| 发明名称 |
Oxide cathode with rare earth addition |
| 摘要 |
The initial emission and the lifetime of oxide cathodes are considerably improved by adding small quantities of rare earth metals (10-500 ppm).
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| 申请公布号 |
US5347194(A) |
申请公布日期 |
1994.09.13 |
| 申请号 |
US19930051255 |
申请日期 |
1993.04.21 |
| 申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
DERKS, PETRUS J. A. M. |
| 分类号 |
H01J1/14;H01J1/142;H01J1/20;(IPC1-7):H01J19/06 |
主分类号 |
H01J1/14 |
| 代理机构 |
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