Vanadium oxides have been demonstrated to have many interesting and useful applications as battery cathode materials, (V₆0₁₃, Ag₂V₄O₁₁, LiV₃O₈ etc…all available from Lorad), in catalysis, sensors for gas detection, and in thin-film form in electro-optical devices. Recently, vanadium dioxide has attracted attention because two of its polymorphs exhibit a reversible conductor – insulator (semiconductor) transition at relatively low temperatures. In its pure form, the semiconducting (low electronic conductivity) monoclinic form switches to a metallic conducting tetragonal form at 66^oC to 67^oC. The reverse process occurs at about 61^oC – 62^oC.