Systems of Na‐Fe‐SiO₂ Glasses and Steel: II, Moessbauer Spectroscopy*

Abstract

Moessbauer effect spectroscopic studies were made on Na-FeSi02 glasses before and after wetting experiments on steel in an Ar atmosphere. The glasses prepared under reducing conditions contained Fe3+ ions. The Fez+/Feq+ ratio for all glasses increased a5 the time at wettability test temperature was increased. Iron in the glasses (according to isomer-shift data) was possibly octahedrally coordinated. The Fe environment in glasses very nearly saturated with Fe oxide was most symmetrical. The glasses prepared under reducing conditions exhibited more symmetrical Fe environments than those prepared under oxidizing conditions. The structural symmetry in the glasses very nearly saturated with Fe oxide facilitated the electron transfer reaction, 2Fe"++ Feo= 3Fep+; the conversion to Fez+ occurred to the greatest extent in these glasses.

Amorphous Solids : A Review of the Applications of the Mössbauer Effect

“…The coordination number in a silicate glass for instance tells whether the iron is a glass former (four-coordinated, replacing silicon) or a network modifier (six-coordinated, in an interstitial position). This information has helped in understanding the chemical processes involved in slags [37] or in glass-steel bonds [38].…”

Moessbauer spectrometry

“…The kinetics of reaction in ferrous oxalate-boric acid glasses has been studied by 87Fe Mossbauer effect (370). Glass-to-metal bonding has been correlated with Mossbauer spectra by Bhat et al (59). The surface effects of small particle size on the Mossbauer spectra of a-Fe203 have been measured by van der Kraan (768).…”