Ionic conductivity of fluoroaluminoindate glasses

(54 - 2.4x)InF3 + xAlF(3) + (36 - 1.6x)BaF2 + 3xPbF(2) + 10LiF glasses (nin e compositions, x varying from 0 to 18 mol % at 2.25 mol % intervals) were prepared. The glass compositions were taken between the 60InF(3) + 40BaF(2) and 25AlF(3) + 75 PbF3 eutectics, of which the former is glass-forming (10 mol % LiF was added for glass stabilization). The electrical properties of the glasses were studied by impedance spectroscopy at frequencies from 5 H z to 500 kHz and temperatures from 20 to 200 degrees C. The 400-K ionic con ductivity of the glasses was found to rise from 4.3 x 10(-6) S/cm in the Pb F2-free glass to 1.4 x 10(-5) S/cm in the glass containing 54 mol % PbF2; c oncurrently, the 300-K static dielectric permittivity increases from 17 to 29.