FILAMENTARY CATHODE MANUFACTURING PROCESS Russian patent published in 1998 - IPC

FIELD: electronic engineering. SUBSTANCE: powdered iridium (Ir) used as basic ingredient is mixed up with powdered cerium (Ce) which is auxiliary ingredient, in desired proportion of ingredients to obtain mixture of powdered metals which is subjected to mechanical treatment by pulverizing it in ball mill of high or low power requirement thereby mechanically fusing it to form fused powder. This fused powder is compressed to form pellet and the latter, in its turn is heated to evacuate residual gases from it. Then pellet performance characteristics are checked. EFFECT: improved current density and life expectancy; facilitated manufacture. 3 cl, 2 dwg