Chemical stability ofLa2O3 in La2O3-Mo cathode materials
来源期刊：中国有色金属学报(英文版)2001年第5期
论文作者：王金淑 周美玲 王亦曼 聂祚仁 张久兴 左铁镛
文章页码：681 - 683
Key words：lanthanum; chemical state; La2O3-Mo; cathode; XPS
Abstract: Chemical stability of La2O3 in carbonized and uncarbonized La2O3-Mo cathodes was studied by in-situ XPS analysis. Experimental results show that chemical stability of La2O3 is not good enough. In vacuum and at high temperature, oxygen can be dissociated from the lattice of La2O3 in the uncarbonized La2O3-Mo cathode. Binding energy shifts of La3d5/2 and La3d3/2 core peaks, and obvious decrease of satellite peak intensity in -La3d doublet with increasing temperature show that metallic La appears at carbonized La2O3-Mo cathode surface at high temperature.
