| 摘要 |
1,114,368. Generators operating by electromagnetic interaction with fluids. COMMISSARIAT A L'ENERGIE ATOMIQUE and INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LUBRIFIANTS. 19 May, 1966 [25 May, 1965; 12 May, 1966], No. 22273/66. Heading H2A. [Also in Divisions B3 and B5] An electrode for an MHD generator is constituted by a laminated ceramic plate, the top layer (i.e. the layer having a face in contact with the ionized gas), being formed of a first stabilized refractory oxide whilst the following layers are formed in turn of the same oxide but enriched to a progressively increasing extent with a second refractory oxide in proportions such that the conductivity of the bottom layer at its working temperature is equal to the conductivity of the top layer at its working temperature. Preferably the first refractory oxide is stabilized zirconia. The second refractory oxide may consist of chromic oxide, or a mixed oxide containing chromium and either yttrium or a trivalent metal of the lanthanide group. The electrode may be made by mixing (for the second and subsequent layers) a powder of each of the first and second oxides in adequate proportions, by superposing the layers in a mould, and by compacting and sintering the layers. Finally, the bottom layer may be coated with a metal deposit intended to collect the current generated. |
