(北京工业大学 材料科学与工程学院， 北京 100022)
摘 要: 研究了复合稀土氧化物-钼-铼金属陶瓷阴极的二次电子发射系数和抗暴露大气性能， 对发射后的表面进行了表面分析， 并与单元、 复合稀土-钼金属陶瓷阴极进行了对比。 研究结果表明： 加入微量铼的复合稀土氧化物-钼金属陶瓷阴极的二次电子发射系数可提高8%， 其最大次级发射系数δm为2.65， 且具有较好的抗暴露大气性能。
关键字: 铼； 稀土氧化物； 钼； 次级电子发射
Mo cathode doped with RE oxides and Re
（School of Materials Science and Engineering,Beijing Polytechnic University, Beijing 100022, China）
Abstract: Properties of secondary emission and atmosphere exposure characteristic for molybdenum cathode doped with rare earth(RE) oxides and Re were investigated. Microstructures of the sinter were analyzed using SEM, and compared with one of molybdenum cathode doped with different RE oxides sinter. The results show that the secondary emission coefficient of the RE-Mo sinter can be increased by 8%. The maximum secondary emission coefficient(δm) is 2.65. The emitter possesses the better property of exposition in atmosphere.
Key words: Re; rare earth oxide; molybdenum; secondary emission
