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Method for processing surface of Cu electrode of multistage depressed collector through graphene

A technology of electrode surface and multi-layer graphene, which is applied in the manufacture of electrode systems, manufacture of discharge tubes/lamps, collectors of time-of-flight electron tubes, etc., can solve the problems of many reagents, complicated processing, and limited effects. Achieve the effect of large-area uniform growth graphene coating process

Active Publication Date: 2015-03-25
HEFEI UNIV OF TECH
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Problems solved by technology

However, this method uses more reagents in the reaction process, the processing process is relatively complicated, and the requirements for the material of the collector are more stringent, and special manufacturing of the collector material is required. In the actual application process, the effect is limited to a certain extent.

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  • Method for processing surface of Cu electrode of multistage depressed collector through graphene
  • Method for processing surface of Cu electrode of multistage depressed collector through graphene
  • Method for processing surface of Cu electrode of multistage depressed collector through graphene

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Embodiment Construction

[0031] The invention adopts a vapor deposition method to grow a graphene material coating on the surface of the Cu electrode of the multi-stage depressurized collector, and carries out material modification on the surface of the collector, thereby effectively reducing the secondary electron emission coefficient of the multi-stage depressurized collector electrode.

[0032] Technical process of the present invention:

[0033] 1. Pre-treatment of the electrode: soaking in 10% acetic acid aqueous solution for 30 minutes; acetone ultrasonication for 5 minutes; ethanol ultrasonication for 5 minutes; pure water ultrasonication for 5 minutes; drying the electrode;

[0034] 2. Put the electrode into the sputtering coater and coat with a layer of metal Ni of about 20-50nm;

[0035] 3. Coat the coated electrode with nickel skin on the outside and place it in the quartz tube of the graphene production equipment;

[0036] Purge the quartz tube 3 times with nitrogen;

[00...

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Abstract

The invention discloses a method for processing the surface of a Cu electrode of a multistage depressed collector through graphene, relates to the technology of vacuum electronics, and provides a novel collector processing technology applicable to a high-efficiency travelling-wave tube. According to the method, a grapheme coating is adopted and can be directly used for processing the oxygen-free copper electrode, secondary electron emission is restrained, the recovery efficiency of the multistage depressed collector is improved, and the overall efficiency of the travelling-wave tube is improved. The method is simple in process, controllable in technology and low in cost, and the processed multistage depressed collector can achieve the same secondary electron emission restraining effect as a collector made of graphite. The processed multistage depressed collector has the advantages of a traditional graphite collector, has higher mechanical performance, electric conduction performance and heat conduction performance, and solves the problems that the structure is loose, strength is low and the graphite collector is prone to generating graphite dust under a long-term bombardment of electron beams, thereby effectively improving the efficiency and reliability of the travelling-wave tube.

Description

technical field [0001] The invention relates to a surface treatment method for a multi-stage depressurization collector of a high-efficiency space traveling wave tube, in particular to a method for treating the surface of a Cu electrode of a multi-stage depressurization collector with graphene, which belongs to the technical field of microwave vacuum electronics . Background technique [0002] Space traveling wave tube is a type of traveling wave tube widely used in various space communication systems, such as spaceborne transponders, manned spaceflight and lunar exploration projects, navigation and positioning, space radar detection and electronic countermeasure transmitters. The final stage microwave power amplifier can amplify the weak communication signal to improve the communication quality and increase the communication distance. [0003] As a key component of a satellite communication system, the space traveling wave tube should have the characteristics of wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J9/02H01J23/027
Inventor 杨军邱龙臻李军英李鹏邓光晟尹治平阮久福
Owner HEFEI UNIV OF TECH
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