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Effect of Water Content on the Electrical Conductivity of Na 2 O≅3SiO 2 Glass
Author(s) -
TAKATA M.,
ACOCELLA J.,
TOMOZAWA M.,
WATSON E.B.
Publication year - 1981
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.1151-2916.1981.tb15894.x
Subject(s) - electrical resistivity and conductivity , activation energy , analytical chemistry (journal) , water content , conductivity , diffusion , alkali metal , mineralogy , materials science , context (archaeology) , infrared , chemistry , thermodynamics , optics , paleontology , physics , geotechnical engineering , organic chemistry , chromatography , biology , electrical engineering , engineering
Na 2 O–3SiO 2 glasses with up to ≅12 wt% water were prepared under high‐pressure, hydrothermal conditions and their electrical conductivities were measured. The conductivity (σ) was found to depend on H 2 O content in a manner similar to the “mixed‐alkali” effect. At constant temperature, σ decreased initially with increasing H 2 O content to a minimum at 3≅4 wt% H 2 O and increased with further increase in water content. Infrared spectroanalysis of these glasses was made to determine the type of water present in the glass and the results were interpreted in the context of the measured activation energy and preexponential factor of dc conductivity. The sodium ion diffusion coefficient for a glass containing 0.76 wt% H 2 O was less than that of water‐free glass and in agreement with the electrical conductivity results.