Article ID Journal Published Year Pages File Type
1482327 Journal of Non-Crystalline Solids 2011 4 Pages PDF
Abstract

The dc conductivity of semiconducting cobalt–phosphate glasses has been measured at temperatures ranging from 213 to 530 K. Four bulk samples of CoO–P2O5 glasses of different compositions were produced by melting dry mixtures of analytical reagent grades of CoO and P2O5 at temperatures between 1200–1250 °C for 2 h using a press-quenching method from glass melt. Samples were annealed at 400 °C for 1 h. The dc conductivity was found to be dependent on the CoO content in the glass. At temperatures from 213 to 444 K, however, both Mott's variable-range hopping (VRH) and the Greaves' intermediate range hopping models are found to be applicable. VRH at this range of temperatures is attributed to large values of the disorder energy of these glasses.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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