La2O3-Gd2O3-Mo次级发射材料研究

La₂O₃-Gd₂O₃-Mo次级发射材料研究

基金项目:

国家重点基础研究发展规划基金资助项目(973项目)(G1998061316)

北京市自然科学基金资助项目(2992006)

北京市科技新星资助项目(954810700).

详细信息

College of Material Science and Engineering, Beijing Polytechnic University, Beijing 100022, China

摘要: 采用粉末冶金方法制备了新型La₂O₃-Gd₂O₃-Mo次级发射材料.测试了其次级发射性能.实验结果表明,在钼中加入稀土氧化物可以具有很好的次级发射性能,其次级发射性能与激活温度密切相关.经过1360℃的激活处理后,该材料的最大次级发射系数可达2.65,超过了材料使用要求的2.0的发射水平.
- La₂O₃-Gd₂O₃-Mo /
- 次级发射 /
- 阴极
Abstract: The powder metallurgy method was adopted to prepare the new type secondary emission material. The result of testing its emission performance shows that the molybdenum added with rare earth oxides may have good secondary emission performance, which has much to do with the activation temperature. After activating treatment at 1 360 ℃, the maximum secondary emission coefficient of this material may reach 2.65, exceding the application demand of the material(2.0).
- La₂O₃-Gd₂O₃-Mo /
- secondary emission /
- cathode

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