Cation-network interactions in binary alkali metal borate glasses. A far-infrared study
The far-infrared spectra of compositions probing the glass-forming regions of all five binary alkali metal borate systems chi M/sub 2/O x (1 - chi)B/sub 2/O/sub 3/ (0 < chi less than or equal to 0.40, M = Na; and 0 < chi less than or equal to 0.35, M = K, Rb, Cs) have been measured and analyzed to systematically study the alkali metal cation-network interactions and their compositional dependence. Band deconvolution of the measured spectra showed the presence of two distinct distributions of alkali metal cation sites in Li, Na, and K glasses. Similar results have been obtained for rubidium and cesium borate glasses of compositions chi > 0.25. One distribution of cation sites has been observed for the lower alkali metal content Rb and Cs glasses. The fractions of cations in the two different network sites have also been evaluated. The squares of the frequencies of the cation-motion bands were found to vary linearly with composition, and exhibit kinks at chi similarly ordered 20, for all but the Cs glasses. This behavior was explained on the basis of the network structural changes known to occur at this composition.
- Research Organization:
- National Hellenic Research Foundation, Athens, Greece
- OSTI ID:
- 5572065
- Journal Information:
- J. Phys. Chem.; (United States), Vol. 91:22
- Country of Publication:
- United States
- Language:
- English
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ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
25 ENERGY STORAGE
BORATES
ABSORPTION SPECTROSCOPY
CESIUM OXIDES
LITHIUM OXIDES
POTASSIUM OXIDES
RUBIDIUM OXIDES
SODIUM OXIDES
CATIONS
EXPERIMENTAL DATA
FAR INFRARED RADIATION
GLASS
INFRARED SPECTRA
IONIC CONDUCTIVITY
QUANTITY RATIO
ALKALI METAL COMPOUNDS
BORON COMPOUNDS
CESIUM COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
INFORMATION
INFRARED RADIATION
IONS
LITHIUM COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POTASSIUM COMPOUNDS
RADIATIONS
RUBIDIUM COMPOUNDS
SODIUM COMPOUNDS
SPECTRA
SPECTROSCOPY
400201* - Chemical & Physicochemical Properties
250000 - Energy Storage