热电子阴极单晶LaB6制备工艺及发展研究
The Preparation Process and Development Analysis of Single Crystal LaB6 for Thermionic Cathode
高斌 1谷增杰 1耿海 1陈娟娟 1徐金灵2
作者信息
- 1. 兰州空间技术物理研究所 真空技术与物理重点实验室,兰州 730000
- 2. 中国空间技术研究院杭州中心,杭州 310024
- 折叠
摘要
单晶六硼化物LaB6 具有优异的热电子发射性能和化学稳定性,是空间用热电子阴极发射源的理想材料,具有优良的发射效率及寿命.随着空间电推进系统高功率、长寿命的航天任务的实施,大尺寸、低成本、高纯度单晶LaB6 制备技术研究显得愈发重要.在调研国内外LaB6 基体研制技术的基础上,结合单晶LaB6 主流制备技术,针对我国空间电推进应用需求,分析了晶体制备过程中存在的关键技术及难点,提出开展空间用单晶LaB6 工程化研制的初步建议.
Abstract
Single crystal hexaboride LaB6 has excellent hot electron emission performance and chemical stability.It is an ideal material for space thermionic cathode emission sources,which directly affects its emission efficiency and lifespan.With the demonstration of high-power and long-life space missions for space electric propulsion systems,the preparation technolo-gy of large size,low-cost,and high-purity single crystal LaB6 is becoming increasingly important.Based on the research on the development process of LaB6 matrix both domestically and internationally,combined with the preparation technology of single crystal LaB6,aiming at the application requirements of space electric propulsion,the key technologies and difficulties in crystal preparation are analyzed.Some suggestions for the engineering development of single crystal LaB6 are put forward.
关键词
热电子阴极/电推进系统/粉体研制/单晶LaB6Key words
hot electron cathode/electric propulsion system/powder development/single crystal LaB6引用本文复制引用
基金项目
甘肃省自然科学基金(22JR5RA784)
出版年
2024
NETL
NSTL
万方数据