使用纳米材料添加剂的新型钡钨阴极的发射性能研究  

Emission Characteristics of Barium-Tungsten Cathode Added with Al_2O_3 and NiO Nano Particles

作　　者：张红卫[1] 吴华夏[1] 贺兆昌[1] 

机构地区：[1]安徽华东光电技术研究所

出　　处：《真空科学与技术学报》2006年第2期147-149,共3页Chinese Journal of Vacuum Science and Technology

摘　　要：根据纳米材料特有的性质,主要研究了使用纳米材料添加剂Al2O3、NiO阴极的发射性能,结果表明使用纳米材料添加剂NiO的阴级在较低的烧结温度时,有较好的发射性能。而添加wt25Ir+nano-NiO(uncoated)和nano-Al2O3(uncoated)的阴极发射效果不好。Emission characteristics of barium-tungsten cathode added with NiO and Al2O3 nano particles were studied. The results show that addition of NiO nano particles significantly lowers its sintering temperature and improves its emission characteristics. However, addition of Al2O3 nano-particles of wt25Ir ＋ NO nanoparticles inversely affects its emission characteristics.

关 键 词：阴极 纳米材料 添加剂 发射性能 

分 类 号：O462.1[理学—电子物理学]