EFFECT OF TUNGSTEN AND MOLYBDENUM DOPING ON THE SEMICONDUCTOR METALLIC TRANSITION IN VANADIUM DIOXIDE PRODUCED BY EVAPORATIVE DECOMPOSITION OF SOLUTIONS AND HYDROGEN REDUCTION

摘要

V1-xWxO2 and V1-xMoxO2, 0 < x < 0.03, powders have been produced by the evaporative decomposition of solutions of vanadyl sulfate hydrate with tungsten dioxide dichloride or molybdenum dioxide dichloride in a hydrogenitrogen atmosphere. The powders consist primarily of hollow, porous, spherical shells. Differential scanning calorimetric analysis of the powders indicates that the 67 degrees C monoclinic-tetragonal phase transition in VO2 shifts to lower temperatures by 23 degrees C/(at. % tungsten) and 6.3 degrees C/(at. % molybdenum). [References: 15]