Infrared Study Of Agi Containing Superionic Glasses

Superionic xAgI. (1-x)(Ag2O.nM(x)O(y)) glass systems, where M(x)O(y) = B2O3, P2O5 or MoO3, have been investigated by infrared reflectance spectroscopy in an attempt to identify structural characteristics related to high ionic conductivity! Spectral analysis has shown that AgI influences the local and intermediate range order of the host matr ix in a manner and extent which depends on the Ag2O and AgI contents, as well as on the nature of the glass forming oxide. Study of the far infrared profiles have suggested that silver ions occupy two types of oxide and one iodide site. The existence of mixed oxyiodide sites was also inferred. The extent of organisation of silver iodide sites into AgI like microdomains was found to increase with AgI content and depend on the nature of the oxyanion matrix.