发明名称 |
Electron tube cathode |
摘要 |
<p>An electron tube cathode comprises a base (1) formed mainly of nickel, an alloy layer (4) disposed on the base (1) and including nickel and tungsten having a grain size smaller than that of the base, and an electron emissive material layer (5) deposited on the alloy layer, and including an oxide (6) of an alkaline-earth metal containing at least barium, and a rare earth metal oxide (7) of 0.01 to 25 weight percent and containing at least one of scandium oxide and yttrium oxide. The cathode has a life characteristics improved compared with the prior art, even if operated with a current density of 3 A/cm<2> or more. <IMAGE></p> |
申请公布号 |
EP0845797(A2) |
申请公布日期 |
1998.06.03 |
申请号 |
EP19970120900 |
申请日期 |
1997.11.28 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
SAITO, MASATO;TERAMOTO, HIROYUKI;OHIRA, TAKUYA |
分类号 |
H01J1/14;H01J1/142;H01J1/20;H01J1/26;(IPC1-7):H01J1/14 |
主分类号 |
H01J1/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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