Vanadium(IV) oxide
(重定向自Vanadium dioxide)
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Vanadium(IV) dioxide is the inorganic compound with the formula VO2. It is a dark blue solid. Vanadium(IV) dioxide is amphoteric, dissolving in non-oxidising acids to give the blue vanadyl ion, [VO] and in alkali to give the brown [V4O9] ion, or at high pH [VO4]. VO has a phase transition very close to room temperature(~66 °C). Electrical resistivity, opacity, etc, can change up several orders. Due to this properties, it has been widely used in surface coating, sensor, imaging. The potential application including memory device.