Method for producing a pellet of at least one metal oxide, its use as nuclear fuel

The present invention relates to a sintering process of a compacted powder of at least one oxide of a metal selected from an actinide, or a lanthanide, said method comprising the following successive steps performed in an oven and under an atmosphere comprising an inert gas, dihydrogen and water: (a) a rise in temperature from an initial temperature Ti to a temperature TP bearing (b) maintaining the temperature in the bearing temperature TP, and ( c) a fall in temperature from the construction bearing temperature to a final temperature T F, wherein the ratio P (H2) / P (H 2 O) is such that: - 500

actinide, or a lanthanide and the use of such a chip as nuclear fuel.