Structure of K2O-TeO2 glasses

Citation
R. Akagi et al., Structure of K2O-TeO2 glasses, JPN J A P 1, 38, 1999, pp. 160-163
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Volume
38
Year of publication
1999
Supplement
1
Pages
160 - 163
Database
ISI
SICI code
0021-4922(1999)38:<160:SOKG>2.0.ZU;2-G
Abstract
The structure at room temperature and structural change from room temperatu re to the temperature above melting point (T-m) of K2O-TeO2 glasses were st udied by the use of XAFS spectroscopy, high temperature Raman spectroscopy, high-temperature XRD and X-ray RDF (Radial. Distribution Function). XAFS s pectroscopy has indicated that K2O-TeO2 glasses consist of both TeO4 trigon al bipyramid (tbp) units and TeO3 trigonal pyramid (Cp) units, and high-tem perature Raman results have indicated that TeO4 tbp units convert to TeO3 t p units with the increase of temperature and by the addition of K2O in the K2O-TeO2 glasses. The high-temperature XRD and X-ray RDF results were in go od agreement with the results of the high-temperature Raman spectroscopy. F urthermore, the XAFS spectroscopy has shown that potassium ions have a simi lar local structure in all K2O-TeO2 glasses studied.