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期刊论文
High Temperature XPS/AES Investigation of Mo-La2O3 Cathode I. Species and Properties of Oxygen on Surface*
JOURNAL OF RARE EARTHS, 1999 Vol. 17 No.4，-0001，（）：
In situ activation process of Mo-La2O3 prototype cathode at high temperature was systematically investigat-ed by XPS/AES. The oxygen species produced during the process were characterized at different temperatures. The re-suits show that there exist two kinds of oxygen ions at above 1300 ℃, the lattice oxygen with lower binding energy (Eb=530.00 eV) should be dissociated from the lattice oxygen of La2O3. It may be concluded that La2O3 was partly re-duced to LaOx(x<3/2) due to the dissociation of lattice oxygen. And the oxygen may play a favorable or an unfavor-able role in emission depending upon its relative quantity and position in the surface layer.
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