| 摘要 |
<p>The present invention relates to oxide-containing cathodes comprising, on the support (1), a layer (20) of one or more oxides of alkaline earth metals, covered with a mixture (21) of one or more oxides of alkaline earth metals and of scandium oxide. Preferably, the mixture of oxides of alkaline earth metals and of scandium oxide contains a proportion by weight of scandium oxide less than or equal to 5%, without however being zero. Moreover, the mixture of oxides of alkaline earth metals and of scandium oxide may be formed by a succession of layers, two successive layers containing a different proportion by weight of scandium oxide. Application to oxide-containing cathodes having a long life and a high current density. <IMAGE></p> |
