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Thermionic tungsten/scandate cathodes and methods of making the same
Thermionic tungsten/scandate cathodes and methods of making the same
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机译:热离子钨/ scan酸盐阴极及其制备方法
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摘要
A thermionic dispenser cathode having a refractory metal matrix with scandium and barium compounds in contact with the metal matrix and methods for forming the same. The invention utilizes atomic layer deposition (ALD) to form a nanoscale, uniform, conformal distribution of a scandium compound on tungsten surfaces and further utilizes in situ high pressure consolidation/impregnation to enhance impregnation of a BaO—CaO—Al2O3 based emissive mixture into the scandate-coated tungsten matrix or to sinter a tungsten/scandate/barium composite structure. The result is a tungsten-scandate thermionic cathode having improved emission.
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机译:具有与金属基质接触的scan和钡化合物的难熔金属基质的热电子分配器阴极及其形成方法。本发明利用原子层沉积(ALD)在钨表面上形成nano化合物的纳米级均匀均匀的共形分布,并且还利用原位高压固结/浸渍来增强BaO的浸渍。基于Sub> 2 Sub> O 3 Sub>的发射混合物到涂覆有date酸盐的钨基体中,或烧结钨/ date酸盐/钡复合结构。结果是具有改善的发射的钨scan酸盐热电子阴极。
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