物理学报2012，Vol.61Issue(7)：468-473,6.
等离子喷涂含钪氧化物阴极制备及发射特性研究
Preparation and emission characteristic study of plasma-sprayed scandia-doped oxide cathode
摘要
Abstract
Plasma-sprayed scandia-doped oxide cathode is prepared by doping a small amount of scandia into the triple carbonates and employing the air plasma spraying technique.In the preparation process,a small amount of scandia is added in the shaping process of mixing the triple carbonates with an additional 12%—22%of BaCO_3（molar ratio）.The shape and the distribution of the feed material analyzed by using scanning electron microscope show that the size and the shape of the feed material meet the requirement for plasma-spraying and that it fully compensates the loss of barium in the plasma-spraying process.The analysis of the decomposition process shows that scandia-doped plasma-sprayed oxide cathode has a shorter process of decomposition and less exhausted gas amount than the commonly-used oxide cathode.The test on the emission performance of the new type oxide cathode shows that the emission performance of scandia-doped plasma-sprayed oxide cathode is much better than that of commonly-used oxide cathode and that the life time of the former is longer than that of the latter.关键词
含钪氧化物阴极/等离子喷涂/电流发射密度/寿命Key words
scandia-doped oxide cathode/plasma-sprayed/current emission density/life time分类
化学化工引用本文复制引用
张敏,王小霞,罗积润,廖显恒..等离子喷涂含钪氧化物阴极制备及发射特性研究[J].物理学报,2012,61(7):468-473,6.基金项目
中科院国防科技创新基金（批准号：CXJJ-10-S02）资助的课题~~ （）
