Differential scanning calorimetry (DSC), infrared (IR) and direct current (DC) conductivity studies have been carried out on (100-2x)TeO2-xAg(2)O-xWO(3) (7.5 <= x <= 30) glass system. The IR studies show that the structure of glass network consists of [TeO4], [TeO3]/[TeO3+1], [WO4] units. Thermal properties such as the glass transition (T-g), onset crystallization (T-o), thermal stability (Delta T), glass transition width (Delta T-g), heat capacities in the glassy and liquid state (C-pg and C-p1), heat capacity change (Delta C-p) and ratios C-pl/C-pg of the glass systems were calculated. The highest thermal stability (237 degrees C) obtained in 55TeO(2)-22.5Ag(2)O-22.5WO(3) glass suggests that this new glass may be a potentially useful candidate material host for rare earth doped optical fibers. The DC conductivity of glasses was measured in temperature region 27-260 degrees C, the activation energy (E-act) values varied from 1.393 to 0.272 eV and for the temperature interval 170-260 degrees C, the values of conductivity (sigma) of glasses varied from 8.79 x 10(-9) to 1.47 x 10(-6) S cm(-1). (C) 2010 Elsevier Ltd. All rights reserved.