A study of emission property and microstructure of rare earth oxide-molybdenum cermet cathode materials made by spark plasma sintering

作者：Wang JS^*; Li HY; Yang S; Cui Y; Zhou ML

来源：Journal of Alloys and Compounds, 2004, 379(1-2): 247-251.

DOI：10.1016/j.jallcom.2004.02.046

• spark plasma sintering
• rare earth oxide-Mo
• cermet cathode
• microstructure
• emission property

A fast sintering method, spark plasma sintering (SPS) was used for the synthesis of rare earth oxide-molybdenum cathode material. The secondary emission property, microstructure, and phase constitution of materials have been studied in this paper. The experimental results show that the maximum secondary emission coefficient of this material can be high to 3.84, much higher than that of rare earth oxide-molybdenum cathode made by traditional sintering method. The grain size is less than 1 mum and rare earth distributed evenly in the material. After the material was activated at 1600 degreesC, a 4 mum layer of rare earth oxide which leads to the high secondary emission coefficient of the material, is formed on the surface of the cathode.

• 出版日期2004-10-6
• 单位北京工业大学