A kind of glass tube vacuum packaging method of traveling wave tube cathode

A technology of vacuum packaging and traveling wave tube, applied in cold cathode manufacturing, discharge tube/lamp manufacturing, electrode system manufacturing, etc., can solve the problems of prolonging cathode time, reducing the vacuum degree of the whole tube, and reducing the service life of the whole tube, etc. To achieve the effect of ensuring performance and meeting the needs of preparation
CN104157533BActive Publication Date: 2016-08-24HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
Publication Date
2016-08-24

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Abstract

The invention discloses a glass tube vacuum packaging method for traveling wave tube cathode, comprising the following steps: (1) taking a glass tube with a large end and a small end, preheating and drying; (2) placing protective nets, cathode components or active substances in Into the big end of the glass tube, the cathode part or the active material are fixed on both sides by protective nets respectively; (3) The end face of the big end of the glass tube is closed under the protection of the protective gas; (4) The small end of the glass tube is sealed with a vacuum exhaust (5) seal off the glass tube on the vacuum exhaust stage to complete the vacuum packaging of the cathode component or active material by the glass tube; the present invention carries out vacuum packaging for the cathode component or active material, The cathode parts or active materials are isolated from the outside world, to prevent the cathode parts or active materials from being affected by external factors, to ensure the performance of the cathode parts or active materials, to further ensure the performance of the traveling wave tube, and to meet the preparation needs of the cathode of the traveling wave tube.
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Description

technical field

[0001] The invention relates to the field of manufacturing cathodes of traveling wave tubes in microwave vacuum devices, in particular to a glass tube vacuum packaging method for the cathodes of traveling wave tubes. Background technique

[0002] The cathode is a key component that affects the life of the traveling wave tube. When manufacturing the cathode, it is necessary to fully consider the importance of poisoning resistance to the performance of the cathode. The main factors affecting the cathode poisoning resistance are oxygen and water vapor in the environment, and it is difficult to ensure the continuity of the process during the cathode preparation process, which prolongs the time for the cathode to be exposed to the atmosphere, which is likely to cause the oxidation of cathode parts and active substances. damp phenomenon. The oxidized parts adsorb a large amount of gas, and the adsorbed gas can be separated out again in the vacuum state inside the ...

Claims

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