| 发明名称 |
Method for manufacturing a heating element for thermionic valves |
| 摘要 |
In order to improve the insulating strength of the aluminium oxide coating of thermionic cathodes it is proposed to densify said coating by dipping in aluminium nitrate solution and calcining.
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| 申请公布号 |
DE3134504(A1) |
申请公布日期 |
1983.03.17 |
| 申请号 |
DE19813134504 |
申请日期 |
1981.09.01 |
| 申请人 |
LICENTIA PATENT-VERWALTUNGS-GMBH |
发明人 |
ANIKA,WILHELM |
| 分类号 |
H01J1/22;(IPC1-7):H01J9/08;H01J1/24 |
主分类号 |
H01J1/22 |
| 代理机构 |
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代理人 |
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| 地址 |
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