✦ LIBER ✦

Electrical Conductivity of Semiconducting Tungsten Oxide Glasses

✍ Scribed by Tandon, R.P. ;Hotchandani, S.

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 110 KB
Volume: 185
Category: Article
ISSN: 0031-8965
DOI: 10.1002/1521-396x(200106)185:2<453::aid-pssa453>3.0.co;2-l

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✦ Synopsis

The conductivity measurements of 60WO 3 -40B 2 O 3 and 40WO 3 -5Sb 2 O 3 -55TeO 2 glasses have been carried out as a function of temperature. The results suggest that the conduction occurs by hopping of small polarons. Dielectric measurements of 60WO 3 -40B 2 O 3 glass show that the temperature behavior could be described in terms of Debye type dispersion. The oxygen sensing properties of 40WO 3 -5Sb 2 O 3 -55TeO 2 were also examined. The reduction in its conductivity in oxygen is attributed to the oxidation of W 5+ ions to W 6+ ions. A large change in the conductivity of this tellurite based glass in oxygen suggests that the glass can be used as a potential oxygen gas sensor.

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