Methods of making a niobium metal oxide

"METHODS OF PRODUCTION OF A NODE METAL OXIDE". Methods for at least partially reducing a niobium oxide are described wherein the process includes the hot treatment of a niobium oxide in the presence of an absorbent material and in an atmosphere which allows the transfer of the oxygen atoms from the niobium oxide to the material absorbent, and for a time and temperature sufficient to form an oxygen reduced niobium oxide. Niobium oxides and / or suboxides are also described as well as capacitors containing anodes made from niobium oxides and suboxides.