Premium
Electron Paramagnetic Resonance in R 2 O‐Al 2 O 3 −SiO 2 Glass Systems
Author(s) -
KAYASHIMA MITSUTOSHI,
SANO NOBUO,
MATSUSHITA YUKIO
Publication year - 1978
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1978.tb09316.x
Subject(s) - electron paramagnetic resonance , alkali metal , spectral line , oxide , chemistry , analytical chemistry (journal) , crystallography , mineralogy , materials science , nuclear magnetic resonance , physics , organic chemistry , chromatography , astronomy
Systematic detection of an EPR signal was conducted for three alkali oxide‐Al 2 O 3 −SiO 2 glass systems. Observed EPR spectra, having a main line with g=2.03 and a broad and anisotropic shape, are attributed to the unsaturated bridging oxygen bond resulting from the breakup of the SiO 2 random network. This signal appears in the area AValkali atom ratio >1 for the Na 2 0 and K 2 O systems, indicating that the collapse of the Al 4‐coordinated structure begins at an equimolar ratio when alumina is substituted for the alkali oxide, whereas somewhat different behavior was observed for the Li 2 O system.