摘要
制备出了纳米复合WThO2电极材料,这种材料的成分与相组成与传统电极材料相同,但显微组织显著不同。采用真空电弧放电,观察了阴极斑点的分布特征,测定了电极材料的起弧电场强度。通过与传统电极对比,认为大幅度细化氧化物添加剂至纳米尺度,能够显著提高电极材料的电子发射能力,降低逸出功。
A novel W nano ThO 2 electrode has been prepared by hot pressing. Through vacuum arc discharge, electron emission sites on the cathode were examined using SEM. Also, the electric field strength of the starting arc was measured. As compared with the traditional electrode, the W nano ThO 2 electrode has a higher electron emission ability and a much lower work function.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2000年第1期53-56,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金!资助项目 (批准号 :5 97710 2 1)