Patent ID: 8652703

Claim:
Method for manufacturing a metal-oxide-based ceramic solid electrolyte, comprising the following steps: (a) inserting, into a flash sintering device, a nanocrystalline powder comprising crystallites and crystallite agglomerates of a ceramic of formula: Zr 1-x M x O 2 , where M is chosen from yttrium, scandium and cerium, or Ce 1-x M′ x O 2 , where M′ is chosen from gadolinium, scandium, samarium and yttrium, where x lies between 0 and 0.2, said powder having: an average crystallite size, measured by X-ray diffraction, of between 5 and 50 nm (nanometers), an average crystallite agglomerate size, measured using a scanning electron microscope (SEM), of between 0.5 and 20 μm (microns), a specific surface area, measured using the BET method, of between 20 and 100 m 2 /g; and (b) flash sintering said powder by applying a pressure of between 50 and 150 MPa, at a temperature of between 850° C. and 1400° C., for a period between 5 and 30 minutes.