稀土学报(英文版)
稀土學報(英文版)
희토학보(영문판)
JOURNAL OF RARE EARTHS
2003年
5期
538-542
,共5页
王金淑%周美玲%王亦曼%张久兴%聂祚仁%左铁镛
王金淑%週美玲%王亦曼%張久興%聶祚仁%左鐵鏞
왕금숙%주미령%왕역만%장구흥%섭조인%좌철용
chemical state%lanthanum%La2O3-Mo%cathode%rare earths
The chemical reaction between lanthanum oxide and molybdenum carbide was studied by thermodynamic calculation, thermal analysis and in-situ X-ray Photoelectron Spectroscopy. The theoretical results show that at the environment allowing for the evaporation of lanthanum, such as in high vacuum, La2O3 in the La2O3-Mo materials can be reduced to metallic lanthanum by molybdenum carbide (Mo2C). To confirm the conclusion, many analysis methods such as XRD, SPS, and TG-DTA were taken. The experimental results show that the chemical state of lanthanum changes during heating. It was proved, for the first time, that reacted metallic lanthanum appears at the surface of this kind of material at high temperature.
