with n = 0.33, 0.50, 1.0. The oxyanion structure of glasses xCuI–(l – x)[Cu2MoO4–CuPO3] was found to involve discrete PO4 3‑, P2O7 4‑ and MoO4 2‑ units, where P and Mo are 4-fold coordinated to oxygen, and molybdate octahedral species which have the MoO3 stoichiometry and are linked by Mo–O–Mo bridging bonds. Despite the nominal metaphosphate composition (CuPO3) of these glasses the spectra gave no signature for metaphosphate structures based on the PO3 – unit. Also, increasing amounts of CuI were found to favor the creation of PO4 3‑ and MoO3 species at the expense of P2O7 4‑ and MoO4 2‑. These findings were explained by the acidity order P2O5 > MoO3 and the need to accommodate the bulky CuI in the glassy matrix, a process facilitated by condensed MoO3 octahedral species. Cu ions were found to be present as monovalent cations and to occupy oxide and iodide sites. The latter sites organize into CuI-like pseudophases at high CuI contents, in agreement with the conduction pathway model for superionic glasses.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of CuI-Containing Molybdophosphate Glasses by Infrared Reflectance Spectroscopy

et al. 2012

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“…The limitations of different techniques (including Mossbauer spectroscopy) applied to the study of graphite intercalates was discussed by Schlogl et al (243). In an example of the application of Mossbauer spectroscopy to the study of intercalation compounds, Courant et al (47) were able to determine the structure of phosphate-based glasses containing transition-metal oxides and the structure of the glasses obtained after the intercalation of Li and Na.…”

Section: Materials Studiesmentioning

confidence: 99%