MAGNETRON WITH COMPACTED NICKEL OXIDE CATHODE Russian patent published in 2016 - IPC H01J25/00 H01J1/14 H01J9/04 

FIELD: electronic equipment.

SUBSTANCE: invention relates to electronic equipment and can be used in electronic devices, in particular continuous or pulsed magnetrons working in a wide range of wavelengths. In a magnetron comprising an anode and a concentrically disposed inside nickel oxide cathode is manufactured by co-pressing a mixture of powders of nickel and emission-active material, sintering compact in a hydrogen environment dried at a temperature of 1,000÷1,200 °C for 15-30 minutes in an emission-active substances are used with a layer of nickel agglomerates triple carbonate particles constituting nickel powder uniformly coated with ternary carbonate of barium-strontium-calcium with thickness of up to 20 mcm. Components of initial mixture for compaction of cathode powders of nickel and said agglomerates of nickel with a layer of ternary carbonate have same granulometric composition. Emission, thermal and mechanical properties of cathode may be controlled by variation of grain composition forming metal and emission-active substance, as well as control of concentration of components of working mixture. Significantly reduced complexity of manufacturing cathode, excluding operations involving use of toxic, reactive and explosive compounds.

EFFECT: technical result is improved stability and reproducibility of electrical parameters of magnetron by using pressed nickel oxide cathode having high uniformity of emission current density and resistance to degradation of effects of ion and electron bombardment.

8 cl, 4 dwg