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Mixed Alkali Effect in Noncoventional Alkali Gallotitanate Glasses
Author(s) -
Miyaji Fumiaki,
Hasegawa Shinya,
Yoko Toshinobu,
Sakka Sumio
Publication year - 1993
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.1151-2916.1993.tb03823.x
Subject(s) - alkali metal , conductivity , silicate glass , electrical resistivity and conductivity , silicate , mixing (physics) , materials science , phosphate glass , mineralogy , inorganic chemistry , chemistry , phosphate , physics , organic chemistry , quantum mechanics
The mixed alkali effect on electrical conductivity, that is, the reduction of conductivity due to alkali mixing, was observed in Na 2 O–K 2 O–Ga 2 O 3 –TiO 2 glasses, which are nonconventional in the sense that glass‐forming oxides defined by Zachariasen are not involved. The magnitude of the reduction in conductivity of the present glasses due to alkali mixing was similar to that of corresponding mixed alkali silicate and phosphate glasses. The activation energy for electrical conduction showed a maximum around the composition Na/(Na + K) = 0.5, where the conductivity was at a minimum.