Original scientific paper

Time and Composition Dependent Electrical Conductivity of Vanadate Glasses Showing Both Cationic Conduction and Electronic Conduction

Atsushi Ikeda ; Department of Biological and Environmental Chemistry, Kyushu School of Engineering, Kinki University Kayanomori11-6, Iizuka 820-8555, Japan
Ken-ichi Fukuda ; Department of Biological and Environmental Chemistry, Kyushu School of Engineering, Kinki University Kayanomori11-6, Iizuka 820-8555, Japan
Tetsuaki Nishida ; Department of Biological and Environmental Chemistry, Kyushu School of Engineering, Kinki University Kayanomori11-6, Iizuka 820-8555, Japan

Abstract

Silver vanadate glasses show electrical conductivity higher than 10–2 S cm–1, caused by the electron hopping from VIV to VV together with an ionic conduction due to Ag+. Lithium vanadate glasses show electrical conductivity of the order of 10–6 S cm–1 which is primarily due to an electron hopping from VIV to VV. Fraction of the Ag+ or Li+ conduction and that of electron hopping from VIV to VV can be estimated by measuring both AC- and DC-conductivities. The latter becomes saturated after 50 min or more due to polarization of the mobile Ag+ or Li+ ions at around the cathode.

Keywords

electrical conducting oxide glass; ionic conduction; electron hopping; polarization; silver vanadate glass; lithium vanadate glass

Hrčak ID:

102671

URI

https://hrcak.srce.hr/102671

Publication date:

31.5.2004.

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