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Electrical Conductivity in Mixed‐Alkali Aluminosilicate Melts
Author(s) -
Kim KiDong
Publication year - 1996
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.1151-2916.1996.tb08992.x
Subject(s) - aluminosilicate , alkali metal , conductivity , electrical resistivity and conductivity , oxygen , inorganic chemistry , chemistry , alkaline earth metal , materials science , mineralogy , analytical chemistry (journal) , organic chemistry , catalysis , electrical engineering , engineering
The mixed‐alkali effect in ac electrical conductivity has been investigated in 25R 2 O(Na 2 O+K 2 O)‐ y Al 2 O 3 ‐(75‐ y )SiO 2 melts, with y = 0, 5, 7.5, and 10 mol%, at temperatures of 1000°‐1400°C. The results for the molten state show a typical mixed‐alkali effect, similar to that exhibited below the transformation temperature. These results imply that the interaction between two different alkali ions is maintained in the molten state. However, the mixed‐alkali effect increases as the Al 2 O 3 content increases (in other words, with decreasing nonbridging oxygen content). Such results can be explained in terms of the binding state of AlO 4 ‐R + and ‐O ‐ ‐R + , based on the conductivity behavior of alkali aluminosilicate melts.