(北京工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院， 北京 100022)
摘 要: 研究了復(fù)合稀土氧化物-鉬-錸金屬陶瓷陰極的二次電子發(fā)射系數(shù)和抗暴露大氣性能， 對發(fā)射后的表面進行了表面分析， 并與單元、 復(fù)合稀土-鉬金屬陶瓷陰極進行了對比。 研究結(jié)果表明： 加入微量錸的復(fù)合稀土氧化物-鉬金屬陶瓷陰極的二次電子發(fā)射系數(shù)可提高8%， 其最大次級發(fā)射系數(shù)δm為2.65， 且具有較好的抗暴露大氣性能。
關(guān)鍵字: 錸； 稀土氧化物； 鉬； 次級電子發(fā)射
Mo cathode doped with RE oxides and Re
LI Hong-yi, ZHANG Jiu-xing
（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
