| 发明名称 |
OXIDE CATHODE |
| 摘要 |
; "Oxide cathode." The emission properties of oxide cathodes, in which yttrium oxide, scandium oxide or a rare earth oxide is added to the electron-emissive material, are improved by using fine-grained yttrium, scandium or rare earth instead of coarse-grained oxide.
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| 申请公布号 |
CA2015399(A1) |
申请公布日期 |
1990.10.28 |
| 申请号 |
CA19902015399 |
申请日期 |
1990.04.25 |
| 申请人 |
PHILIPS'S (N.V.) GLOEILAMPENFABRIEKEN |
发明人 |
DERKS, PETRUS J. A. M.;SMETS, CAROLUS A. |
| 分类号 |
H01J1/14;H01J1/144;H01J1/20;(IPC1-7):H01J1/14;H01J1/32;H01J29/04 |
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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