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Scandia (Sc)-doped pressed cathodes were prepared by different methods, including mixing of scandium oxide and barium-calcium aluminates with tungsten by manual mechanical mixing, high-energy ball-milling, and liquid-liquid doping. The surface behavior of the active substance, microstructure, and emission properties of the cathodes has been studied by auger electron spectroscopy, scanning electron...
A RE2O3-Mo cathode which contains Lu2O3 and Y2O3 with a certain weight ratio was made using a Sol-Gel technique and the spark plasma sintering technique. The maximum secondary emission yield (deltam) of this cathode could reach 4.6 while the activation temperature is only 900degC.
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