Ternary Rare Earth Tungsten Electrode Materials Research

W LCY(dopped with La2O3+CeO2+Y2O3) electrode of 2.0mm has been made by means of traditionally industrial metal-processing technology. Compared with Wce electrode and Wcv(dopped with CeO2+Y2O3) electrode, the former is of better electrode performance.Observing and analyzing of the worked WLCY material of different diameter by metallograph,SEM,EDS and electronprobe micro-analyzer ,the results show: While wt percent of dopant is certain,the material's processing property is closely connected with the size and distribution of dopant. Fine and dispersive dopant is benefit to work processing. Oxide compounded with rare-earth elements changes the transfiguration character of material. Analysis of WLCY electrode annealed at high temperature shows: Different proportion of La2O3:CeO2:Y2O3,different changes of dopant in tungsten electrode. Little Y2O3 lead to seperating and spherizing of annealed dopant,while much Y2O3 makes annealed dopant become long particle-chains.That directly influence on processing property and transmit property of heated electrons.