基于铪酸钡钨的高电流密度阴极

2007 IEEE International Vacuum Electronics Conference Pub Date : 2007-05-15 DOI:10.1109/IVELEC.2007.4283309

A. Taran, S. Plankovskyy, E. Ostrovsky, S. Ordanjan

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引用次数: 3

摘要

介绍了以不同组分比例的钨为基材，以铪酸钡为基材制备热压复合阴极的方法，以及研究这些阴极热发射性能的实验结果。结果表明，质量为63%的BaHfO3 +质量为37%的W是最有效的阴极。它允许在2000 K时获得230 A/cm2的热发射电流密度。在T = 1900 K时，质量% W为37的阴极发射活性组分的蒸发速率为G = (5plusmn2)-10-6 kg/(m2-s)。

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High-Current-Density Cathodes Based on Barium Hafnate with Tungsten

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 rate of emission active components for cathode with 37 mass % W at T = 1900 K equals to G = (5plusmn2)-10-6 kg/(m2-s).

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2007 IEEE International Vacuum Electronics Conference

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