State of sulphur and Iron-Sulphur Interaction in Soda Silicate Glasses(Materials, Metallurgy, Weldability)
Search this Article
State of sulphur and interaction between sulphur and iron ions in soda silicate glasses were investigated by optical absorption, electron spin resonance(ESR) and S K_α emission spectroscopies. An absorption was observed near 24000cm^<-1> in the optical absorption spectra of the glasses produced in the moderately (P_<o_2>=10^<-5・1>atm.) and strongly (P_<O^2>=10^<-6・7>atm.) reducing atmospheres. From ESR measurement, the increase of the absorption near g=6.0, which suggests the formation of Fe^<3+>-S^<2-> bond, was observed in the glasses with sulphur and iron which were produced in the strongly reducing atmosphere. Chemical shift study in S K_α emission X-ray spectra supported that sulphur in soda silicate glass was in the form of S^<6+> in oxidizing condition (in air) and in the mixed state of S^0 and S^<6+> in the strongly reducing condition. From these results, it was suggested that polysulphide ion such as S^-_2 ion was formed in soda silicate glass as intermediate stage. Further, it was indicated that iron ion group coordinated with sulphur such as Fe^<3+>O_5S, Fe^<3+>O_4S_2 or Fe^<3+>O_3S was formed in soda silicate glasses produced in the strongly reducing condition.
- Transactions of JWRI
Transactions of JWRI 9(1), 53-60, 1980-06