提示
聂祚仁
-
78浏览
-
0点赞
-
0收藏
-
0分享
-
161下载
-
0评论
-
引用
期刊论文
High Temperature XPS/AES Investigation of Mo2La2O3 Cathodes Ⅱ. Variation of Lanthanum During Activation Processes X
JOURNAL OF RARE EARTHS, 2000 Vol.18 No.2，-0001，（）：
The changes of the valence state of lanthanum in the Mo-La2O3 model cathode specimens were systemati-cally studied by in-situ XPS/ AES analyses from room temperature to 1550 ℃. The experimental results show that the valence of lanthanum changes during the activation processes. As the temperature increases, the lattice oxygen in La2O3 is dissociated, resulting in partial reduction of the lanthanum to LaOx (x<3/2). In addition, the lan-thanum-rich phase diffuses from bulk into the surface of the sample. The lack of lattice oxygen in this phase has a favorable effect on emission, which leads to a lower work function for the Mo2La2O3 cathode.
【免责声明】以下全部内容由[聂祚仁]上传于[2005年04月27日 21时56分35秒]，版权归原创者所有。本文仅代表作者本人观点，与本网站无关。本网站对文中陈述、观点判断保持中立，不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考，并请自行承担全部责任。
本学者其他成果
同领域成果
