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2 Materials Science Poland

2 2006

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Mixed electronic-ionic conductivity in vanadate oxide glasses containing alkaline ions

100%

Barczyński R. J. , Murawski L.

Materials Science Poland

2006

tom Vol. 24, No. 1

221--227

The conductivity of glasses in 50V2O5-(50-x)P2O5-xA2O (A = Li, Na, K, Rb) systems was investigated as a function of composition. In vanadate-phosphate glasses containing various alkali ions, the conductivity decreases with increasing alkali ion content. The decrease in conductivity is larger for heavier alkali ions and reaches more than seven orders of magnitude in the case of glass containing 40 mol % of Rb2O. Only glasses containing lithium exhibit relatively small conductivity changes - less than one order of magnitude - and an increase for high lithium contents.

Evaluation of transference numbers in mixed conductive lithium vanadate-phosphate glasses

72%

Jozwiak P. , Garbarczyk J. E. , Wasiucionek M.

Materials Science Poland

2006

tom Vol. 24, No. 1

148--153

A method for evaluating the transference numbers in mixed electronic-ionic glasses of the Li2O-V2O5-P2O5 system is proposed and tested, basing on the analysis of temperature dependences of the total conductivity of these glasses. The method consists of representing experimental non-Arrhenius temperature dependences of the total conductivity by a sum of two Arrhenius-like contributions. The latter ones were tentatively attributed to the electronic and ionic partial conductivities.