Thermally stimulated conductivity studies of trapping centers in alkali-borosilicate glasses

Abstract

Thermally stimulated conductivity studies have been performed on unirradiated borosilicate glasses made to contain various amounts of sodium, lithium, nickel, and iron oxides. Measurements were made between 77 and 570 o K. All the samples gave one or more conductivity peaks below room temperature. Analysis of the initial-rise slope of the conductivity peaks of the various samples gave trapping-level energies ranging from 0.1 to 1.9 eV. The shape and temperature of the maximum of most of the peaks changed on each measurement cycle. A few samples exhibited a common peak that formed on annealing.