PROCESSES FOR NIOBIUM OXIDE EXTRUSION CASTING OR CONFORMATION AND PREPARATION OF A HYDROLIZED AND AMORPHOUS NIOBIUM OXIDE AND USE OF A NIOBIUM OXIDE IN THE EXTRUDED FORM

摘要

The invention relates to a process for extrusion casting or conformation of a niobium oxide, in which the extruded profile is obtained by means of drying and calcination, in appropriate conditions, of a green extruded profile, which is obtained by extrusion casting of a niobium oxide viscous gel. The invention also relates to a process for preparation of a hydrolyzed and amorphous niobium oxide, in which the hydrolyzed and amorphous niobium oxide is synthesized from organic or inorganic niobium precursors. At last, the invention relates to uses of a niobium oxide in the extruded form.