ELECTRICAL CONDUCTION IN LITHIUM BOROPHOSPHATE GLASSES

Abstract

Electrical conductivity of ternary glass system 30mol%B₂O₃-(70-x) mol% P₂O₅-x mol% Li₂O is carried out using two-probe method. The samples are fabricated using the well known melt quench technique. The measurements are undertaken at room temperature and also in the temperature range 293-473K. The conductance is found to increase by the addition of Li₂O. The conductivity switches from a low voltage ohmic type to the field emitted exponential type for high enough fields. This can be explained on the basis of the Pool-Frenkel phenomenon. The dc activation energies E_a and the refractive indices n are also evaluated