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Conductivity Activation Energy Relations in High‐Sodium‐Content Borate and Aluminoborate Glasses
Author(s) -
MARTIN STEVE W.
Publication year - 1988
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.1151-2916.1988.tb05891.x
Subject(s) - activation energy , boron , ionic conductivity , alkali metal , conductivity , analytical chemistry (journal) , sodium , chemistry , electrical resistivity and conductivity , inorganic chemistry , oxide , content (measure theory) , ionic bonding , materials science , mineralogy , ion , electrolyte , mathematical analysis , mathematics , organic chemistry , electrode , chromatography , electrical engineering , engineering
Glasses were prepared having compositions x Na 2 O + (1 − x )B 2 O 3 and x Na 2 O + (1 − x )( n B 2 O 3 ·Al 2 O 3 ) where n = 4.0 and 6.7, and their conductivities and activation energies were determined up to 70 mol% Na 2 O. Below 50 mol% Na 2 O, the conductivity activation energy decreases with Na 2 O content, which is attributed to a decreasing cation jump distance. Above 50 mol% Na 2 O, however, the activation energy increases with Na 2 O content. These measurements are the first to clearly show a conductivity activation energy increasing with alkali oxide content, an effect which is not yet explained by any of the current models of ionic conduction in glass.