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Role of Sulfur and Its Diffusion in Silicate Glass Melts
Author(s) -
Frischat Günther H.,
Szurman Monika,
Pfeiffer Thomas
Publication year - 2011
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/j.2041-1294.2011.00041.x
Subject(s) - diffusion , sulfur , barium , materials science , silicate , viscosity , alkali metal , silicate glass , base (topology) , thermal diffusivity , diffusion process , mineralogy , analytical chemistry (journal) , thermodynamics , chemistry , metallurgy , composite material , organic chemistry , physics , mathematical analysis , knowledge management , mathematics , innovation diffusion , computer science
Sulfur diffusion D S is reported on a technical alkali‐poor barium alumoborosilicate glass melt at 900–1400°C and on three further Na 2 O‐modified glass melts at 900°C, using a radioactive tracer method. Whereas D S for the base glass melt amounts to ≈1 × 10 −15 m 2 /s at 900°C, it increases nearly exponentially with increasing Na 2 O content from 0 to 15 mol% by almost three orders of magnitude. Similar to other glass melts, the sulfur diffusion obtained in these melts is also closely related to the Eyring diffusivity D n derived from viscosity. The diffusion controlling species in oxidized melts seems to be SO 4 2− , in reduced melts S 2− . SO 3 2− does obviously not play any role in this transport process.