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Results of development, emission properties investigations, and applications of cathode materials based on lanthanum hexaboride (LaB6), LaB6-MeIV-VIB2, and also rhenium-tungsten (Re-W) dispenser and pressed-oxide cathodes are presented. Emission properties of a novel class of directionally crystallized lanthanum hexaboride-based eutectics have been studied. The LaB6-MeIV-VIB2 composites exhibit improved...
Method of obtaining hot-pressed composed cathodes based on barium hafnate with tungsten with different percentage of components and experimental results of thermoemission properties investigations of these cathodes are represented. It is shown that cathodes of 63 mass% BaHfO3 + 37 mass% W is most effective one. It allows to obtain the thermoemission current density 230 A/cm2 at 2000 K. Evaporation...
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