IONIC-CONDUCTIVITY OF PBX2-PBO-SIO2 (X = CL, BR, I) GLASSES

PbX2-PbO-SiO2 (X=Cl, Br and I) glasses were prepared and their electri cal properties were investigated. The sole carrier for these glasses i s the X- ion, which was estimated from the EMF (electromotive force) o f the X-2 gas concentration cell and the electrical properties. The io nic conductivity was enhanced with a decrease in ionic radius and incr ease in content of the X- ion in the glasses. The conductivities for t he glass plates are about one order of magnitude higher than those for the pellets prepared from glass powder. For the X=I system, a maximum conductivity of 4.5 x 10(-7) S cm(-1) at 373 K was obtained for the c omposition 0.59PbI(2) 0.31PbO 0.10SiO(2). The glass formation region w as determined for the PbI2-PbO-SiO2 system.