摘要
介绍了一种新型的纳米薄膜钪钨阴极,该阴极在1000℃(亮度温度)可以提供至少150 A/cm2的拐点电流密度。同时作者指出:含钪阴极的发射机制倾向于热电子发射机制还是"场助热电子发射"机制主要取决于阴极表面发射小岛的形成和维持。
This paper presents a novel nanocomposite s has the capability to provide at least 150 A/cm^2 knee point out that the generation and maintenance of emissive islets cide the Sc-type cathodes emission mechanism to be inclin candia-tungsten current density on the cathode e to dominating coated dispenser cathode, which at 1000℃b. The authors pointed surface is the main factor to dethermionic emission or field enhancement thermionic emission.
出处
《真空电子技术》
2009年第3期17-22,共6页
Vacuum Electronics
关键词
纳米薄膜钪钨阴极
纳米级钪钨粉
大电流密度
Nanocomposite scandia-tungsten
Coated dispenser cathode
High current density
