Preparation of Ceramic Semiconductors from High‐Vanadium Glasses

Abstract

A number of phosphate glasses with unusually high vanadium content were studied with respect to some of their electrical properties. It was found that 75 to 85 wt% V 2 O 5 could be reacted with various metaphosphates (Ba, Pb, Li, Na, Cd, V, and K) resulting in good‐quality reproducible glasses in 500‐g melts. The electrical resistance of these glasses appeared to be particularly dependent on their thermal history below the liquidus but above the transformation range. A large change in specific resistance resulted when vitreous specimens were heat‐treated to produce varying amounts of devitrification. For a specimen containing potassium metaphosphate, resistivity was reduced from about 10 3 to 10 ohm‐cm.