supported by National Natural Science Foundation of China(Grant No.51071005);Doctoral Fund of Ministry of Education of China(Grant No.20101103110018);Beijing Natural Science Foundation(Grant No.2102007);Program for Excellent Talents in Beijing(Grant No.PHR201006101)
Sc2O3-W matrix dispenser cathodes have been prepared by powder metallurgy method and tested in Pierce electron guns. The emission current density can reach 72 A/cm2 at 900℃ and over 100 A/cm2 can be achieved at a tem...
Project supported by the National Natural Science Foundation of China (51071005);Beijing Natural Science Foundation (2102007);Program for Excellent Talents in Beijing (PHR201006101)
Scandia pressed cathodes were prepared by powder metallurgy method using mixed powder of scandia doped tungsten and barium-calcium aluminates obtained by different mixing methods.The element distribution uniformity gr...
Project supported by Beijing Natural Science Foundation (2102007);Program for Excellent Talents in Beijing (PHR201006101);National Nature Science funding (51071005)
Scandia doped tungsten powders were prepared by spray drying combined with two-step hydrogen reduction.The particle size of doped tungsten powder,powder morphology and doped tungsten matrix were characterized by scann...