Powder containing elongated grains and the use thereof for producing an electrode for a solid oxide fuel cell

A powder constituted by a set of grains obtained by a process comprising a step of synthesizing a solid body followed by a step of milling the solid body, wherein a 10 percentile, denoted D10, of a cumulative granulometric distribution of grain sizes, the grain sizes being classified by increasing size, is 4 μm or more, at least 40% by number of said grains having a form factor (R) of more than 1.5, the form factor (R) of a grain being a ratio between a length and a width of said grain, said powder being constituted, for more than 90% as a percentage by weight, by a substance selected from a manganese perovskite, a lanthanum perovskite, a mixture of manganese perovskite and lanthanum perovskite, a lanthanum-cobalt perovskite (LaCoO3), a lanthanum-iron perovskite (LaFeO3), a lanthanum-manganese perovskite (LaMnO3), a praseodymium-manganese perovskite, a strontium-doped samarium cobaltite, a lanthanide nickelate, a mixture of ruthenium bismuth and erbium bismuth, a mixture of lanthanum-cubic zirconia perovskite, a chromite, a lanthanum titanate, a [niobium-doped strontium] titanate, a [yttrium-doped strontium] titanate, a [strontium-doped lanthanum ] chromo-manganite, a monoclinic zirconia (ZrO2), a partially stabilized zirconia (ZrO2), a cubic zirconia (ZrO2), cerium oxide (CeO2), cerium oxide (CeO2) doped with samarium oxide (Sm2O3) and/or gadolinium oxide (Gd2O3), a cermet comprising cerium oxide (CeO2), a cermet comprising [strontium-doped lanthanum] chromite, a cermet comprising partially stabilized zirconia (ZrO2), a cermet comprising cubic zirconia (ZrO2), or by a mixture of said substances.