Impregnated yttric or gadolinium-containing Barium-aluminum-scandate cathodes and their fabrication methods
AssigneeBeijing University of Technology
InventorsJinshu Wang, Wei Liu, Fan Yang, Xiang Liu, Hongyi Li, Meiling Zhou, Tieyong Zuo
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Abstract
Impregnated rare earth metal-containing barium-aluminum-scandate cathodes with a rare earth oxide doped tungsten matrix and methods for the fabrication thereof are described. In one aspect, an impregnated rare earth metal-containing barium-aluminum-scandate cathode comprises: a rare earth oxide doped tungsten matrix, and an impregnated active substance. The active substance comprises scandium oxide (Sc2O3), a second rare earth oxide, and barium calcium aluminate, wherein the molar ratio of Ba:Ca:Al is about 4:1:1.
Claims8
An impregnated rare earth-containing barium-aluminum-scandate cathode, comprising:
- a tungsten matrix doped with a first rare earth oxide;
- and
- an impregnated active substance that comprises scandium oxide (Sc2O3), a second rare earth oxide, and Barium-calcium-aluminate,
- wherein a molar ratio of Ba:Ca:Al of the Barium-calcium-aluminate is 4:1:1, wherein the first rare earth oxide comprises yttrium oxide (Y2O3) or gadolinium oxide (Gd2O3), and wherein the second rare earth oxide comprises Gd2O3.
An impregnated rare earth-containing Barium-aluminum-scandate cathode, comprising:
- a tungsten matrix doped with a first rare earth oxide;
- and
- an impregnated active substance that comprises scandium oxide (Sc2O3), a second rare earth oxide, and Barium-calcium-aluminate;
- wherein the first and the second rare earth oxides are gadolinium oxide (Gd2O3).
Dependencies are inferred from the claim text.