钪酸盐阴极的研究进展  

Research Progress in Scandate Cathode

作　　者：李爱君[1] 王建忠[1] 敖庆波[1] 支浩[1] 马军[1] 许中国[1] 

机构地区：[1]西北有色金属研究院金属多孔材料国家重点实验室,陕西西安710016

出　　处：《材料保护》2013年第S2期142-144,共3页Materials Protection

基　　金：国家自然科学基金重点项目资助项目(51134003);国家自然科学青年基金资助项目(51201139)资助

摘　　要：热阴极发射体广泛应用于微波管、阴极管、等离子体装置和电子束装置。随着微波真空管的快速发展,对热阴极的发射电流密度提出了越来越高的要求。钪酸盐阴极由于其优异的发射性能而被认为最有希望成为下一代阴极。综述了钪酸盐阴极的类型、发展历史和研究现状。Thermionic cathodes are used as electron sources in microwave power tubes,cathode tubes,plasma devices and electron beam instruments. With the rapid development of microwave vacuum devices,an increase of electron emission current density at a given operating temperature is one of the main goals of thermionic cathode improvement for different applications in vacuum tubes. Scandate cathode has been demonstrated to provide tremendous high current density,and has been considered as one of the promising candidates for the future practical application. An overview of scandate cathode type,their historical development and the current status of research are given.

关 键 词：钪酸盐阴极 发射电流密度 抗离子轰击 

分 类 号：O462.1[理学—电子物理学]