摘要:
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.
摘要:
In a method of manufacturing a pressed scandate dispenser cathode, firstly, scandium nitrate, barium nitrate, calcium nitrate, aluminum nitrate and ammonium metatungstate (AMT) are dissolved in de-ionized water, respectively, and then mixed with a solution of a cross-link agent such as citric acid and H2O2. After water bathing, the mixed aqueous solution turns into gel, and the powders are obtained after the gel calcination. Secondly, the calcined powders are reduced by hydrogen. Finally, the reduced powders are pressed into shapes and then sintered in the furnace with the atmosphere of hydrogen or by Spark Plasma Sintering (SPS 3.202-MK-V) in vacuum.
摘要翻译:在制造压制式分配器阴极的方法中,首先将硝酸钪,硝酸钡,硝酸钙,硝酸铝和偏钨酸铵(AMT)分别溶解在去离子水中,然后与交联剂的溶液混合, 连接剂如柠檬酸和H 2 O 2。 水洗后,混合水溶液变成凝胶,在凝胶煅烧后得到粉末。 其次,煅烧粉末由氢还原。 最后,将还原的粉末压制成形状,然后在氢气氛下或通过火花等离子体烧结(SPS 3.202-MK-V)在真空中在炉中烧结。
摘要:
In a method of manufacturing a pressed scandate dispenser cathode, firstly, scandium nitrate, barium nitrate, calcium nitrate, aluminum nitrate and ammonium metatungstate (AMT) are dissolved in de-ionized water, respectively, and then mixed with a solution of a cross-link agent such as citric acid and H2O2. After water bathing, the mixed aqueous solution turns into gel, and the powders are obtained after the gel calcination. Secondly, the calcined powders are reduced by hydrogen. Finally, the reduced powders are pressed into shapes and then sintered in the furnace with the atmosphere of hydrogen or by Spark Plasma Sintering (SPS 3.202-MK-V) in vacuum.
摘要翻译:在制造压制分配器阴极的方法中,首先将硝酸钪,硝酸钡,硝酸钙,硝酸铝和偏钨酸铵(AMT)分别溶解在去离子水中,然后与交联剂 连接剂如柠檬酸和H 2 O 2 O 2。 水洗后,混合水溶液变成凝胶,在凝胶煅烧后得到粉末。 其次,煅烧粉末由氢还原。 最后,将还原的粉末压制成形状,然后在氢气氛下或通过火花等离子体烧结(SPS 3.202-MK-V)在真空中在炉中烧结。
摘要:
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.