A new cost effective glassy/crystalline superionic system xCul-(100-x)[2Ag(2)O-0.7V(2)O(5)-0.3B(2)O(3)], where x=30, 40, 45, 50 and 60, has been prepared by melt quenching technique and the ionic transport properties were studied. The phase analysis and thermal properties of the samples carried out using XRD, FTIR and DSC techniques confirmed the glassy-crystalline composite nature of the prepared materials. DSC analyses indicated the crystallization of some phases between 130 and 170 degrees C and the subsequent melting of these crystallized phases in the temperature range of 200-250 degrees C. The room temperature electrical conductivity studies were carried out by a.c. impedance analysis. High room temperature electrical conductivity of 3.58 x 10(-3) S cm(-1) was obtained for the best conducting composition. These materials show high t(Ag+) value of 0.997. The use of two glass formers helped to form materials with higher T, higher thermal stability and better ionic transport properties. (C) 2007 Elsevier B.V. All rights reserved.