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The technique for producing impregnated cathodes with a Re-W ldquospongerdquo matrix (75%-Re/25%-W mass ratio) and 3BaOmiddot0.5CaOmiddotAl2O3 as the emissive active substance has been developed. The emission properties of such cathodes with normal impregnation and of one with excess of emissive active substance have been studied. The cathodes with the normal impregnation have higher emission properties...
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