THE EFFECT OF THE SUBSTITUTION OF B2O3 TO P2O5 ON T(G) AND ELECTRICAL-PROPERTIES OF 0.65((1+X)AG2OP2O5)0.35AGI GLASSES

Glasses of the series 0.65((1+x)Ag2OYB2O3 (1-Y)P2O5)0.35AgI (0 less-th an-or-equal-to x less-than-or-equal-to 0.6 and 0 less-than-or-equal-to y less-than-or-equal-to 0.2) have been prepared. Their glass transfor mation temperature, T(g), electrical conductivity, sigma, and conducti on activation energy, E(sigma) and preexponential factor, sigma0, have been evaluated. The substitution of B2O3 to P2O5 has been found to be useful in making both T(g) and sigma to increase. The results have be en interpreted on the basis of a structure composed of AgI microdomain s in a phosphate or borophosphate matrix and on the basis of the diffu sion path model for ionic conduction.