A novel nanocomposite Mo-4%La2O3 cathode

作者：Wang XG^*; Song H; Wang ML; Ding BJ

来源：Materials Letters, 2005, 59(14-15): 1756-1759.

DOI：10.1016/j.,atlet.2005.01.060

• nanocompoiste
• cathode
• field emission site

A novel nanocomposite Mo-4%La2O3 cathode has been prepared by sol-gel method and hydrogen reduction process and then hot-pressing sintering technique. The lanthana particles in the nanocomposite cathode were less than 100 nm, and they were about 300-400 nm in the coarse-grained cathode. The particle size of lanthana has a strong effect on the field emission characteristics of cathode. The nanocomposite cathode has superior field electron emission ability than that of the coarse-grained cathode. The sites of field electron emission of the nanocomposite cathode nearly extend over the whole surface of cathode, whereas the emission sites of the coarse-grained cathode concentrate on a small area of the cathode surface. The reasons for the different distribution of emission sites were discussed.

• 出版日期2005-6
• 单位西安交通大学